RoyPow Solar/Marine/Golf Kart LiFePO4 Batteries

[@WillProwse]

Attention: If you want the cheap price in the video, you have to add the batteries to your cart. Not sure why they did it this way. Links are below: Product Affiliate Links: 12V 100Ah Budget Battery: powerurus.com/products/powerurus-12v-100ah-lifepo4-deep-cycle-rechargeable-battery?aff=2 12V 200Ah Budget Battery: powerurus.com/products/powerurus-12v-200ah-lifepo4-deep-cycle-rechargeable-battery?aff=2 24V 100Ah Marine Trolling Battery: roypowcell.com/products/roypow-24v-100ah-lifepo4-battery-for-trolling-motors-and-fish-finders?aff=5 36V 100Ah Marine Trolling Battery: roypowcell.com/products/roypow-36v-100ah-lifepo4-battery-for-trolling-motors-and-fish-finders?aff=5 0:00 24V Marine Trolling Battery 1:37 Tear Down 8:06 $400 Budget Battery 12:30 $400 Battery Teardown 15:49 Conclusion ~~~~~~~~~~~~~~~~~~~~~~~~~ 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 best-selling, beginner-friendly 12V off-grid solar book (affiliate link): amzn.to/2Aj4dX4 If DIY is not for you, but you love solar and need an offgrid system, check out Tesla Solar. Low prices and great warranty, and they can take your entire house offgrid with their new Powerwalls: ts.la/william57509 ~~~~~~~~~~~~~~~~~~~~~~~~~ My solar equipment recommendations (Constantly updated! Check here first): 12V/48V Lithium Batteries: www.mobile-solarpower.com/solar-batteries.html Solar System Component Directory: www.mobile-solarpower.com/solarcomponents.html Plug-N-Play Systems: www.mobile-solarpower.com/full-size-systems.html Complete 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 Complete 48V System Blueprint: www.mobile-solarpower.com/48v-complete-system-blueprint.html ~~~~~~~~~~~~~~~~~~~~~~~~~~ My Favorite Online Stores for DIY Solar and Coupon Codes: -Current Connected: SOK, Victron and High Quality Components. Best prices and warranty around: currentconnected.com/?ref=wp -Signature Solar: Cheap Server Rack Batteries and Large Solar Panels: www.signaturesolar.com/?ref=h-cvbzfahsek -Ecoflow Delta Official Site: My favorite plug-n-play solar generator: us.ecoflow.com/?aff=7 -AmpereTime: Cheapest 12V batteries around: amperetime.com/products/ampere-time-12v-100ah-lithium-lifepo4-battery?ref=h-cvbzfahsek -Rich Solar: Mega site and cheaper prices than renogy! Check them out: richsolar.com/?ref=h-cvbzfahsek -Shop Solar Kits: Huge site with every solar kit you can imagine! Check it out: shopsolarkits.com/?ref=will-p -Battery Hookup: Cheap cell deals bit.ly/2mIxSqt 10% off code: diysolar -Watts 24/7: Best deals on all-in-one solar power systems, with customer support and distribution here in the USA: watts247.com/?wpam_id=3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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

[@niktak1114]

They fixed it already

[@WillProwse]

@@niktak1114 oh thanks for the heads up, that was fast

[@highlander723]

I've been seeing a lot of Facebook ads for renology's 200 amp hour lithium iron phosphate battery. way overpriced and whenever I ask him what cells they're using I never get a reply. I have also heard rumors that you cannot connect them in series. maybe you can shut some light on this. also you might want to check out the power Queen 190 amp hour lithium iron phosphate battery hobotech recently did a review on it It looks pretty good for the price He didn't do a tear down but maybe you would?

[@dr.projectx5142]

@@WillProwse how much for the one with the destroyed balance battery. Would like to use it for the 12v led acid battery.

