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@aprilcole4451 Күн бұрын
Awesome video on a hot roof design. The visualization and explanation, outstanding!
@aprilcole4451 Күн бұрын
Great to hear about you and your heart! Keep making the building videos and sharing your knowledge. There’s a lot of people you can enrich!
@jasonm.1370 5 күн бұрын
I’ve watched all your videos involving these battery builds. I’m ready to invest and I have a question. With a 3000 victron inverter how long will one of these get to 80 percent charge? By the way, thank you so much for sharing your knowledge and expertise. You have no idea how much you have helped me. May god bless you a million times!
@EUCRAZY_AU 6 күн бұрын
I have 81 cells 400AH and 200AH whats the best way to check batts and balance them ? was thinking the EVCA40L ?
@RayBuildsCoolStuff 6 күн бұрын
@@EUCRAZY_AU i’m not familiar with 400 amp power cells. Are these lithium iron phosphate? My favorite tester is the EBC A40 L.
@EUCRAZY_AU 6 күн бұрын
@@RayBuildsCoolStuff Yes mate LIFEPO4 big ones :) for home solar :)
@RayBuildsCoolStuff 6 күн бұрын
@ interesting, never heard of 400ah although there are some new 560 ah being released.
@EUCRAZY_AU 6 күн бұрын
@@RayBuildsCoolStuff sorry mate my bad 200/100 i accidentally doubled them sorry it's 2am here lol I'm going to bed.
@RayBuildsCoolStuff 6 күн бұрын
@ oh ok, now it makes sense.
@curioussand1339 11 күн бұрын
Efficiency and durability of the flat solar panels is not good. They get too hot due to lack of air circulation. Not to mention that your cabin could heat up due to this. Monocrystalline solar panels is the way to go.
@RayBuildsCoolStuff 11 күн бұрын
That used to be the case. The new CIGS are much better. There is no evidence of additional heat on the inside when the ceiling is viewed with a thermal imaging camera. That’s because the aluminum roof measures at the same temperature as the solar panels which was a big surprise to me.
@curioussand1339 11 күн бұрын
@@RayBuildsCoolStuff Ok, aluminum is a great heat dissipater, which could explain your observations. Still I believe the panels should raise the temperature of the roof, if anything, just because black heats up a lot more than white/grey.
@RayBuildsCoolStuff 11 күн бұрын
@ that seems like the intuitive answer, but testing proves otherwise. When measured with an infrared temperature sensor, the dull aluminum roof has approximately the same temperature as the black solar panel on a cloudless summer day. It may have something to do with the amount of heat that is radiated off of the surfaces into the sky. I have just learned over the past decades that my best thinking does it mean I know the answer. My best thinking is what sets up the experiment so that I can actually test to find out real world results. Often by thinking proves accurate, but not in every case.
@RayBuildsCoolStuff 11 күн бұрын
Roof temperatures are a funny thing. Black composition, shingles reach 200°F. Dark green composition shingles reach 170 which is the same as dark, red or brown. But on a sunny day with high thin clouds, the temperatures tend to be higher, even though the sun is not quite as bright. I think that is because it reduces the amount of heat that is able to radiate off the surface of the roof into deep space. If you point the infrared gun at the sun, the temperature you will read in the summertime is somewhere around 15°F. That is because While it is reading the sun, it is also reading all that deep space around it. It ends up being a temperature that I find consistent with what you would experience at 15,000 feet. I only know this because I have spent a lot of time skydiving. The heat that radiates off of that roof to the sky is a very powerful factor in this equation. On a related note, the next time you notice frost on your roof in the morning when the temperature is well above freezing, the mechanism that causes that is the amount of radiant over cooling that has occurred at night while the roof is radiating its heat to deep space but deep space doesn’t radiate much heat back to the roof. The roof temperature may be 10° cooler than the ambient temperature which is why frost forms on the roof even though the temperature may be 37°F.
@RayBuildsCoolStuff 11 күн бұрын
On a very hot summer day in Texas, I was measuring the temperature of the solar panels and the aluminum metal roof at around 190°F. If you would ask me to guess the temperature of the aluminum I would’ve said 140°F. Apparently that surface doesn’t emit radiation very well.
