Recent content by plaidcabin

Check with the manufacturer or seller before using 12v lithium batteries in series, the bms and internals might not be up to the task. Better to assemble your own batteries with BMS rated for the voltage you want to operate at

Absolutely, the closer your range remains to 50% on these batteries, the longer they last. But Lithiums doing the daily grind while the SLA's trickle charge and sit ready for stormy weather is a pretty awesome combination, I'm tempted to put some into mine as well...

It likely gets lost in the pages, but for those that have missed it: the missing bus bars while charging were most likely the cause of the fire. He still has plenty more of the cells and will be working much more carefully going forward. Burning down his trailer certainly devastated him...

Stumbled upon this gentlemans approach to mixing battery technologies, and gotta say, I like the sound of this. I am running 100% Lithium right now, but my brother has a large Lead Acid system and wants to add some Lithium Iron Phosphates to his, using this method. He would be building his...

Fair point

That photo is of a partially disassembled battery, with no voltage present. Those cells would need to be removed and charged to be dangerous.

As far as we can tell they are LiFePo4 batteries, and I believe they were listed/sold as such

Supervstech called it in comment #28, the missed bus bars caused the fire.

He bought them in crates this year. Apparently a string of about 40 in series comes out of the crate at something like 3v.. so very very very low voltage in storage. They have never been charged, not once. The project that they were manufactured for was cancelled years ago. I have no idea how...

I am aware of this, and again, that is how I reacted. The guy who currently has crates of them, and burned his trailer down, insists that they are coming out at nearly 0v.

They are not discharged to 0v, they are uncharged at nearly 0v. New old stock. I reacted the same way initially, but that is just the way these crates came. Something to do with shipping and high voltages, iirc

The Cells are being sourced from these large batteries. When he opens these crates for the first time, all of the cells are at nearly 0V and require charging.

Stored at 0v, never been charged before.

This seem as good a comment to address as any. I have invited the owner of the burnt trailer to the forum, and indeed he has browsed here before and was inspired by Will Prowse's youtube channel to get into Solar Power and LiFePo4 batteries. He is not an electrician by any means, as the fine...

I don't have much information on the system, I think he had an all in one Grow Watt inverter and was using grade B 80AH cells. Bloating has been observed in these cells, for what ever that is worth.