There is only one other bms on the market that the low temperature cut off actually works and it a 100a. And there out of stock so you’ll have to wait for that slow ship from China to get here. 120a is a minimum parameter for coffee. Microwave, and hair drier. A happy wife is a happy home is what grandma always said. I have talked to the owner, he very personable and knowledgeable and eager to please. It’s a great product. So get one before he runs out too.
After installing this I put it through some tests ( I’m no engineer or designer). It keeps the Future lithium batteries and there not cheap and there’s 8 of them to make 12v 200ah pretty close to .002 of each other on fully charged and when it’s low. That was my first concern. I’m solar and it’s “in” my front cubby of my travel trailer under my head when sleeping. Safety First. It cut off the charging at 14.4 volts and let it come to rest at 13.6 volts. When bad things happen they over charge. Test one a success. Test two I set the discharge to 12.2 and discharged till it shut off again it passed and shut off at 12.2 and did my bottom balance (I have two battery banks). Ok even though I’m a fair weather boon docker and don’t camp in freezing weather there are times while the rig is in storage, in the winter, it does freeze. Time for low temperature test.... I did Will Prowse’s frozen banana test.... and it shut off. Way to go. I also ran a pod coffee maker and a hair dryer, no problem. Some one with more experience “Will” have to push the bms to see the full capacity. But for me, I feel safe, and my investment is safe. One last thing SOC (state of charge) so many times you go to sleep at night thinking just because your batteries read 12.6, or better you’ll have great batteries in the morning. NOT. First cup of coffee and your remote says 11.9 v. Remotes don’t tell you how many ah you have, only volts. The WiFi app tells you exactly how many ah you have and that’s the “real SOC”. Not the volts. And it lets you monitor your balancing batteries and fine tune your battery parameters.
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