That's a functional system that is 100% safe. There is no battery inside either, and I am using surface mount components that are recommended to be used on wood. It's a great little box. What's your problem with it?
You need to manually set the low voltage disconnect so that your batteries bms does not go into safety mode. then you won't have the first problem you stated.
What you need is more insulation. I've tested that battery and the internal heaters work great, but you should put it somewhere where the heat that is created stays in the battery.
Those cells are very dangerous to use. stick to LiFePO4 or LTO. Cobalt based chemistries can experience and awful thermal runaway when over charged. This can occur if you have a shorted fet in your BMS. Which can happen from inrush current or high voltage.
And there is zero corporate interest and I pay for it out of pocket. It is free for everyone! We have head engineers of solar equipment companies interacting with people in third world countries. it's really great!
Where would you get the idea that I am not "well meaning"?!? The majority of my videos are exposing scams and rips offs. I constantly bash companies that do a bad job and back up everything I say with evidence. There are extremely ignorant comments here from people who have no clue what they are talking about. I work with batteries every single day and talk to head engineers that are leading the space, and everything I say can be backed up with recent battery studies. There are numerous comments here suggesting to use cobalt based chemistries that can burn your house down and everyone is fine with that? It's ridiculous. I am mad, and this type of ignorance is why I make my videos. I love criticism, but the comments in this thread are plain ridiculous. I am not familiar with this site and that is my fault, but geez, saying I'm not well meaning?? Why?
Why?? I must admit, I don't use this website, but a close friend does. I am blown away by the ignorance in understanding lithium ion batteries here, and seeing people here try to crtiicize everything I do pisses me off. How would you feel? I cover safety more than any other channel and constantly work to bring the best diy solar videos online, and this is how people respond? I love criticizism, but this is just silly. People here are fighting for lead acid and saying they are superior? And I don't think they are joking either. Also getting a lot of people mentioning to use recycled cobalt based chemistries that can set your house on fire? This site is dangerous. On my forum we have actual electrical engineers who will destroy you with evidence and list relevant literature. On this site, it is emotions based and no one knows what they are talking about. It's wild. I am mad.
Like what?! Can't any of you people backup your claims. It's just empty complaining on this site without evidence. It's driving me nuts. Show me what I said or have done that was wrong.
I usually always wear eye protection. YouTube deletes comments constantly. And leaves the spam comments. Have you not used YouTube in the last ten years? I can't stand it
Just because I am young doesn't mean anything. I know what I'm talking about. I started coding and building robots when I was 13, and circuit design at 15. Solar power is dead simple.
Yeah I can work with raw terminals because I don't make silly mistakes. I've been working with low voltage DC for decades. Most of the systems I throw together are for educational use. Those balance wires were probably a rapid prototype pack where I was testing something. I know what I'm doing and how it works. And wow you're so dramatic about the balance wires why don't you criticize the companies that offer their pack configurations in ways that you complain about? There are many companies that throw these packs together and sell them to unsuspecting people, and you are giving me a hard time when making a quick pack to educate or test something? Give me a break
Will Prowse here. Are you kidding me? Those lead acids are kept at a high state of charge and not deeply discharged. Sure some expensive FLA can last much longer, but they are garbage. The coulombic efficiency is horrible. The internal resistance is awful. If I sold lead acid batteries, I would make way more money. You have no clue what you are talking about. And yes, when used for solar and deeply discharged, your lucky to get 3-5 years.