Top 10 Beginner Mistakes When Building a DIY Solar System

0:00 Intro
0:14 #10
1:21 #9
2:53 #8
3:56 #7
5:36 #6
6:54 #5
8:51 #4
9:49 #3
12:15 #2
14:29 #1
Does off-grid solar confuse you?
Check out my DIY friendly website for solar system packages and product recommendations, and so much more!
www.mobile-solarpower.com
Join our DIY solar community
#1 largest solar forum on the internet for beginners and professionals alike:
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Check out my Book
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If DIY is not for you, but you love solar and need an offgrid system, check out Tesla Energy! They will price out a system and get your house offgrid: ts.la/william57509
My DIY Solar Equipment Recommendations (Constantly updated! Check here first):
12V/48V Lithium Solar Batteries: www.mobile-solarpower.com/sol...
Complete Solar System Component Directory: www.mobile-solarpower.com/sol...
Complete 48V System Blueprint: www.mobile-solarpower.com/48v...
Plug-N-Play System Recommendations: www.mobile-solarpower.com/ful...
Complete "Add to Cart" 48V System Kits: www.mobile-solarpower.com/com...
DIY Friendly Air Conditioner/ Heat Pumps: www.mobile-solarpower.com/sol...
My Favorite Online Stores for DIY Solar Products:
Signature Solar
Offgrid One-Stop-Shop. Best Value 48V LiFePO4, Victron and Offgrid Specific Heat Pumps:
www.signaturesolar.com/?ref=h...
Current Connected
SOK, Victron, Mr.Cool Heatpumps and High Quality Components. Fantastic customer support:
currentconnected.com/?ref=wp
Litime
My favorite 12V budget battery!:
www.litime.com/?ref=XBIA62RFc...
Epoch Batteries
My favorite high-quality 12V battery:
www.epochbatteries.com/produc...
Renogy
A classic 12V solar store that has been around for ages! DC to DC Chargers and more!
renogy.sjv.io/n1VjXx
Rich Solar
Renogy's biggest competitor! Similar products, but at a better price:
richsolar.com/?ref=h-cvbzfahsek
Battery Hookup
Cheap cell deals
bit.ly/2mIxSqt
5% off code: diysolar
Contact Information:
I am NOT available for personal solar system consult! If you wish to contact me, this is my direct email: [e-mail]
Join the forum at diysolarforum.com/ if you wish to hang out with myself and others and talk about solar
FTC Disclosure Statement and Disclaimers:
Every video includes some form of paid promotion or sponsorship. Some links on this youtube channel may be affiliate links. We may get paid if you buy something or take an action after clicking one of these. My videos are for educational purposes only. Information is subject to change/update at any time. Electricity is DANGEROUS and can kill. Be smart and use common sense :)
DIY Solar Power with Will Prowse is a participant in the Amazon Services LLC Associates Program,
An affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com

[@WillProwse]

Tools mentioned in the video (affiliate links): Best Value Torque Screwdriver: amzn.to/3DEMqwb Torque Wrench: amzn.to/3sEpuH8 (there is an insulated torque wrench out there, but it costs 20X as much (not joking). The options above are great for the price) Basic Electrical Tools that I recommend: www.mobile-solarpower.com/tools.html 0:00 Intro 0:14 #10 1:21 #9 2:53 #8 3:56 #7 5:36 #6 6:54 #5 8:51 #4 9:49 #3 12:15 #2 14:29 #1 *Does off-grid solar confuse you?* Check out my DIY friendly website for solar system packages and product recommendations, and so much more! www.mobile-solarpower.com *Join our DIY solar community* #1 largest solar forum on the internet for beginners and professionals alike: www.diysolarforum.com *Check out my Book* Best-selling and beginner-friendly guide to 12V off-grid solar! amzn.to/2Aj4dX4 If DIY is not for you, but you love solar and need an offgrid system, check out Tesla Energy! They will price out a system and get your house offgrid: ts.la/william57509 *My DIY Solar Equipment Recommendations (Constantly updated! Check here first):* 12V/48V Lithium Solar Batteries: www.mobile-solarpower.com/solar-batteries.html Complete Solar System Component Directory: www.mobile-solarpower.com/solarcomponents.html Complete 48V System Blueprint: www.mobile-solarpower.com/48v-complete-system-blueprint.html Plug-N-Play System Recommendations: www.mobile-solarpower.com/full-size-systems.html Complete "Add to Cart" 48V System Kits: www.mobile-solarpower.com/complete-48v-solar-kits.html DIY Friendly Air Conditioner/ Heat Pumps: www.mobile-solarpower.com/solar-friendly-air-conditioners.html *My Favorite Online Stores for DIY Solar Products:* *Signature Solar* Offgrid One-Stop-Shop. Best Value 48V LiFePO4, Victron and Offgrid Specific Heat Pumps: www.signaturesolar.com/?ref=h-cvbzfahsek *Current Connected* SOK, Victron, Mr.Cool Heatpumps and High Quality Components. Fantastic customer support: currentconnected.com/?ref=wp *Litime* My favorite 12V budget battery!: www.litime.com/?ref=XBIA62RFcalHns *Epoch Batteries* My favorite high-quality 12V battery: www.epochbatteries.com/products/12v-460ah-lifepo4-battery-ip67-heated-bluetooth-victron-comms?rfsn=7352625.50494d *Renogy* A classic 12V solar store that has been around for ages! DC to DC Chargers and more! renogy.sjv.io/n1VjXx *Rich Solar* Renogy's biggest competitor! Similar products, but at a better price: richsolar.com/?ref=h-cvbzfahsek *Battery Hookup* Cheap cell deals bit.ly/2mIxSqt 5% off code: diysolar *Contact Information:* I am NOT available for personal solar system consult! If you wish to contact me, this is my direct email: [e-mail] Join the forum at diysolarforum.com/ if you wish to hang out with myself and others and talk about solar *FTC Disclosure Statement and Disclaimers:* Every video includes some form of paid promotion or sponsorship. Some links on this youtube channel may be affiliate links. We may get paid if you buy something or take an action after clicking one of these. My videos are for educational purposes only. Information is subject to change/update at any time. Electricity is DANGEROUS and can kill. Be smart and use common sense :) DIY Solar Power with Will Prowse is a participant in the Amazon Services LLC Associates Program, An affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com