@donovanpl 13 күн бұрын
So I’ve been looking at videos on lithium iron phosphate batteries with of making them as a business. Here’s my problem… if any let out thd magic smoke, I may get sued. Also, I don’t have a workshop and would have to make them in my apartment.
@donovanpl 14 күн бұрын
I really think that the explicitly stating various make/models would have been more useful… unless I missed them.
@JerryPosey-g7r 18 күн бұрын
My tractor done same thing the bolts came loose in back of motor and oil leaked the dealership where I bought mine told me to bring it back and they would fit it but it set there for three weeks and never touched it so I fixed it my self
@reginaldpotts2037 19 күн бұрын
I found these bench power supplies to be unreliable on their displays. According to my tested work Fluke multimeter when my 20A PSU shows 3.65V on the display the MM shows 3.68V at the croc clips. My 5A PSU shows 3.65V but on the MM I see 3.62V at the croc clips. Now, I disregard the displays and set the PSU's to full amps at 3.65V according to my MM before attaching to the battery in parallel. Before this I also charge the battery in series as high as the BMS will allow at 3.65V to get the most power into the cells from 140A charger 0.5C. This way my 25A input power supplies will top balance overnight otherwise it would take many days.
@jackhandyy 19 күн бұрын
At first glance I thought Caitlyn Jenner went back to being a man and was in the lpf batteries now
@mineyourgpu8966 19 күн бұрын
Battery whisperer...
@mascoffeegrande2763 21 күн бұрын
Just bought 32 EVE mb31 cells and 2 vertical Apexium cases from her - thanks for the recommendation.
@ivannightly1919 25 күн бұрын
maybe a dum question but why wouldnt you just screw on SIP's on to your roof industrial ones are aluminum on both sides and 4" foam in between then you don't need to roof
@RayBuildsCoolStuff 25 күн бұрын
It’s not a dumb question. The reason I have always shied away from sips is because in any situation where there is a roof leak and the layer of decking on top is compromised, the structural integrity of the entire roofing system is damaged. There are also the issues of the complexity of installing it with the splines and sealants and trying to figure out how to get it all together so that it performs as an airtight structure. There have been some pretty bad failures over the years. They lend themselves to straight simple structures and don’t work at all well in a roof that is cut up. The reason that they have never caught on and become a popular building method is because of the numerous Problems with their implementation in the field.
@lennymiller7336 25 күн бұрын
Why is the common solar battery bank in a 48 volt configuration? why not some other voltage like 12 volt or 36 volt?
@RayBuildsCoolStuff 25 күн бұрын
Lower voltage like 12 V requires much higher amperage. The sweet spot seems to be 48 V. 36 V leads through much smaller set of choices when it comes to inverters.
@blainecelestaine4543 26 күн бұрын
Consider using some drill pipe. It's cheap and I bet it plentiful out your way. Good to see you're still innovating
@RayBuildsCoolStuff 26 күн бұрын
@@blainecelestaine4543 I went ahead and did this big expansion. I haven’t made a video about it but I did add 11,000 W to my current system. Been off grid now for a few months. Need to make some videos and share with y’all how it’s going.
@blainecelestaine4543 26 күн бұрын
@RayBuildsCoolStuff 12th round in a 15 round fight as usual..... I'm building a 450sqft shed and I will put my panels on top of it .
@RayBuildsCoolStuff 25 күн бұрын
@@blainecelestaine4543 how is everything working out for you? I think you asked me about buying cells three years ago just before I made a video about suppliers. I mentioned you(not by name) in that video. How many batteries have you built now?
@blainecelestaine4543 25 күн бұрын
@RayBuildsCoolStuff yes that's me I had ordered 32 cells. But I didn't install anything on my house yet. I have experimented with the cells 280ah. I had bought 2 5000 growatts off grid units. And a min6k on grid growatt. I returned the offgrids and transformer bcuz of issues concerning bonded neutral in the inverters. My intention was to install the on grid unit as ZERO EXPORT but I that feature wasn't as robust and supported as I needed so I have been waiting. Currently I am building my shed which will hold the 9600 watts of panels I currently have. I am building budgeting for 10 to 12 k hybrid inverter with zero export. I also want to add 12 kw of more panels and double my battery bank in that order.
