I purchased four 230Ah LiFePO4 batteries for our new RV. All the batteries were shipped at about 50% SOC. So I wanted to top them off while waiting. But I didn't have a charger that could top off LiFePO4 batteries. But I did have a few solar components laying around that would work just fine.
I used a Go Power PWM charge controller paired to a Grape Solar 200 watt panel with appropriate fusing between the controller and battery. I was able to get about 8 amps of charging current out of this set up. The batteries are 230Ah at 50%, so I need to pump in about 115Ah into each battery. This calculates to about 14 hours of sunlight to top off one battery. I need about 1-1/2 days to complete one. But hey, it works.
I used a Go Power PWM charge controller paired to a Grape Solar 200 watt panel with appropriate fusing between the controller and battery. I was able to get about 8 amps of charging current out of this set up. The batteries are 230Ah at 50%, so I need to pump in about 115Ah into each battery. This calculates to about 14 hours of sunlight to top off one battery. I need about 1-1/2 days to complete one. But hey, it works.
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