[@ThePracticalProgressive]

Also if you’ve got links to the torque wrench and screwdriver that would be awesome!

[@WillProwse]

Just added some links above for those tools. Good idea

[@LordSlag]

"..titan it properly..." I only joke in a good-natured fashion. You're videos are GREAT for people like me not electrically inclined. Because of you, my system is the envy of the community.

[@mikefranks4528]

@@LordSlag I say it the same way and I get friendly teased about it. LOL

[@LordSlag]

@@mikefranks4528 😋😋🤗

[@SFFrog]

I'm a retired electrician and can say that this was an excellent video. You don't just say what to DO or NOT DO, but, most importantly, you explain WHY. You are also teaching "good practices". I am subscribing just because this video was so good that it will help me explain things to others properly, including being more concise. Thank you for exceptional work. 🙂👍

[@MaritimeUnprepared]

I'm also a retired tradesman and this kid is #1. I love his work ethic and his positive attitude. He's probably the nicest guy I've ever met on the KZbin

[@adelaidemarie]

Caused to to buy his kindle book

[@InspiredScience]

*_Top 10 Mistakes Summary:_* 14:29 1 - Loose terminals 12:15 2 - Using the incorrect tools (emphasis on wire-strippers, crimpers, insulated tools) 9:49 03 - Improper Wire-Sizing 8:51 04 - Messy, unorganized Wiring 6:54 05 - Solder large lugs (use only mechanical connections) 5:36 06 - Using CCA (Copper Clad Aluminum) cables; Use only pure Copper 3:56 07 - Using low qaulity circuit breakers 2:53 08 - Building a System that cannot be Scaled 1:21 09 - Not enough batteries or solar panels 0:14 10 - Connecting a solar string to a device without checking the voltage

[@tex24]

Thank you!

[@lua-nya]

Some of these, while disadvantageous, I wouldn't always count as mistakes. But then I notice the word beginner and checks out.

[@tanioraaura1274]

Thank you for your time and effort to display Time stamps.

[@VinceBadovinatz88]

@@tex24 I know right man there's so much stuff to know. It's so difficult to put together a system.

[@ratonjj]

Thank you - saved me 17 minutes :)

[@witness1449]

My first DIY system is working great. I over built everything especially the wire size. I built my system at about 50% of the capacity of my inverters. As a beginner I am one of the old school guys that soldered my battery cables. Used to do that as a heavy equipment mechanic 30 years ago. I never had one failure, but will probably invest in a crimping tool. It took me 18 months to save money and then install my ground mounted system. It was a big investment, but has been working flawlessly for 4 months now. It saves us about 40 % on our electric bill. I am only using about 50% of my battery each day, and in an emergency could probably get about 30 hours out of my small system. Definitely adding more battery backup as soon as funds are available. Since we're retired and with limited income, it's difficult to have enough funds for large projects. Adding 10kw battery backup would be extremely beneficial to our system. At least we have a small emergency backup that we use everyday. I know that if I had the funds I would go completely off grid. This solar power energy is addictive! YOU JUST WANT MORE POWER. Everyone I watch on KZbin has increased their systems at least twice. Will, I appreciate your videos and applicable information on solar system and products. I used several valuable resources and information that you provided in the past 3 years. Even at 71 I'm still learning and exploring new opportunities to be more self reliant and independent Thanks

[@andrew_koala2974]