@robertderrick5787 29 күн бұрын
Do you think it would be a good idea to use corrugated signboard in between the cells with compression and the ability to have ventilation
@RayBuildsCoolStuff 29 күн бұрын
@@robertderrick5787 there is no need for ventilation so I would save the space required.
@shakyajones Ай бұрын
For getting WiFi at the barn, if your phone has a decent cellular signal there and if your phone has WiFi hotspot capability, turn on your phone's hotspot and connect your inverter's WiFi to it.
@RayBuildsCoolStuff Ай бұрын
I assume so.
@JonOffgrid Ай бұрын
😎👍
@daviso4954 Ай бұрын
Good video thanks. I wanted to lnow if hou can wire these into an IMO DC disconnect for a solar array?
@elgatoconbolas Ай бұрын
Thanks Ray and I hope you get better soon.
@EUCRAZY_AU Ай бұрын
Do you suggest a Fuse between the cells incase a cell goes bad as the other cells voltage will go straight to the bad cell in para thanks for the video.
@RayBuildsCoolStuff Ай бұрын
No
@EUCRAZY_AU Ай бұрын
@RayBuildsCoolStuff really why?
@RayBuildsCoolStuff Ай бұрын
@ I’ve never heard of it being an issue while top balancing and in series with a BMS it wouldn’t be possible.
@EUCRAZY_AU Ай бұрын
@@RayBuildsCoolStuff kzbin.info/www/bejne/qprJpoqJabyKa8U
@RayBuildsCoolStuff Ай бұрын
@@EUCRAZY_AU the video that you linked refers to batteries, but your question asked about cells. Cells are the individual components that are combined in series to create a battery. I absolutely use fuses in each battery and breakers between individual batteries to protect from failures caused by shorting. If you watch my other videos, you will see what I mean by that. I use a 250 amp fuse in each battery and a 175 amp breaker between the battery and the combiner buss.
@EtopEka-z2c Ай бұрын
Gewoon even in het Nederlands, dit is inspirerend Ray! Eerlijkheid is iets dat je uitdraagt tot het einde van je leven. Dat moeten veel niet zo helder denkende mensen nog leren.
@gwoiler Ай бұрын
I had some good experiences and then went for a 1000 cell order and they stiffed me with mostly .2C cells instead of 3C cells, and many were less than a volt showing they were very old. After a 2 month fight, I got a full refund except for the credit card charge. I was working with a manufacturer. I believe the sales lady did not know that shipping unloaded junk on me. I got to keep the old cells because they would not pay to ship them back. I have actually sold about half of them on ebay for what they are. I say, get your seller to repeat on the secure messaging to repeat what you are expecting to receive. This is important if you have to get a refund.
@ndoghouse6853 Ай бұрын
I have a Wanpteck PS605v I use for testing PC fans every day and it smoked like crap one day. I mean visible smoke out the vents and the oh so familiar small of burned mosfet! Anyway I Let the smoke clear and turned it back on just for the hell of it and its been working fine ever since? WTF? I never even opened it but I prolly should! Its same spec as yours but its a black faced and newer one I believe. Baffles the heck out of me but like they say if it aint broke dont.../ I never walk away from it and leave it on but I do use it while im at the bench! I have six or eight of them now and I never had problems. I use them 100% duty cycle for months and even years at a time and they are great. Never shut down on me even once. I also use "Tekpower" TP3010E for 24 volt testing and its as good as the Wanptek. Its good to 30V and 10A. Anyway im new to solar power and battery packs but not new to electronics and enjoy your videos! Keep them coming! Your boxes are cool! Thats kinda what I want to do for camping in my truck!
@mlg779 Ай бұрын
I ordered 4 times from Jenny Wu with no issues. this last time, few days ago, I ordered 64 batteries from which only 30 are flat. the other 34 are deformed a little bit. a bit inflated. I tried to replace them and Jenny keeps telling me that there is no problem with the batteries and does not want to replace them.
