Solar2 · HackerTrans

They do not need to stay that cool at all. When used for solar, the C rate for charging usually never exceeds .2C for overpaneled systems. And usually never goes beyond .5C for discharge. So the heat generated is very small. Now when I am pushing 30-100C rates with a lithium polymer, cooling is an issue. this is why nissan leaf cells were recalled. The battery size was too small for the application, and they overheated which caused significant degradation rates. This is not an issue for solar. Just keep them at room temperature and they are fine.

Solar2

5 lat temudiscuss

I lived 10 years off grid in vans and rvs, and now I mine bitcoin and charge my teslas with offgrid solar. I have built systems with every chemistry, even lithium polymer and LTO. And FLA and AGM. I have a lot of experience in this realm. It does not sound like youv'e seen my videos before.

Lithium packs are not a nightmare to recycle anymore. There are huge corporations fighting to recycle them now, and the tech has improved a lot. I could not say this two years ago. Lead acid is easier to recycle, but the cycle life of those packs, and sulfation you have to deal with, make them horrible for the environment. Cycling them deeply kills them fast, even the expensive ones. If you do not cycle them deeply, FLA will last for decades, but will cost a lot of money , space etc. And you need to maintain them. Lithium ion chemistries such as LiFePO4 are far superior.

I think you need to get your hands on some cells and actually build a pack. Test the coulombic efficiency and usable capacity at various temperatures and you will be blown away. And you will save a ton of money over lead acid. Lead acid is very expensive, and I would make a lot more money if I sold them. I also do not sell anything on that website, it only has affiliate links. I am not on any sponsorship contracts or have loyalty to any company. Most of my review videos are me bashing design errors and various solar companies. I do not think you have seen my videos, going by your comment. It is a little bit cringy, unfortunately.

Solar2

5 lat temudiscuss

See, exactly proves my point. DOD is only 25%. If you do not cycle them much, you can make a lead acid last for years no problem. If you are doing 100% DOD, and do not with to deal with maintenance, and wish to have high coulombic efficiency, lithium is far better.

Volumetric density is a side benefit of lithium. We use it for coulombic efficiency, low voltage sag, high cycle life (much higher than lead acid, regardless of cycling bandwidth), usable capacity at low temperatures (much higher than lead acid! People always get this wrong), and higher specific energy. And lead acid sulfation and shorted cells require recycling. You can safely use a lifepo4 pack for years after degradation occurs. Lead acid is easier to recycle, but lithium ion recycling companies are dominating the space now. It is not like it was 3 years ago. Times are changing and there is no way anyone wants to throw out cobalt from a pack. LFP is much easier to recycle than cobalt based chemistries as well.

Solar2

5 lat temudiscuss

Thank you!

Solar2

5 lat temudiscuss

No of course not, I just see people on this site stating to use recycled NMC cells that are capable of burning down their house with one wrong move, then saying my videos are dangerous. I cover safety all the time, more so than any other channel I know. I do not understand why people are saying these things. I work very hard to make my videos, and people here on this site who do not understand batteries are trying to criticize me. It really makes me mad.

And thank you. Just figured out the automated banning process and am using a VPN now. I just want to respond to people, and I hope they can provide evidence of when I did something dangerous. Or said something wrong. And yes, I see what you mean about the downvotes. I am very upset right now because I could argue every point made against me here. I also allow people to criticize whatever they wish on my forum, so it makes it hard on this site where I am instantly censored if I get downvotes. It is very frustrating.

Solar2

5 lat temudiscuss

I spent an hour yesterday deleting spam, and then I get emails from long time viewers stating that their comments have been removed. I cannot tell you how frustrating it is. I try to fix this every single day, and I get my long time viewers to report the spam. Youtubes system is awful.

Thank you!! Hysolis is awesome, and with the LF inverter, you can easily work on it yourself. I am glad my videos help :) There are tons of scams online these days, and I love exposing them.

Solar2

5 lat temudiscuss

Wait, you do realize I am still wearing safety glasses and following basic safety precautions, which I state over and over again. I sound like a broken record repeating this stuff. I can work with raw terminals, because I know what I am doing, and I follow basic safety protocols every single time. That is why I am not dead. If I was wrong, I would be dead. I cover safety in every video.

And yes, I hope people follow my advice more than the other channels. People on this website are suggesting people use cobalt based chemistries that have dangerous thermal runaway reactions, from recycled products, which is dangerous. And then my channel complains constantly on the importance of low temp charging disconnect, OCPD, high voltage and so much more. What am I doing wrong here? How you read my comment, makes me realize that you never did watch my videos. You really have no clue what you are talking about. Using recycled NMC cells will burn your house down, plain and simple. And people in this group who think they know what they are talking about are recommending to do that instead? What???

Yes, with authority comes responsibility, and the only reason people follow me is because I cover every single detail, and I substantiate my claims with relevant literature in the lithium ion space.

What unsafe practices!?