[@teslapilotcheapreviews8490]

OK! Lesson learned ! I was kicking myself for a similar mistake. Glad Im not alone

[@wildness01]

As someone who's lived offgrid for 20 years, having temp sensors on the terminals is a really good idea. Can't count how many times a bad connection at the battery caused problems that went unnoticed until it got bad enough that the glow at night alerted me. Battery teminals are a common place for bad connections.

[@WillProwse]

Absolutely. Do you know of any other batteries that have temp sensors on the terminals?

[@johnlockington9872]

Infrared camera or a heat sensing gun is my best friend on my off grid systems. I regularly check terminal Temps and wire Temps on my regular inspections of my system

[@vbdaniel4]

Batrium had them in the past. Though that is not a batterie but a bms... But that was one of the reasons I chose them... Though I didn't have any connection issues so far.

[@cliffbryant9968]

@@WillProwse Victron sell temperature sensors that are battery terminal mounted. I use one in my RV for my solar and B2B system.

[@wildness01]

@@WillProwse nope never seen it before, it's a really good idea and seems to be unique to these. Amazing if they're really Chinese based, seems like most of the time all i see from China is mimicry amazing if they are actually starting to innovate.

[@KeithCarmichaelInFL]

I love it when you get suprised by high quality! It’s so rare to see companies do things “well”!

[@erichconnally5643]

I respect that you still published the video even when you screwed up and let the smoke out; LOL! Part of the definition of craftsmanship is ownership....even when you have an "ugly baby!" This is why so many companies utilize you as a proxy "proof engineer," and why I trust you implicitly! Also, resistance produces heat. I had a professor who stated 99% of all electrical problems are due to "connections." Temperature surveillance at the main external connections, is a brilliant method monitoring basic maintenance!

[@jamest5149]

Good to see a company not just chasing price but also putting out quality, should help the industry in the long run.

[@adjake1]

We’ve been selling the golf cart replacement batteries for a few years now. They do have specialized brackets for the more popular carts. We have sold probably close to 200 with a few failures but not many. Most failures were early on. They do have good support. They have sent a tech to us to repair failed batteries.

[@MrBoondocker247]

Will, when I disconnect things from unknown manufacturers or in language is not familiar to me I take colored marker pans and on one side of the plug I put a line straight across the two pieces that way when I go to hook it back up I can quickly and easily see that I'm putting the right plug in the right orientation in the right place. You might want to consider this when you're doing teardowns and avoid the problem you just had on this Roy Pow battery

[@sharyncomstock7066]

Excellent advice : thanks

[@Vigo327]

One of the problems ive run into is after a long time of doing things well you get so used to just expecting to succeed that you are subconciously sloppy and have to relearn lessons of your distant past.. 😂

[@modernnomadtechnology9252]

I always shoot lots of pictures of connectors during teardown, as well.

[@HeatGeek1]

@@Vigo327 arrogance can be just as much of a impediment as ignorance if you let it. Speaking from experience!

[@billhollingsworth2874]

A Sharpie is your friend, :-)

[@mikerilling6515]

You’re the cool dude we all wish lived next door to us. These videos are GOLD

[@4philipp]

Love the excitement! The marine battery looks really nice. And at $1300 for a 24V 100ah, that is still a super competitive price (compared to 12V 100ah). For a marine battery though … that’s outrageously cheap. Can’t wait for the capacity test. It’s most likely going to pass . Looks like this company makes batteries for industrial and construction equipment and vehicles. That’s a hard environment. I’m not surprised about the consistent build quality.

[@Gold63Beast]

I was wondering why he kept saying it’s so high quality for being cheap at $1300!. But now I see that this niche marine batteries are expensive.

[@4philipp]

@@Gold63Beast yes, a comparable battery would cost $1800 - $2200. And for larger systems, they are custom build to fit.