@RayBuildsCoolStuff Ай бұрын
Cells are not always perfectly flat. I’m not sure the level to which you’re talking, but I always test my cells to judge their performance. Have you run tests on the cells?
@mlg779 Ай бұрын
@@RayBuildsCoolStuff No, but I just want them to be flat. I ordered about 6 times total from china and always received flat cells.
@RayBuildsCoolStuff Ай бұрын
@ I have received sales that weren’t perfectly flat a number of times from different suppliers. I have made videos about testing them and I have used them in many batteries. I can’t say that not being perfectly flat has ever made a real difference in the performance of the cells. that would of course require extensive long-term testing. I’m pretty critical about things as you might’ve gathered from my videos, but this is not one of the things that keeps me up at night. How far are they off from being flat? If they are bulb in any dramatic way, that would obviously be a problem.Being bulged one or one and a half mm really isn’t an issue from what I have seen and what I’ve heard from others. I’d really like to know what yours look like.
@mlg779 Ай бұрын
Also if they are not flat, she has to mention that, so I can make a decision if I want to buy then or not.
@RayBuildsCoolStuff Ай бұрын
@ how bulged are they measured with a straight edge?
@philippetouze4239 Ай бұрын
Hello, can you give the dimensions of your boards for your 14 kW batteries. From a French subscriber
@RayBuildsCoolStuff Ай бұрын
The fuse comes from Stella Volta or the AltE store. The screen is included with the Seplos BMS.
@lowfat1713 Ай бұрын
beautful build Ray. can you provide part number or link to the display and fuse that you use please?
@electromechanicalstuff2602 Ай бұрын
Where did all these go. Show us the battery/inverter room
@RayBuildsCoolStuff Ай бұрын
@@electromechanicalstuff2602 I would love to do that for you, sir. The system is complete and I’ve been off grid for over a month now. The problem is finding the time and the motivation to get serious about starting to make videos again. Thank you for watching.
@electromechanicalstuff2602 Ай бұрын
@RayBuildsCoolStuff yes I definitely understand. My 65kwh lithium ion system has been up for about 2 years but never "done" I built my batteries out ev batteries I did thermal mass testing on at my last job at one of North Americas largest auto suppliers. Ive never had a thermal event but sometimes loose sleep thinking about them being in my basement. I just bought 71kwh of lifepo4 grade A new overstock envision cells from battery hookup. Should be showing up tomorrow. I'll get all these lithium li-ion batteries out of my house and install the safer chemistry Into the fire resistant cabinet I have in my basement. Here in Michigan it's a big chore to get a fully temp controlled room outside to hold these batteries. I also am about to purchase my 3rd inverter. You obviously did more homework than most of us on that. The tech on inverters has been changing so rapidly. I've had MPPT LV6548, Growatt 12kw now I'm going to buy an eg4 12000x off grid. I do have videos of my system on my channel but for some reason putting links in comments these days is a sure way to get your comment disappeared. But I'll try replying one more within the link. Love to see your finished product whenever u get the time and motivation.
@offgriddreaming5403 Ай бұрын
Hi Ray, I just bought one of these. How are your seplos bms going please?
@RayBuildsCoolStuff Ай бұрын
@@offgriddreaming5403 they are fine. I haven’t connected to them to make adjustments so they are just operating on the default settings but no problems.
@ingenieroobras3101 Ай бұрын
how do you like your DEYE inverters
@RayBuildsCoolStuff Ай бұрын
@@ingenieroobras3101 they work perfectly.