Reasonable writing ability - Your score 7/10 -- I use KZbin comments for my Students to correct. I now reach English and History - following a 30 year Military Career - AIR FORCE -- Your text corrected and edited" and formatted paragraph text applied My first DIY system is working great. I over built everything especially the wire size. I built my system at about 50% of the capacity of my inverters. As a beginner I am one of the old school guys who soldered battery cables. Used to do that as a heavy equipment mechanic 30 years ago. I never had one failure - and will probably invest in a crimping tool. It took me 18 months to save enough money to install my ground mounted system. It was a big investment - and has been working flawlessly for 4 months now. It saves us about 40% on our electricity bill. I am only using about 50% of the battery capacity each day and in an emergency - could probably get about 30 hours out of my small system. Definitely adding more battery backup as soon as funds are available. Since we're retired and with limited income - it's difficult to have enough funds for large projects. Adding 10kw battery backup would be extremely beneficial to our system. At least we have a small emergency backup that we use everyday. I know that if I had the funds I would go completely OFF grid. This solar power energy is addictive! ONE JUST WANTS MORE POWER. Everyone I watch on KZbin has increased their systems at least twice. Will, I appreciate your videos and applicable information on solar system and products. I used several valuable resources and information that you provided in the past 3 years. Even at 71 I'm still learning and exploring new opportunities to be more self reliant and independent. Thanks TIPS: Use and instead of but - unless describing a NEGATIVE aspect. Learn to use paragraphs - and not continuous lines of text Other wise not too bad -- Also note that there is a difference in meaning between ON OFF and on off They are used in entirely different contexts. ON OFF is used in relation to switching -- That is why you see it written in the ALL CAPS iteration on switches. -- The history of it is too lengthy to describe here. and beyond the scope of this comment. Good luck and good bye

[@twilburn10]

@@andrew_koala2974 Maybe you should correct and edit your own post before attempting to improve others. :)

[@andyball2911]

@Andrew_Koala Perhaps you could ask your students to find the 5 errors you made in your short intoductory paragraph (below)........There are further various errors that you have made in your purported correction of the original post but I don't have the time or inclination to correct you as a reacher (sic). As much as I am tempted I will refrain from scoring your 'Reasonable writing ability', maybe you could let your students do so. Reasonable writing ability - Your score 7/10 -- I use KZbin comments for my Students to correct. I now reach English and History - following a 30 year Military Career - AIR FORCE -- Your text corrected and edited" and formatted paragraph text applied

[@mark98115]

I agree completely. I see really many examples of horrendous English on the internet but this particular post was not one of them. Maybe all the "low hanging fruit" has made me more tolerant. LOL. I will opine on the fact that the corrector's writing style was rather awkward.

[@robertsmith2956]

@@andrew_koala2974 So how many students failed your teach line? As for History.... What did the founders do with the Declaration of Independence after they signed it? Did they send it to George by courier? Did they give it to the first brit they saw? Did they just start shooting brits till George figured sumthin be up? That is the problem with school, you don't know the questions to ask till you are out.

[@baloolamo1725]

As a controls engineer - Almost EVERY time I go in the field for construction inspections, the #1 problem is improperly seated and torqued cables. Will hit the nail on the head there. We formally call the pulling a "tug test". Do one after terminating anything - making sure everything is de-energized.

[@Chris_at_Home]

I worked in telecom as a tech and we used insulated tools and did annual torque checks of all the hardware. The last place I worked before retirement had 7 48v battery banks. Our load was about 1400 amperes. I have a small system at our remote cabin where I run a 48v battery bank with solar and inverter. I also have a 12v system for lights. I torque my stuff out there also. I also use the same method for preparing the connectors that we used at work.

[@W-4-Z-D]

One has to wonder why they give torque values for rotational terminators but do not give lateral separation limit tolerances for inline junctions.. after all, a "tug test" is much more likely to fail when preformed by the Hulk (or Arnold Schwarzenegger) than if done by my 5 year old niece ;)

[@Knight805]

I do controls too. I have found factory landed wires on a big chiller landed on insulation. Wires inserted too deep and tightened on insulation and system wouldn’t run. That was fun to find.

[@Blazer-fp8fo]

@@Knight805 I thought I was the only one. New battery cables for a car. Direct from Ford OEM. They didn't strip the insulation at all, just crimped the connector on. Also made me wonder if they were using a correctly sized lug since it fit over the insulation? Mine never have enough room for that.

[@rogergregory5981]

I've come across cables just falling out of terminals aswell , just people being lazy and in a rush some just don't tighten down very much ,technical term is limpwristted

[@4philipp]

You forgot the two most important ones A) get reacquainted with the basics of (solar) electricity before a project B) find or make a cheat sheet with checklist to keep handy when doing a project. C) start with smaller project that don’t hurt as much financially in case of mistakes. People, including myself need these refresher videos frequently

[@orionred2489]

agreed! I'd add to make sure that you are watching very recent videos. It seems like the tech is changing so fast that a 5 year old video is outdated. It's like cell phones.

