LifePo4 Voltage at .5C - .6C Discharge
Our two GC2's (with 100% charge) drop below 12v while under a 100a - 125a load. When they reach 50% (at 100a - 125a), voltage drops into the low 11's while under-load. What kind of under-load volt...
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With jumper cables to the LFPs, it might be possible for voltages from the truck to be wrong for your LFPs? 15v at first? It depends on the truck I guess.
At least with the DC-DC charger method, you can pick the right voltage and it has a buck/boost in it to bring the truck's voltage up or down to the chosen LFP charging voltage. The truck's voltage would get to 13.x soon after starting, reducing the amps? You can pick 14.6, 14.4, 14.2, or 14.0 and it stays at that doing constant X amps (40 for the 40 amper. ISTR a 60? that would pull 90a) It does not do a Float voltage with LFP. You turn it off manually or if you have it wired that way, by turning off the ignition.
At least with the DC-DC charger method, you can pick the right voltage and it has a buck/boost in it to bring the truck's voltage up or down to the chosen LFP charging voltage. The truck's voltage would get to 13.x soon after starting, reducing the amps? You can pick 14.6, 14.4, 14.2, or 14.0 and it stays at that doing constant X amps (40 for the 40 amper. ISTR a 60? that would pull 90a) It does not do a Float voltage with LFP. You turn it off manually or if you have it wired that way, by turning off the ignition.