@JoseRamirez-dl7jt Ай бұрын
Good afternoon Ray: I hope this email finds you well. I was reading about the Deye/Sol-Ark bricking scandal on the Diy Solar Forum this morning when I suddenly remembered that you built your system using Deye hybrid inverters. Have your inverters been affected by the kill codes issued by Deye and Sol-Ark? I have seen many reports of inverters that were bricked by the kill codes nationwide, including Puerto Rico, the U.S.V.I. U.S. other territories, and abroad. How do you protect your equipment, maintaining the software up to date under those circumstances? From my perspective, this is a wakeup call and an eye opener for someone like me doing research for the future installation of a solar ESS. Needless to say, I'm enraged by Sol-Ark and Deye actions against customers violating private property rights. Both of these companies are complicit in this scandal. I grew up in Puerto Rico. Knowing the situation there with the power grid, and low income/wages, I can see how people could turn to inverters brands like Deye to try to make the most out each buck. My father-in-law installed a solar system in the aftermath of cat 1 hurricane. Luckily for him the installer who sold him the system installed a Sol-Ark inverter. However, being a retired disabled Vietnam vet on a budget, he could have fallen victim of this situation due to a purchase he made during desperate times a couple of years ago. I’m glad that’s not the case for him, but I imagine that this is the case for many people on the island that have to endure an unreliable grid on one of the highest power costs nationwide, and now this to compound their problems. So personally, any consideration I may have given to inverters manufactured by Deye, including Sol-Ark, are now off the table. Both of these companies are “dead” to me. Do you have any recommendations to consider when designing a system under this new reality? V/r Jose L. Ramirez
@jws3925 Ай бұрын
I commented on this video about a year ago and it looks as though it might have been removed. On Ray's recommendation I purchased some EVE cells from Jenny Wu. To her credit she was very responsive to my emails and the transaction went very smoothly. However, the cells I received were very suspect. The QR code reveal a build date well into the future ie. it was May and the manufacture date was in September of the same year! Secondly, there was no paperwork packed with the cells. Nothing. The cells were packed very well and the buss bars were included.. They did test to capacity stated but even low grade cells can do this. I am still leery of these cells and don't think I will order more. The previous purchases from Amy I have no issues with but shipping took a looooooooonge time and overall cost was more. But, from all I can gather, I got what I paid for. Personally, I think (as Will Prowse stated) these companies send their influencers better product than what we DIYers get when we order from the same person/company. Is there really any supplier that is truly honest with a DIYer? I don't know. It seems like it is the luck of the draw. One person has a great experience, a couple others have a great experience and then an unsuspecting person has a not so good experience.
@donaldpedigo296 Ай бұрын
.. Ray .. You're a Patient - Calm - Appreciative Man .. ... Have You Considered Doing Your Own "Hauling" to Save You Some Money...? ... Much Respect From a New Subscriber ..
@RayBuildsCoolStuff Ай бұрын
@@donaldpedigo296 of course I have considered it. On doing the math, it isn’t worth my time. Life is short. I have to decide how to spend it and hauling the tractor didn’t make the cut.
@donaldpedigo296 Ай бұрын
@@RayBuildsCoolStuff 🙏😇
@HouseofBronn Ай бұрын
Hey Ray, How do you get 15amps on the riden, I have 2- rd-6024 i put in parallel i'm usually getting 5-6 amps each that's with maxing it all out = 3.65v x 24amps. Also i don't get a live voltage reading unless i pause the unit or have a volt meter on it or is there a setting in the menu for it. The EBC-A40 does have a live reading but i love both of them. By the way I ordered from (Jenny Wu) that you suggested for the (20) mb31 and the Ebc-A40 and received them within week and have because she already had them here in the states. Putting a DIY box together that Andy's off grid garage suggested. Thanks for all your videos!
@EmilyLAUU 2 ай бұрын
dear ray, we are battery supplier, may we have your email please? thank you
@sayeretmatkaal 2 ай бұрын
Has anyone else charged LiFePO4 cells with WELDING INVERTERS ? At over 200A, it doesn't take very long. Just stay nearby and monitor the temperatures.
@olafschermann1592 2 ай бұрын
9MWh or 625x14,3kWh Rack batteries would be the threshold for getting 1/3 of the regular cell price (=$18 per 280Ah cell). 10.000 cells is a very high barrier to reach that price. Even with friends i could not find a way to use more than 1.000 cells. Does anyone here play in that field? (E.g. shipping containers for energy spot market arbitrage trading which is neccessary here in europe where solar and wind has so high percentage since they shut down all german nuclear powerplants)
@r.e.m2676 2 ай бұрын
You my friend, have a lot of integrity. Thank you for taking the time to do this. Just keep tabs on Jenny Wu and her company. If people start saying bad things about them, remove your endorsement. Don’t feel bad about making a commission on the sales. You deserve it
@RayBuildsCoolStuff 2 ай бұрын
@@r.e.m2676 thanks. She is still great.