[@gr0uch02a]

@@Gold63Beast They're really not. I have 2x100AH LiFePo4 batteries for my trolling motor. They cost $700. Don't need the On/Off switch at all. Can buy one for $25. Bluetooth? Why? Any monitor/shunt will tell you how much power you have left. I have gone on 6-7 hours for 2 days and not had to recharge my cheapos. Once, my outboard had issues and I had to troll 2.5 hrs back to my landing spot on the second day and still did not have any issues. 8 months and counting without a single problem. It's pretty though, so I guess there's that. $1300? Pfft.

[@gr0uch02a]

@@Gold63Beast The ONLY thing that makes "marine" batteries any different is how/if they are sealed. The internal chemistry is unchanged. Mfrs know that saying something is "marine grade" commands a premium for minimal effort so they take advantage of that. Suckers beware.

[@sharpx777]

​@@gr0uch02a just curious, is it $700 each? (your 100Ah batteries) and are they 12v? - if so they're more expensive than the 24v from these guys

[@wtmayhew]

That’s a good object lesson: take pictures and label connectors before beginning disassembly. I suspect we all can relate similar experiences.

[@ne14za]

I put a 36v Roypow lithium battery in my golf cart a couple of years ago. I'm very happy with it. I bought a little Genasun 8 amp mppt so I can top off the charge with a panel on the roof.

[@WillProwse]

Very cool!

[@levimiller3108]

@@WillProwse 🕊️🦅❤️I🕺🕊️ REALIZE🕊️I"M🕺🕊️ONLY🕊️NOT ONLY ONE🕺🕊️ HANDSOME BEAUTIFUL GOODLOOKING🕊️COWBOY🕺🏇🕊️GUY🕺🕊️🦅🕊️WOW🕺🕊️🦅WELL SAID🕊️🦅👍✌️🏇🙏

[@paultaylor7691]

It appears it's been a while since you've been impressed by new products & your enthusiasm is contagious! All beyond my capabilities but very interesting to watch & learn. Thank you for the exceptionally clear video.

[@gregpeterman1102]

Yes I worked on golf cars for a living, I want to know more about that! You may never need new batteries again.

[@CaptureAVtube]

Really good to see that you didn’t hide the fact that you screwed up on reconnecting the BMS. I appreciate such honesty. Keep up the excellent work. I look forward to seeing future reviews on Roypow.

[@robgeach8073]

Getting into solar have been watching your videos for a couple years now. Not only funny sometimes but a blast to learn and easy to learn thanks for all you do keep up the great work !!!

[@Yupmoose]

I am so envious of Will's workshop. Someday maybe we will get a tour... And before I got into solar power and batteries this wouldn't have been on my favorite view list but I absolutely love battery reviews now!!

[@chein33]

So glad I found your channel, starting a van conversion with solar. Your book is on the way too. 😊

[@SteveInPalmSprings]

Your integrity is outstanding. Few folks show their mistakes, but you have the confidence and presence to do just that. Great video. Keep up the great work.

[@sailingkoko]

Just bought a roypow 30 amp battery. The battery I received is below 3 volts on delivery, and obviously used. It has abrasions and residue on the face of it.

[@we4selradio591]

I've had one of their 48 volt 100 amp golf cart kits in operation since the first part of the year and it is awesome. I run the snot out of my cart and this thing just keeps going.

[@SkypowerwithKarl]

Will, what would have been interesting is to have looked for heat on the outside of the case where the bms resides. That goo on the heat sinks may actually move the heat to the outside world instead of a trapped dead air space within at best heating the batteries. I don’t know if you have one, but I highly recommend the FLIR thermal cameras. I use a dongle for the iPhone and it works great.

[@charlesrichards5389]

That's what I was thinking. Since everything else was so well designed, _maybe_ we shouldn't second-guess their way of dissipating heat.

[@katherinedai5911]

We specialized in LiFePO4 battery for over 14 years, we are proud of providing premium 12v 24v 38v battery with an effective cost to our customers, if you have any interests welcome to share with me.

