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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Even with no change in the R from wiring and battery, you still do better for staying above inverter alarm at 11v by going to LFP because the voltage/SOC voltages are higher as your starting voltage, for the wiring part.
Your wiring might have a 1 volt drop at 100 amps. Your full 6s start at 12.7 so you see 11.7 as you said in the OP. The full LFP is 13.6v so your 1 volt drop in the wiring will be showing 12.6.
You get the same effect going to AGMs where they have a 0.2v higher v/SOC, so you get an extra 0.2v wiggle room before hitting the 11v inverter alarm. LFP gives you way more wiggle room than that.
Not being mentioned is the battery bank AH, where within the same type of battery, adding more AH to the bank reduces R, so voltage drop is reduced with four 6s instead of two, eg.
I suppose there might be some factor there going from 230AH to 200AH that would normally increase your voltage drop, but could be trivial in the overall improvement from using higher voltage batteries.
Your wiring might have a 1 volt drop at 100 amps. Your full 6s start at 12.7 so you see 11.7 as you said in the OP. The full LFP is 13.6v so your 1 volt drop in the wiring will be showing 12.6.
You get the same effect going to AGMs where they have a 0.2v higher v/SOC, so you get an extra 0.2v wiggle room before hitting the 11v inverter alarm. LFP gives you way more wiggle room than that.
Not being mentioned is the battery bank AH, where within the same type of battery, adding more AH to the bank reduces R, so voltage drop is reduced with four 6s instead of two, eg.
I suppose there might be some factor there going from 230AH to 200AH that would normally increase your voltage drop, but could be trivial in the overall improvement from using higher voltage batteries.
