lowest price LI I've seen no solar charge controller needed?

[pianotuna]

Hi all,

I bumped into this on facebook. $449.95

" Legion 12V 100Ah LiFePO4 Deep Cycle Lithium Battery, 7000 cycles, Built-In BMS, LCD Screen, 200A Discharge, 100A Charge, Ultra Light, Maintenance Free, IP65. Ideal for RV, Solar, Marine, Off-Grid Apps"

The owner wires 2 in series and claims:

"I’ve verified the charge voltages with solar panels connected directly to the battery with a multi-meter. Once these batteries gets to about 28V it automatically starts to PWM (pulse width modulate) charge up to 29.2-29.4V. Then it cuts off."

www.amazon.com/dp/B0927Z8M1G

[pianotuna]

Here it is in the 24 volt version:

https://www.amazon.com/LiFePO4-Lithium-Discharge-Maintenance-Off-Grid/dp/B0927YZ6KB/ref=sr_1_11?dchi...

[pianotuna]

BFL13,

There is nothing to watch.

Time2roll,

I agree on the bms.

[time2roll]

Works but I don't recommend using the battery BMS to control the charging voltage.
BMS should be there to protect the battery only. JMHO.

[BFL13]

Didn't watch that, but sounds like when I tried a 60 cell 24v panel on a 24v bank. It stalled out at 30 volts. You need a 72 cell panel to go higher.