[@jeffwarren8154]

I retired from large power plant power generation. There has been more than one transformer fire due to terminals loosening over time due to the thermal cycling. All of Will’s points in this video are worth watching periodically.

[@tristanschaper281]

I've been doing marine wiring for over 25 years and off grid solar for about 15 years, and when I started solar wiring, I used all of my marine wiring experience to do proper jobs. I've seen so many DIY off grid solar installs that are cobbled together and basically fail on every point your made in your video! Honestly, your video is 100% accurate on all points. I can't find a single thing to dispute. You just got another subscriber - me! because we are always learning. Some of my biggest pet peeves - soldering of any kind, on boat or solar wiring. And buying cheap off-brand crap, like breakers, bus bars, fuse panels, wiring. When someone asks me to "redo" their solar setup, or install new, I often will send them an exact list of all the major parts needed, like breakers, bus, fuses panels, cables, cable ends, crimp heat shrink marine connectors, charge controller, etc, and let them review it online and even but it themselves. If they balk at the price and/or look to use cheap alternatives, I may refuse to do the job and I tell them they can find someone else.

[@46bredo]

Fine some one else ,,agree

[@vaughanlancellas495]

Could not agree more, when you do a project on the cheap it will ALWAYS comes back and bites you in the rear, ALWAYS!!!!! Wait till you have enough funds to do the project correctly with the correct parts or it will end up costing you double if not more!!!!!!

[@scothunter3221]

I totally agree with you on the comments about soldering. For many years , I lived on a boat and did all my maintenance myself. To do things right and stay safe I took a course on marine electrical systems, taught by a professor from the University of Washington, who also taught the Coast Guard, the guys who are inspecting the boats. he said that in a marine environment that soldered connections are extremely subject to mechanical failure from all the motion. The only place for the soldered connection was one that was totally and safely secured against any type of movement. Now that I’m retired and live in a “land boat” (RV) I follow the same practices, thinking that the vibrations from the vehicle can probably do similar damage is the vibrations on the boat. I realize that many of your viewers are thinking of a fixed base, home installation where the only movement may be earthquakes, and I am honestly not knowledgeable about that, so I’m mostly talking to those installing into vehicles of some sort. Regardless, your explanation says why not to use solder are very convincing.

[@orionred2489]

Just the mild heating of a wire from current can cause expansion/contraction. Or even day/night temp changes.

[@TheRadconranger]

please continue these instructional videos....you have helped so many folks and I have no doubt you have save saved many lives .your knowledge &your ability as a instructor a blessing to all of us " newbies " thank you!

[@TheRadconranger]

I usually do

[@ronmiskin1194]

I agree completely. About to start my first system, and have learned so much from Will. The channel is awesome and so much information.

[@ToddLarsen]

I wonder how many times I'm going to be pausing the video and running out to see if I made any of these mistakes lol Thanks for sharing and as always keep building 👍

[@m7f7m7]

I am educating myself in solar and off grid living and I'm sure you've heard but just in case I will reiterate the fact that your presentations to me are the pinnacle of educational videos that I have viewed! Very in depth, easy to follow and comprehend as well as confidence building. Thanks for the education!

[@rebus570]

I always use a conductive grease in my crimps, it doesn't take much don't over do it, but it adds a corrosion protection to the joint. I even use it on small stuff, it really helps on outdoor or buried connections.

[@OnHoldAt50]

As an advanced electronics technician, I don't normally comment on other techs videos. But in this case, I really appreciate how well thought out your production was. Your audience was for the startup crowd, but sage advice for the advance installer also. You use that crimp tool every day? Makes me think you do installations for more than friends. -earned my subscription. Looking forward to viewing more of your videos.

[@MichaelEricMenk]

Also: dubble check polarity.. At work a contractor got the polarity mixed when parallel connecting two 400V battery bank, short-circuit the now 800V battery.. The connectionbox exploded throwing the contractor across the rom, and started a fire. The incident took down the server room, effecting the work of 15-20 thousand people.... Due to the safety equipment, the contractor escaped relatively unharmed...

[@leonardkellum6984]

Plumber disconnected a pipe without turning off upstream, janitors mopped but women's bathroom was flushed.

[@sevans66]

Will... YOU ROCK! Thanks for just keeping it real and teaching us all, sometimes we need a little extra info and you provide it.

[@trutwijd]

I'm a beginner for sure, researching all this stuff for an off grid setup. Thanks for all your help!

[@kapegede]

No. 5: As an electrician I totally agree with you! In school they warned us about another point: solder gets soft over time and starts crawling and the contacts get loose and corrosion appears within. So, never solder when you can crimp!

[@jeffwhite3021]

Trojan recommends soldering battery cables.

[@john_in_phoenix]

Totally accurate.

[@john_in_phoenix]

@@jeffwhite3021 Trojan is wrong. I live in Phoenix and it will easily exceed 150 degrees under the hood of my car during the summer. Many types of solder melt as low as 165 degrees. In particular avoid any solder with bismuth as part of the alloy.

