More on LFP Charging
Some "sales" statements here, but also some possibly good info of interest. One thing is they found longest life (most cycles) was to charge at 14.4v but at lower amps at 0.3C. Some LFP owners o...
Forum Discussion
time2roll,
I have twin battery banks. My biggest charging source is a Magnum 3000 watt inverter/charger. It maxes out at 127 amps. The recommended maximum charging rate for the existing telecom jars is 107 amps, or about 19%. If I did go to LiFePo4, I'd still not be able to charge them significantly faster without getting a larger inverter/charger.
My personal choice for replacements would charge at 0.25 C and do not taper. Assuming 400 amp-hours charging would be 100 amps. LiFeP04, again assuming 400 amps would be 120 amps. That would mean 20 minutes less charging time on Li. But Li don't even enjoy being charged to 100%--so in real terms there may be zero difference in charging time.
There is a savings in cost especially if you "roll your own" Li. But as I do use my RV at -37 c (-34 f), Li are pretty much not going to happen. As to having them in the heated area of the RV There would have to be major modifications to make them fit in the heated space. If I were still full time it could work. However, I'm personally not comfortable with ANY house bank inside the living quarters.
In short, LiFePo4 are great where it is warm--but not too hot either. They simply do not meet my particular needs.
I have twin battery banks. My biggest charging source is a Magnum 3000 watt inverter/charger. It maxes out at 127 amps. The recommended maximum charging rate for the existing telecom jars is 107 amps, or about 19%. If I did go to LiFePo4, I'd still not be able to charge them significantly faster without getting a larger inverter/charger.
My personal choice for replacements would charge at 0.25 C and do not taper. Assuming 400 amp-hours charging would be 100 amps. LiFeP04, again assuming 400 amps would be 120 amps. That would mean 20 minutes less charging time on Li. But Li don't even enjoy being charged to 100%--so in real terms there may be zero difference in charging time.
There is a savings in cost especially if you "roll your own" Li. But as I do use my RV at -37 c (-34 f), Li are pretty much not going to happen. As to having them in the heated area of the RV There would have to be major modifications to make them fit in the heated space. If I were still full time it could work. However, I'm personally not comfortable with ANY house bank inside the living quarters.
In short, LiFePo4 are great where it is warm--but not too hot either. They simply do not meet my particular needs.
