Lithium cost keep dropping!

BFL13 wrote:

NRALIFR wrote:

S Davis wrote:
Just finishing up my first 280ah pack, still need to torque all the connections, trim the all thread and add acorn nuts.

Eve 280ah 12volt cell

What is the form factor of the complete unit? The battery box in my camper will accommodate a single group 31 battery, and I currently have a VMAX agm. When I replace it, I’m going to be looking for a lithium group 31 with the highest AH rating. The highest group 31 I know of currently is around 155AH with BMS.

:):)

With LFP no gassing you can carry them anywhere, so the TC battery box size is not a limitation. Routing the wires might be the only factor……….

Main thing is you are not stuck with the existing battery location.

That’s true, but I’ve got a lot of work invested in improving the wires and accessories associated with the battery box so I’ll have the main battery in there regardless. That’s also where the Trimetric shunt and shutoff switch is. Just from a battery packaging standpoint, a drop-in group 31 with its own BMS and a lot of AH’s would work best for me.

About 9 months ago I was given these two U1 40AH lithium batteries that were salvaged out of hospital med-carts. I’ve cycled them in parallel about a dozen times with a 150 watt heater, and they’ll run it for about 6 hours. They’ve been sitting idle for a couple months now, and they’re currently at 13.18 volts @ 55°.



One of my winter projects is to install these inside the camper to be used solely for our 12v mattress heating pad. I’ll have them on a battery switch so they can be isolated from the main battery at night, and combined for charging. If the mattress heater flattens them, it won’t be a crisis.

:):)