[@smbrob]

Will did make the magic smoke escape. That is a talent I would never have suspected from him. 😂

[@pferris3591]

Proof that Will is human, and not a prototype Terminator after all. Despite what you humans say. Seriously. If you hear anyone say otherwise report it at once to skyguynet at once. We offer a cookie as compensation.

[@stevemacdonald3522]

I bought an Epoch 36100H for my golf cart. Same packaging as RoyPow from the outside. I has a heater so I can charge below freezing. They advertize 100 Ah but in reality it is a 105Ah. nice to see them underestimate in their adveertizing instead of the other way. On /Off switch. Wifi enabled . Meter that alarms when you get low in power and a second alarm so you won't run out of power getting home. It can run up to 120 amps continuous and 200 for a very short time. it works for my 2002 EZGO TXT series cart with larger tires. Thanks Will for letting me see the quality of the next generation 36v golf cart battery.

[@quartamile]

Will, thank you so much! This quality and price is exciting. Looking forward to your roypow follow up tests. Blessings 🙏🏽🕯️

[@narrowstripsawing9595]

I'm hooked on your channel!! It and you are awesome for doing these videos and teaching!!! I'm wanting to build a solar system for our house and you have been a blessing!!! Still learning and researching to understand it better and your channel and knowledge is outstanding!!! Thank you very much!!!

[@katherinedai5911]

Hi Narrow, may i know if you need LiFePO4 battery for energy storage system? We specialized in LiFePO4 battery for over 14 years, we are proud of providing premium battery with an effective cost to our customers, if you have any interests welcome to share with me.

[@mangomcpoo475]

Finally a brand you've done that exists here in Australia! (update it's only really the golfcart ones, and they are like $4k bummer)

[@BeachDaddy74]

I have a Golf Car (old 48v Club Car DS) & a RV @ the beach. I keep my Golf Car in my 12 X 16 shed. It would be awesome if you could use your ingenuity & know how, to create some videos, where you teach us how to make 48V off-grid systems from a 48V Golf Car. Don’t forget to add some solar panels to your roof to plug into mix as power supply. This would be relevant for those of us that have beach property part-time, full-time, or live around golf courses. Love your show… even though I only understand 1/2 of what you saying 😆….

[@modernnomadtechnology9252]

It's really quite easy to build a 48v solar charger. All you need is a few solar panels in series and a 48v capable charge controller. Victron makes many charge controllers that go all the way from 12v to 48v. I use one. Right now I'm running 12v, but if my inverter ever burns up, I have enough LiFePo4 cells and the charge controller to switch to 48v.

[@wenhaowong5549]

i like the way they hold the cell together

[@garryhammond3117]

A rare and pleasant surprise Will! I say "Test 'em ALL"! - Cheers!

[@RimdarRanch]

THANKS Will !!! These will now sell out before I can grab a couple.😯

[@highlander723]

Early bird get worm

[@MrBowNaxe]

Wow! Will was impressed with the build of this one... Guess it will work for me just fine.

[@ohioplayer-bl9em]

I generally mark parts and take pictures when I take something apart for the first time. Get some stickers and lable thing with numbers, letters, or colors. While taking lots of pictures with your phone. Saves a lot of hassle when putting it back together.

[@zumbatan550]

Ya, I like the video. The fact that you make a mistake and didn't hide it or skip them. We all learned from mistakes and mistakes made us better . Your mistake you highlighted benefitted us.

[@mr.d3020]

Pro tip, test the batteries before disassembly, LoL. hate to see that happen, love the videos keep them coming!

[@Roll2Videos]

Awe man, They almost sent me their trolling motor battery for review but backed out last minute. Now I know why. I was hoping to get a golf cart battery instead but I guess that's not happening 😓 As always great video Will 👍

[@lancegrina1225]

Rubber on the heat sink fins and batteries is probably intended to sink the heat to the case. Try checking the thermal conductivity of the rubber or rubber foam. Air gapping heat sink fins inside of a sealed case is a recipe for disaster too. I suspect the material is working as heat sink compound.

