About These Cells:

This auction is for high quality Chinese made Lithium Iron Phosphate cells.  They are guaranteed to have at least 28.5 amp/hours per cell given proper testing conditions.  These are spectacularly powerful cells.  They can safely discharge at up to 8 times their current rating (8C) for short durations and 3 times current (3C) for continuous use.  That means this:

Given Amps X Volts = Watts, (8x30) 240 amps x 3.2 volts = 768 watts per cell short duration! (or 288 watts continuous per cell)!  So this quantity of cells is safe to give 86,000 watts at 8C or 32,256 watts at 3C.  This kind of tech is why Teslas are ludicrously fast.

This quantity is 10.7 Kwh of LiFePo4 Prismatic cells.  That means they (within tolerances and temperatures) can put out 10,700 watts for one hour, 5350 watts for 2 hours, 2675 watts for four hours, 1337 watts for 8 hours etc - with faster discharge rates being less efficient.  This quantity of cells can be configured to nominal volts of 12v (4 series 28 parallel), 24v (8s14p), 48v (16s7p), 96v (32s3p w/16 leftover), 108v (household DC 36s3p w/4 leftover) etc.  In 12 volt setups these are good for RV energy storage.  Home based battery backup for solar or wind is often used at 12v, 24, or 48v depending on supporting equipment.  Electric bicycles can go for miles on these cells!  For EV uses, any voltage is possible based on number of cells purchased.  While these cells can give out phenomenal power in smaller pack sizes after some experience with a 3 Kwh pack and a 4000 watt inverter I would recommend at least a 2 to 1 rating between battery bank size and inverter size.

If you are trying to power your house overnight you can do some manual tracking of your Power Meter for your house by recording the number of kw hours before dark and in the morning and subtract the former from the later.  After many nights of this, you'll have a good idea of how many Kwh you'll need to make it through the night.  And I would add 10-30% to that number to make sure you don't have to fully discharge every night - thus extending the life of the pack.

DIY Pack

In the past I would solder these cells together, but these days I use long bolts with nuts and fender washers to hold them together.  I just finished a 9.98kwh pack with 104 of these cells and installation was super easy.  I will upload a video soon with what I've done.  Just follow my youtu.be channel through the below links.

Here is a video of these cells out of the box:  https://youtu.be/Qemtjv0Y6mE

Here is a video of my previous 24v pack with the current flowing through the bolts:  https://youtu.be/xpXFSlLAnRQ

And here is one where I show you how it can fit in a Home Depot bin: https://youtu.be/xMCxfZjgz88

Describe

Nominal voltage: 3.2V Nominal capacity: 30Ah typical Discharge power: 3C Continuous, 8C Peak (10 sec)