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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There is also eg, the Renogy DC-DC charger. I have the 20 amp size (Truck alternator not huge) by the TC batts and the input to the charger is via 7-pin #4 (some wiring mods there)
The charger itself has an LFP profile you can pick if it suits, and there is no paralleling with the truck batts. Your truck's alternator could take the 40 amper I expect. The charger pulls more than it delivers so a 40 amper would pull maybe 60 amps
Only thing is the Renogy needs 12v to operate, but it can get that from the truck side if so wired. That way it would work if the trailer side 12v were dead.
EDIT-- beware of the polarity with those kind of wire sets. They can reverse in the middle depending. (eg try to join two 12v plugs end to end and get the polarities right :( )
The charger itself has an LFP profile you can pick if it suits, and there is no paralleling with the truck batts. Your truck's alternator could take the 40 amper I expect. The charger pulls more than it delivers so a 40 amper would pull maybe 60 amps
Only thing is the Renogy needs 12v to operate, but it can get that from the truck side if so wired. That way it would work if the trailer side 12v were dead.
EDIT-- beware of the polarity with those kind of wire sets. They can reverse in the middle depending. (eg try to join two 12v plugs end to end and get the polarities right :( )