[@MYCHANNELWITHMYSTUFF]

And just like that, there website is now secure. Thanx Will 😆

[@mrf5347]

Suggestions, Test before disassembly/breaking Disassemble and evaluate Retest Great information!

[@ralphbell1786]

The autopsy showed that the cause of death was...autopsy.

[@Jipby54]

I'd love to see you do some of our batteries made available here in Australia such as the Deep Cycle Systems batteries or the iTechWord batteries which seem to look a bit like a Chins battery you have had on the Channel before. I can't imagine the testing you do is cheap but love the content you put out. Always super informative 👍

[@chrispekel5709]

He probably won't, our country is too small as a percentage of his user base to justify it. Personally I think itechworld are just overpriced, can get the same batteries much cheaper. Like kickass they're just a rebranding and marketing company

[@jijisuka2708]

Eventough the test is somewhat complicated to me, i am impressed with what you have now. Great test for non-tech person like me.

[@idahobassman3388]

Thanks for investigating this trolling motor battery. I am in the market to switch from AGM to LiFePO4 and your tear-down videos have been very informative. My only request is that you add Ingress Protection testing to your mix of tests. In a marine environment I would like to see if any water "gets in". Maybe, before you open it up, you could spray it with a water hose (IP65) or submerse in a bucket (IP67), then see if any water is inside when you open it up. What do you think about this suggestion? thanks again,

[@jimh4167]

Always good to mark things when you take them apart

[@Kfrankie46]

I could be mistaken but that rubberized material looks like it could be some sort of potting material which could help with thermal transfer to the outside of the case instead of the heat being trapped inside the air in the case, would be interesting to see performance results with and without that material to see what the temperature difference is at full load until it is completely discharged, maybe the company could send you one with and without that material for testing

[@WillProwse]

Ohhhh interesting

[@WillProwse]

Good point Frank

[@ralphbell1786]

If it had a metal case that would make more sense. Transferring the heat to plastic wouldn't help much. It would nice if they had an aluminum heatsink on the outside.

[@Kfrankie46]

@@ralphbell1786 it helps more than you think, if it was open air it would create a pocket of hot air and because there is no airflow it would stay around the heatsink area with very little transfer to the plastic, I agree, if heat on that heatsink is an issue it would be good to see the heatsink extend to the outside of the box but still be watertight

[@LiquidTurbo]

@@Kfrankie46 No one wants metal outside of the battery except at the terminals. I agree with your analysis. Heat transfer dynamics, it doesn't look good from the afar, but having this heatsink to distribute heat to a casing (even if plastic), is far superior than air trapped inside. One can do the calculations to figure this out, particularly if the potting material has a high heat transfer C value. There's more than meets the eye here with the heatsink design.

[@emd6456]

Will, great work. I always look forward to your excellent reviews!

[@danielsingleton5104]

they took your advise and changed the case, it looks much better, $600 now

[@sailorbuoy2301]

Roypow has a C48100A Marine Battery with an interesting Cable design. 48V 100ah IP65 Hopefully it works great. Hope to see a video from you on it.

[@RichardWylie68]

I could be wrong, but one benefit of high temp sensors at the terminals is that it could detect high resistance connections at the terminals.. For example, a user loosely connecting to the terminal or using an undersized cable.

[@WillProwse]

Absolutely

[@ralphbell1786]

Especially if this was in a golf cart getting jerked around.

[@victoriab9273]

Your excitement is contagious :) Thanks for the great educational info, went with 3 of the 12v 100ah to replace old Lead Acid batteries on my skoolie.

[@deconstructed5135]

Will, thanks for the great content. It always a pleasure to watch your videos.

[@HamRadio2]

Nice work, Will. Glad you're back

[@iceholepower8012]

RoyPow just sent me their 30Ah. It barely pulled capacity and I plan on tearing it down this weekend. Hoping that it looks as good as their 100Ah! I did teardown their 6Ah for fish finders. It was a mess, the cell holders were all gooey like they were melting.