[@ewe2b]

I agree. I once did pull out tests of both molex crimp connections and soldered connections and the pull out force of the (properly) crimped connections were greater every time.

[@jeffwhite3021]

@@ewe2b It's about maximizing conductor contact area in the connector. They are suggesting and providing evidence that crimping and then flooding the joint with solder is best.

[@seattleboatguy]

I'm familiar with the torque wrenches that use sockets, but did not know they had torque screw drivers. Your videos are always interesting. Thanks.

[@iqvoice]

Wiha makes an insulated torque drive/bit-set specifically for working with electricity

[@dongorsegner4607]

Thanks Will, I have learned so much from your videos. Completely rebuilt my 1978 18’ fifth wheel electrical system, your insight was so helpful and reassuring.

[@choclaholic1]

abolutely love having the technical reasons why for each mistake. Learning many new bits from your videos, thank you.

[@donnalutheran6335]

72 years young grandma here enjoying your videos. Especially love the rant one. I'm from Pittsburgh pa and have a jackery explorer 300 and a 100 watt solar panel (my toy). We don't get half as much sunshine now that it is fall but that explorer fully charges in 3 hours under full sunshine. I am pleasantly amazed at the sunshine power. I use my power supply to plug in a lamp where we have no grid wiring and a few other things. Waiting until I understand a lot more of this stuff before moving on to something more challenging.

[@stevenlloyd3982]

Remodeling my first Rv and your videos were very helpful! Thank you!

[@Cotton2Ennis]

Every subject could use a top 10 and I believe everyone can benefit from this video. Thank again for useful illustrations and direct to the point comments that are easy for beginners to understand.👍👊

[@kevinkoestler]

Will, thank you so much for all your thoughtful consideration regarding beginner mistakes. (Doing everything right the first time eliminates worry and feeling like you have to constantly focus on and reconsider "shortcuts" that will inevitably cause problems.)

[@91CavGT5]

I crimped several cables 10 years ago in both 4 gauge and 1/0 gauge. I used a hammer crimp and always was concerned about the quality of the crimp as well as the longevity of them. Earlier this year I decided to cut one of those old cables apart to inspect the cable and crimp. I made a video on it and found after cutting the cable and terminal apart that it was an amazing crimp! The heat shrink also held up great with only minor surface corrosion of the copper wire(yes, this was OFC copper cable). Before I destroyed the wire, I checked the resistance of the wire with my Fluke multimeter and resistance was VERY low! One other thing I like to do after I build a system is check the resistance (ohms) in the cabling and connections with my Fluke. This helps to find problems before they rear their ugly head.

[@cthncthn7405]

Awesome! More videos like this please aimed at beginners. I already rewatched and liked your beginner videos 20 times

[@WillBelden]

I have that same Blue Sea fusebox. I love it. I bought it during an "over-engineering" phase for my motorcycle (pre-RV). But I loved it and hung onto it; and it found a great life during a big DC wiring project in the rig.

[@justinwinkelmann2881]

Glad to see more new videos from you. I work on telecom power systems with large battery strings (48V with 5,000A+ discharge capability) and I agree with all your points, especially proper torquing of terminals, thermal inspections, using insulated tools, and having the proper tool and knowing how to use it! I'm hoping to see new buyer's guide/showdown videos from you for MPPT's, panels, and batteries. I've watched all your old ones, but there's so many new devices out there now. I'm building an off-grid system for my RV and your channel has been a great guide!

[@bernardb8045]

Perfect timing Will! Thank you as always

[@rickharold7884]

Right on man! I’ve done all those things at one time or another and now always double check everything I’m doing great video thanks

[@adventuresinblackduck9539]

I know you have helped me build my first solar system. I was considering soldering some large conductors until I saw this video. Thanks for all the great tips.

[@scottd143]

Thanks Will, I am about to start my solar build for my 5th wheel. Nothing fancy but I am using your book and this was a good refresher.

[@mondavou9408]

Thank you Will. You're timing (for me anyway) couldn't have been better. I'm sure you just saved me a few blunders. My two (of course way more than that) biggest weaknesses are sizing charge controllers and breakers/fuses. I appreciate you spending some cycles on those topics. It was helpful. P.S. The wire strippers were new to me too.

[@Hobbies4Hire]

Great job on the video Will! Thanks for making it.

[@amsoiladam]

Very good advice will. I just built my first system this year and watching your channel is what gave me the confidence to do it

[@dennispatterson1684]

Exceptionaly helpful. I lived ogf grid for 8 years and am currently building my new location's off grid system. I made 4 of the 10 mistakes the first time around.

[@mcasteel2112]

Awesome your revisiting some beginner things. I bought the book from Amazon last year and highly recommend it to everyone young and old.