@jeremiahboyd7009 2 ай бұрын
My ls tractor is awesome when it's actually working. But it's been nothing but problems
@RayBuildsCoolStuff 2 ай бұрын
@@jeremiahboyd7009 how is your dealer support in your area? What problems have you had?
@jeremiahboyd7009 2 ай бұрын
@RayBuildsCoolStuff not good they promised the world in order to make a sale. Had it in twice for repairs on leaking seals . Now it's leaking again. I tore into it yesterday and noticed my dealer used silicone to do the repair instead of busting it apart and putting new gaskets and seals in . Since I've owned it I've put over 3k in repairs + 700 for my 50 hours service. I think LS is a great company. It's just the dealers take advantage .
@jeremiahboyd7009 2 ай бұрын
I'll be making a video this week for youtube.
@RayBuildsCoolStuff 2 ай бұрын
That sounds like a terrible service department and or dealer.
@aubreyjarrett6817 2 ай бұрын
Thank you
@william88888888 2 ай бұрын
What materials are the bolts made out of? My search shows that Zinc plated washers and stainless steel might have a risk of galvanic corrosion? Enjoy watching your videos!
@RayBuildsCoolStuff 2 ай бұрын
The studs are stainless, and the nuts are zinc plated. Absent a continuously, wet or saltwater condition we will never have to worry about corrosion. Same is true with the tin plated, copper busbars, and the aluminum contact surface of the battery. Keep acids and salt away and you won’t have to worry about it. That’s what creates issues for us with our car batteries that are literally outdoors. Now, I would be concerned if I was somehow forced to have my entire system in a damn location, but even then these materials aren’t going to be the thing I worry about most. Raw copper? Yes, I would worry about that.
@ickogospodinov4217 2 ай бұрын
Hi Ray, thanks for this video, have you tried any other batteries from Docan, (Li-Ion or LTO) ?
@RayBuildsCoolStuff 2 ай бұрын
@@ickogospodinov4217 no but the newest version of lifepo4 are greater than 15% higher capacity which is awesome.
@killykilroy 2 ай бұрын
Nice commentary. But I'm wondering: what are you building, a flipping submarine? ;-)
@skydancer2992 2 ай бұрын
Useful video. I'm shopping for a LIFEPO charger. The ZKETECH did not seem to have a safety certification mark as required by OSHA for sale in the US.
@dennisslattery499 2 ай бұрын
I recently happened upon your videos seeking battery building information. Thanks for sharing your thoughts and knowledge and help in my journey into the battery building craft! I am needing to replace my lead battery bank. A big thanks for taking time recording your fine craftsmanship! Hope your surgery went well and praying for a speedy recovery. 😊
@RayBuildsCoolStuff 2 ай бұрын
@@dennisslattery499 thanks, more coming.
@serbanmarianflorin8849 2 ай бұрын
Why don't use silicon wire?? It can handle a superior amperage
@RayBuildsCoolStuff 2 ай бұрын
@@serbanmarianflorin8849 yes it can but the heat and resistance still occurs if you downsize the wire and in the same size it is more costly per foot.
@serbanmarianflorin8849 2 ай бұрын
@@RayBuildsCoolStuff inside is a diferent wire you can use a smoller awg for the same amperage and is more flessibile I am building my first battery, the screw on inverter is 8mm 13mm key on the battery is 6mm 10mm key, what binding post to use on the box a 8mm or 6mm is anny difference ??
@jamesmetz5147 2 ай бұрын
I want to thank you for your time helping.
@dude3146 2 ай бұрын
What's all the tank stuff in the background?
@RayBuildsCoolStuff 2 ай бұрын
That’s a Trimix blending station for scuba diving.
@dude3146 2 ай бұрын
Holy cow. Thank you for the reply. And the explanation. Look forward to future videos.