[@fishhuntadventure]

Care to explain why they are gooey? Think why they made “worm proof boxes” with different makeup due to plasticizer incompatibility…

[@iceholepower8012]

@@fishhuntadventure When I opened it up, there was a strong chemical smell. I think the plastic (ABS maybe) cell holders were melting because of the presence of acetone in the adhesive. In the 3d printing world we call it vapor smoothing to get rid of the layer lines. I am speculating that was what was going on, but I could be wrong.

[@OffGridSolarSmartHouse]

This was so great. I love how this battery shocked you in everyway with built quality and down to there website. I did an overview on their 12v 30ah on my channel and honest loved it.

[@artsseriouschannel]

Note to myself : this is an excellent battery.

[@timaz1066]

I still love my two 200 ah Lossigy batteries. Thanks for the video.

[@ez4009]

Great job on the benchmark for the battery, I hope you get the marine battery soon that one looked really nice.

[@oldfieldfamily317]

As always top class informative videos, ever considered Will doing a boat 12v/24v set up, as I am sure alot of your viewers are from this community, as alot of us try do our own boat Solar setups and have 12v and 24v instruments on our boats. Keep up the great videos 👍

[@fvrrljr]

making mistakes is part of the learning process. we've all been there and still make mistakes. that's why label label label. try assembling it again, it might not be dead but be safe can't wait till update when you get another one 👍

[@HutchinsonJC]

That heat sink is probably designed that way intentionally to allow the heat to exit the enclosed system through the battery casing itself. Otherwise, a heatsink in an enclosed system touching only the enclosed air can only reliably exchange heat with that trapped air.

[@donnahodges7952]

Their website has so many misspelled words that I would not buy from them because I would question their quality. My first thought was it was a Chinese company and if the quality if their battery is the same as the quality of their website, it would not be worth buying. This review changed my mind.

[@benjaminnead8557]

"This is battery porn." I burst out in laughter as soon as you said that. But, yeah this why we tune in, Will. So good to see you posting again.

[@stanowens6703]

I run a roy pow battery on my golf cart. It has been excellent for me.

[@Stevenowski]

Two videos in 2 days?! Keep them coming!

[@lettuceb]

Can you check out the Epoch trolling motor battery? Looks almost identical, but they’re a little cheaper then Roypow. I have been wanting to get a 24v unit to power my trolling motor, but I’m always too nervous because the variance in all the lipo4 companies

[@hansk5169]

I too am curious about the roypow vs epoch for marine apps. 12v 100ah lifepo4 would be a game changer with this level of quality.

[@WoodmanFFM]

The rubber on the BMS heatsink in the cheap battery is probably still better at conducting heat to the outside that air would be, i.e. by filling the heatsink fins up with the rubber glue they likely achieve at least a certain amount of thermal coupling to the outside world. Of course, being a sealed system, it will always be difficult to get rid of the heat and a heatsind without fins that is directly glued to the outside surface of the battery casing would likely be the better alternative.

[@kenmarchlenski4477]

You're my Go-Too Guy on Batteries and Puff and Stuff!

[@SchClean]

They allready raised the price by 50% since last night. Now $600.. Is that right? Wow. Should of bought it last night.

[@elbebe1000]

Those companies abuse Will Prowse reviews... should not recomended them when rise the price in 2 days after review it

[@sethdrak3]

Can't say I wasn't expecting you to mix match the cables when you were putting it back together... Lol

[@LithiumSolar]

I'm pretty sure RoyPow is owned by EVE, which may explain the quality. Having that heatsink covered in rubber is crap, why would you insulate a heat sink?? That same BMS was in the RoyPow-branded battery that I tested. Something else had it too that surprised me, might have been the LionEnergy - I'll have to look.

[@LithiumSolar]

Yes, it is the LionEnergy - it has a RoyPow BMS that looks very similar (not identical).