[@richardjensen7186]

Great video! I would only add to the torque point this: Tighten to rated torque, then loosen a bit, then retorque to spec. You'll be surprised how often the connection "snuggles down" a bit more at the same torque once you do this. The screw or nut will often (more often than not) rotate a bit more to reach the same torque than it did during the initial tightening-to-torque. Such double-tightening makes the connection a lot more reliable over time!

[@dbf1dware]

That is a great tip. Thank you.

[@colemcleod941]

That is old school Wisdom you're sharing, I've forgotten that one. That tip alone will save so many people the headache of Loose connections down the road. Please comment some more - I know you got some more old school wisdom to share with us.

[@fu4616]

@Marco Polo Adding any lubrication will alter the torque.

[@genespell4340]

​@MarcoPolo1776this is news to me and I don't recall any mechanic that I have worked with doing that. I will definitely give it a try.

[@lunatik9696]

Over torque is an issue also. One worker used to super torque everything. Soon after equipment connections started failing b/c the connection was cracked/ broken. When wiring a service panel, it is recommended to recheck the connections 2 weeks after the initial install. Very few do this, but when I do, there is always at least 1 or more connections that need retightening. One time in particular, I averted an almost fire from a loose connection. I smelled something like plastic melting but could not find it. When I checked the service panel, one of the wires was a smidgen loose. I suspect when it heated up the looseness became more apparent. Easy fix, once you know what is wrong.

[@viktorluk482]

I am currently a beginner,but thanks to your videos it became much clearer to me how solar systems work.I have completed my small load solar project for example outdoor light and garden fountains without a problem.

[@dgb5820]

I regarded myself as intermediate now after watching your video I feel like a beginner. There’s so many things that you have packaged into this video. Really appreciate it the revision.

[@pauloconnell7668]

Will, this is one of your very best, if not the best. Thank You!!

[@stephenmayers4033]

Great to get back to basics Will, I found this very helpful. Greetings from UK.

[@CountryBoyMoto]

I hate standard flat head torque screws like what’s on the solar charge controllers, I wish they were Allen heads or something else. I can’t tell you how much I appreciate your videos. Keep them coming please.

[@stevesdayoff7889]

thanks for the reminder! I will be inspecting my wiring tomorrow

[@careygagnon5853]

It got a lot of this from Will's other videos while I was researching my first system. My 4 x EG4-ll 48v batteries are connected to the rack bus bars with 1/0 cables. From the positive bus bar to the T Class fuse is 4/0. From the negative bus bar to the Victron shunt is 4/0. From the shunt and the T Class fuse, to the 250V DC rated Fuji breaker, 4/0. From the Fuji breaker to the positive and negative battery terminals on the MPP Solar LV 6048 also 4/0. Thanks for the great info Will.

[@modernnomadtechnology9252]

Thanks for explaining about loose terminals. I've been building my own systems for years, and thought that the loose terminals were caused by vibrations and movement. My system moves five times a year. My Victron CC recently had an overheat warning, and it was partially due to loose terminal connection. Keep up the great work. Some of your newer builds are far beyond anything I will build in the near future. Don't forget about the smaller systems! 1kW pv, 2 kW inverter, 14 kWh LiFePo4, off-grid yurt.

[@jmohn6]

I have been looking at your videos for a long time and I appreciate them all and like that you have gone through all the testing you have done

[@ronmorrison1964]

Thanks for your info!

[@acinfla9615]

Once you start generating your own power the first thing you will notice is how much each device uses. I replaced several older devices just for the reduced wattage. A watt meter is your best cheap investment and you will be surprised what your use is. If you can conserve it you don’t need to generate it , I’ve been watching the evolution of solar equipment for years and it is amazing how the price and availability make it easier and affordable for you to set up a system. I always research your videos before even considering purchasing any solar equipment . Thank you for the video.

[@bitworkx6028]

Im wanting to do things correctly in the future Where are the torque values located on switches, outlets, etc? Could I use values for what a particular bolt size and grade is rated at or is there a torque chart for electrical connections out there somewhere?

[@jbennett3578]

I love my watt meter. Especially for my computer, it helps figure out how much power I'm using with different settings. It doesn't matter much in summer, but in winter I need to keep the power consumption low.

[@chrismullin8304]

No more toast for you! 😅

[@patrickbuick5459]

I recently bought a wattmeter to do just that. My consumption wasn't high, but higher than I thought it should be. I'm still making the list of what uses what. Too many plugs, so little time!

[@MarkfromArizona]

Excellent ! There is always something to be learned from your videos.

[@JLFamilySong]

Absolutely correct on the no soldering of lugs for #5!!! Well said Will!

[@dfox344]

Thank you for sharing Will.

[@arleneallen8809]

A common one I've seen helping friends is not carefully labeling both ends of wire runs. Color coded wires are always best, but a lot of purchases just go with the straight black or grey. The red, white and black should be applied to both ends. Best with shrink tubing.

[@wallacegrommet9343]

I’ve made that mistake and regretted it to great expense

[@Roy-ij1wq]

I do the same thing. I slip a piece of colored heat shrink tubing on the ends of my wire runs to keep things straight since the only spooled wire I have is black. On rare occasions I've used more than one color primarily to identify switch feeds to different lights.