[@americannumber2]

No, the company's Chinese name is 惠州乐亿通. Eve is 惠州亿纬 which is battery manufacturer. Poypow uses Eve batteries but they are not the same company. One day you come to huizhou and dongguan in guangdong China you will see all of them. Battery capital of China

[@LithiumSolar]

@@americannumber2 I never said they were the same company. I said that I believe EVE owns RoyPow. In fact, it even says this right on their website.

[@americannumber2]

@@LithiumSolar prove it

[@LithiumSolar]

@@americannumber2 Prove what? It's on their website. Go look with your eyeballs.

[@thomascronquist1604]

I love your humor…

[@lifetimeofworktodo]

I appreciate you showing the mistake you made- it’s humbling but always nice when it’s the BMS rather than the cells 😂

[@tuberdave1]

Thank you for being so honest and detailed.

[@jbarnes1719]

I bought two of the 12v 100ah Powerus batteries. I charged them with the same Aims 75a charger @ 48-49 amps. It took about 1hr 40 minutes. According to the app they are 100%. I was expecting to need to to use my 10amp power supply to finish the last 10% to balence the cells but the Aims fully charged them. I have not load tested them yet as I am waiting my Victron shunt. The cells are within .004 of one another on both batteries at average voltage of 3.575v on one battery and 3.355 on the second battery.

[@jbarnes1719]

Well my experience is that there is a glitch when using the Roy Pow app. I read 74ah then 100ah. This happened several times on three different batteries. When monitoring using my Victron 500amp shunt 100ah was observed during charge and discharge with no variation. So I believe at this point the batteries are good and problem is in the app.

[@thomasbloesch7551]

I thoroughly enjoyed the video, you seem to be pleased with the construction of the 12v 100ah battery. In Oct 2021 you did a teardown of the Weize battery that had low temp charging protection, do you still recommend that battery? Lastly, have you had a chance to look at the Lisuateli LifePo4 battery yet? It's going for $309 on Amazo now. Keep up the good work.

[@sadiqyusuf4584]

Always enthusiastic. Love your work in keeping us informed.

[@markpowell7325]

Just a thought. Maybe mark the wiring connections and battery placement before disassembly. If all else fails take a picture something you can revert to for reassembly. Like your videos really wanted to see the marine battery test results.

[@onomatopejaB]

He literally made a disassembly video As you can see routine and rush to kills BMS’es 😂

[@OldDog9901]

Temperature sensors on the terminals work great to measure internal battery temperature as the terminals transfer the internal heat efficiently

[@PhG1961]

I'm very impressed and amazed ! Excellent review. Now that I've seen this video I actually consider buying one of these !

[@JRP3]

When you started taking apart the first battery I thought "he really should test the battery first just in case it gets damaged during the tear down." I wonder if the temp sensors on the terminals are actually better since it's a direct thermal bridge to the cell electrodes and potentially gives a more accurate reading of the internal temps than the outside of the cell case?

[@modernnomadtechnology9252]

Agree. If it was me, I'd def do capacity test before teardown. Probably several cycles. You never know if something you do could affect the unit somehow.

[@michaelwalling8281]

Your un edited mistakes do wonderful things for my self esteem. Thankyou.

[@Rambleon444]

LOL, maybe from here on you should test the batteries before ripping them apart. Love your content, thank you!!!

[@loucinci3922]

Too bad you smoked the BMS. I bet that would have pulled capacity. Quality build from the look. Looking forward to the RoyPow-2.0. Thanks for sharing

[@herbertvonsauerkrautunterh2513]

These batteries are very expensive here in Australia😮 Nice case. I love it

[@TT-dp8qh]

I really like your full review on a product.

[@Stuart_Johnson_Solutions]

The two comms ports are so that you can have a dashboard battery monitor connected AND a diagnostics port presented somewhere without interfering with each other. The golf cart batteries only have one port so you have to unplug the gauge before being able to talk to the bms with a pc.