[@brandontanner97]

Colored electrical tape would also work for identification.

[@cowboymcq6711]

Your the man WILL keep the great informative videos coming dude 👍🏼❕

[@twashburn1971]

Great video, the attention to detail and level of explanation are greatly appreciated. Keep up the good work!

[@jukingeo]

I am putting together my first system and this is fantastic! Great info and superb presentation!

[@MyWasteOfTime]

From what I've seen in my 15 years in solar, #1 should be "Under Sized Cables"

[@arminius301]

I know many of us use XT60 connectors for solar panel hookup (Will uses those on some of his panel arrays) and they need to be soldered. There are also better options for solar panel connectors than XT60. Soldering takes too much time anyway since those XT60 plugs are so freaking small, a good crimping tool makes the job extremely easy for the crimp-type connectors. I'd also have added another common mistake beginners make: Always follow diagrams to the letter! Excellent video once again with lots of useful info to ponder! Thanks Will!

[@Five0Music]

Great information, Will. It’s videos like this that keep me referring people to your channel. Thanks for the useful content!

[@peterhuffam1006]

Thank you for your excellent videos, Will. I learn something every time I watch your presentations. Please keep up the great work!

[@simon359]

Thanks Will, you do a great service to the people!😜🖖

[@Jorkofvich]

I've definitely had connections loosen on my solar disconnect. I do check them when I remember, but probably go longer than i should. This is great info will!

[@mrf5347]

I use my smart phone calendar as a preventative maintenance log, setting recurring notifications as a reminder.

[@GaryDerry11]

Thank you for being so competent and clear - Great Work as usual!

[@22dipthisstick]

Your guys' forum community is awesome, thank you.

[@edwardlulofs444]

Yep, all good advice. Good tools, do it right, minimizes problems. Power electricity is different than signal electricity. And all of you physics explanations are correct. Thanks.

[@joebass5163]

Make sure the system is de-energized before yanking to check for loose terminals!

[@hardyvonwinterstein5445]

Fantastic knowledge, shared without fuzz. Who wouldn't want that? Keep it coming Will.

[@SteveSnowman]

Good stuff. Coming from 4 decades in the electronics industry, everything you said is spot-on. I'm designing a PV system and so I'll Subscribe. Thanks.

[@FarrellMcGovern]

Another important thing to do with a system is to DOCUMENT IT! It may all seem logical and meeting your needs when you install it, but six months or two years down the road you have to repair something, or want to upgrade, and you won't remember why you did things, or how they are routed, or what they worked around. And unless you think that you will own the set up for the rest of your life, some day you will sell it, and being able to give the next owner the documentation might make the difference between a sale or no sale.

[@frankhage1734]

As someone who's built and operated a series of tiny off-grid solar systems for my cabin's stereo and phone charger over 20 years, my biggest difficulty has been getting good crimps and screw connections. I've recently upgraded crimp tools and will never solder a connector again.

[@boxster1970]

Well said Will!! 30 plus years in Aerospace industry working with US Navy, Boeing and NASA - everything you say in this video is spot on - especially the part about NOT soldering large lugs.

[@itsallfabrication]

Loads of good info Will, much appreciated.

[@OWK000]

The concept of a scaleable solar system is important. A video that would expand on this would probably be helpful, especially if you are patching together different sets of panels that aren't perfectly matched. Trying to match up balanced batches of panels is probably the way to go. I did see the video where you chain together a bunch of varied server rack batteries. (I probably should watch that again.).

[@dennisferron8847]

Your point about crimping instead of soldering is well taken. I was one of those people who wanted to solder everything whether it was appropriate or not. I had a car that I repaired the battery cable with a lug which I soldered on. It kept failing (mechanically). Eventually I realized, hey dummy, it's because you used a soldered connection for a giant lug (especially in a vibration environment).

[@dmv_p]

Thanks Will I really appreciate your channel. Getting ready to start my first solar panel home project.

[@jminnee]

I have checked my (Chinese) cables which came with the inverter right away and you are so right! These are CCA cables. Thank you for the heads up!

[@mrf5347]

1989 - 1998, USN, ET1 SS, and 5 years building emergency vehicles, communication centers, radio tower work. Will is 💯 %correct !!!

[@Merlinsluck]

1980-1990 PH2 - USS Jason AR-8. Learning tons from Will.

[@mrf5347]

@@Merlinsluck Thank you, and all those who stood watch, so our land of freedom would continue, until I could relieve the watch. Now many young stand the watch. I pray for them all, and my Daughter, stationed in Germany, and her husband (i now have a son) in the 82nd Airborne. God Bless America

[@Huskyresqr]

'65 - '69 AT2 PATRON 10 HUNTED RUSKIE BALLISTIC SUBS..The kid knows what he's talking about...

[@jbennett3578]

UHF radio repairman in the Marines, '77 to '81. To be honest, the gear I worked on was so old it was more steampunk than electronics, but I picked up a bit of useful information.

[@BlackheartCharlie]

Great video! I'll second the use of Blue Sea marine-grade components. I've been a marine electrician for 25+ years and use their products exclusively - never seen one fail. They're expensive, but when you buy quality, you only cry once.

[@CharlesLeaverSouthAfrica]

"when you buy quality, you only cry once" -- I love this :)

[@jeffnelson8285]

100% agree...buy nice or buy twice

[@PackBjammin]

Comment of the day 😂

[@bill2292]

One of the top 5 videos you've ever done Will! Thanks.

[@PaulBarwick]

Thanks, Will. Great points and excellent reminders.

[@ElectroTree01]

Interesting. I revamped my friend's solar panel and upgrade from a 40ah lead acid to a 100ah LiFePo4 with a great Renogy MPPT and added a small inverter to run small lights and fans. The loosening on cables(And other hardware) is definitely something I've experienced. Especially hardware on wood.

[@RayBuildsCoolStuff]

Great video Will. Thanks so much for sticking to your guns on not soldering large lug connections. I get comments on my connection video from people that try to sound like they are professionals and they recommend soldering and it makes me worried that someone will believe them and create a problem for themselves. Keep up the good work.

[@BusDriverRFI]

To solder or not to solder is not something I will argue. However the logic behind it does not work for me. He says it's because of "dissimilar metals" and calls these silver lugs "copper" when in fact they are tin plated copper. That is what I call "dissimilar metals" without soldering. The high temp solder is mostly tin so if you have tin plated lugs, it's not really dissimilar at that point. I would like to see some data showing a resistance comparison between the resistances of the soldered lug and the non soldered lug over time. It seems the soldered lug would keep oxygen out of the connection better than non solder; keeping the connection from oxidizing. But I'm just trying to learn here.

[@martyn52]

As usual brilliant video. Well done. Keep up the great work.

[@darlingtonjonesimagery9247]

This is one of the most important videos you've done

[@johnsjohnson7677]

Hi Will...I'm heavily invested in you as an intelligent well informed teacher...thank you for helping me learn something new at 80:) We're on Social Security and saving money via Solar is so very important to my family. Have you considered a series aimed at overhead reduction instead of equipment cost, anything to get the electric bill down? I'm a Amateur Extra Class so tech is not a problem. Thanks again my friend:)

[@jackreed1062]

As a licensed handyman with my educational background in industrial mechanics and heating, air. And refrigeration I've had a lot of electrical training, I'm going to install solar on my house watching your videos are priceless I've learned sooo much from sizing my system to all the many options options available what's important for r off grid or s combination on and off grid keep up these fantastic tutorials they help folks then you can believe.

[@gnagyusa]

Great summary. I'm an electrical engineer, but I still had to figure out some of this stuff when I installed my solar setup a few years ago. I'm definitely happy that I over-engineered everything. 2/0 gauge copper wires on the batteries and 4-gauge (vs the recommended 6 or 8-gauge) from the solar panels and no issues. It's hard to find MC4 connectors for 4-gauge wire, though, as it's thicker than most folks use.

[@Electronzap]

Good tips Will! People need to build small systems first and get some experience if they want to DIY. Going to make a lot of costly mistakes if you try to learn everything on a single large project.

[@dubusonrenovationszarius]

Thanks for all your detailed info and video,s , can you show me how do you isolate a geyser and stove , on DB bord , with the inverter wirling connections ro the DB Bord Regards Zarius

[@mesaber86]

This channel is gold.

[@klm404]

You have given me the information and the confidence to build my own system. Thank you, Thank you, Thank you!

[@douglundy5755]

great points here. I have lots of battery cables and should re-do them all with crimped instead of soldier. Goes for most starter and battery leads I see.

[@jeffwhite3021]

Soldering makes a superior connection for obvious reasons but has to be done properly. No need to fix what isn't broken.

[@midwestbest6398]

great beginner vid for sure. any update on the sol ark system your friend was going to install?? been super excited to see it come up.

[@glamperjan]

Once again you are amazing!! Love your videos, Will!

[@hivolco151]

Another great video and teaching! I REALLY appreciate that you explained WHY it is to important to keep it TIGHT!!

[@mrgruisinge]

100% correct on each item. Used to solder till I saw a crimped terminal cut in two. Bought a hydraulic crimper. Have never been sorry.

[@SpartyTime]

What are your opinions on adding dielectric grease to connections? I'm on a sailboat, and I add it to all connections that might see moisture. It is probably overboard, but it helps me sleep at night.

[@frozenfritz]

Very good, clear voice & explanation!

[@Ithiel1981]

Thanks for another great tutorial. I've build my own solar systems before, have one currently as back up, even portátil ones. It is better to read, watch and learn as much as you can beforehand, buy good enough tools and have fun doing it!