[@Stuart_Johnson_Solutions]

We have a dealer who supplies us with these batteries for our EVs and yes, they do a great range of drop in replacements for lead acid traction banks.

[@hamradiohack]

Nice because sold originally for a different market. Once they get wind of diy solar enthusiasts using them the price will go up

[@calmeilles]

Test _before_ tear-down. 😀

[@klausrondinella9187]

Awesome info buying 2 200ah batteries for my rv

[@JudgieRob0422]

Enjoy your informative videos

[@WillProwse]

Thanks!

[@Dreadlk]

Will-P you need to always film the battery test first then do the teardown. You can edit it later if you want the Teardown to be the first thing shown. I cannot tell you how many times Dave Jones motto "Don't Turn it On, Tear It Apart" came back to bite him in the ass when the unit would not power on after reassembly. He later on stopped tearing down stuff without first testing it.

[@WillProwse]

You don't think I can't figure that out? 😂

[@sunflowerseeds8007]

"We're going to tear it apart because the documentation is pretty bad". Didn't hear anything after that because I was cracking up so hard.

[@SvetzBowman]

The undocumented "communication" port is possibly an internal quality control test port and not meant for consumer usage. Update: In an Amazon image for their 24V 80Ah I see a cable attached to a "whistling" battery monitor to display the SoC, so possibly it's for a similar device that they haven't started marketing yet.

[@WillProwse]

It is designed for consumer usage. If it wasn't, and they spent money on it, they are trying to lose customers. That would just be silly

[@keithezard]

What a fun video - you went marine - love it - thank you :)! Looking forward to the next installment :).

[@petenelson8136]

Love how you tear these batteries apart. Too bad you swapped the cells and burned that one battery up. It will be interesting to see how it tests out once you get another one.

[@Pappy-1]

I had went to their website early today and the budget battery was $400 now it is listed at $600. If you put it in your cart it does discount $200 for first time customers. So it is $400. Their webpage is misleading and I bet they loose sales by not showing the discount on the battery page. They give that discount on multiple sales of the battery. I just kept adding to the cart and it kept discounting each $200

[@deconstructed5135]

I did the same

[@danieleriksson3170]

next time get some small different color stickers and tape. this way you can easily do the matching when assembly. Bummer for the battery! looking forward for future updates.

[@kkarllwt]

Or a book of wire numbers.

[@Michael-si2ln]

I'm always impressed watching your videos. Also I learned a lot every time. I highly recommend you 👍

[@Hiker97]

While a quick review can sometimes help when making a purchasing decision they're really not thorough enough to make an informed decision. I bought the Powerurus 12v 100ah battery and for the most part it works fine. However, one behavior of the BMS is troubling. After charging to 100% using a Victron SCC (LifePO4 preset) "full charge protection" is triggered and the chargeMOS turns off. The battery needs to drop to less than 70% (in app) for the chargeMOS to turn on again. While it will probably be OK for my use, there have been good solar days where I prefer it topped off. Here's the response from support: "Because the battery has not yet reached the overcharge recovery stage, it is not allowed to charge. This is designed to avoid repeated charging of the battery. Charging will resume only when the voltage is close to falling below 3.3V. Please charge the battery again when the voltage is close to 3.3V."

[@nibblesd.biscuits4270]

Fun to watch you pull these apart. Hey Will can you look at moseworth batteries, I have a couple 200ah 12v running and would like to buy a couple more and would appreciate your feedback on the build quality before spending the cash on them. I believe moseworth made smaller lithium packs for the rc market. These 200ah are sold for trolling motors and are at a pretty low price point on Amazon. I appreciate your poking around the market for all of us trying to go off grid.

[@twong689]

Saw that POW, that is something. 😊

[@Nimbus495]

Make & price of; 1. The power supply with the digital metering 2. The little meter 3. The shunt. TY. Really enjoy your informative channel.

[@RobtTa]

Thanks! Always fun to watch these..