Only one design of battery onboard and it’s Lifepo4

[Fuss]

Originally Posted by mcarthur

Thank you. Our lifepo4 will be 48v, so direct connect to engine, bypassing BMS, isn't possible since our starter is 12v (or can be 24v). But it is interesting to hear you're bypassing the BMS to deal with the starting load, and also to hear you got 75-25 on the Both in conjunction with a lead acid. Thanks.

You can tap 12v out the the 48v bank just for starting, this will cause no problem at all as it is not a constant tap, just a starting the engine tap.
Then to run the 12v engine and engine instruments, use a 48- 12v victron converter.
Thats effectively what I just started doing.

[pbiJim]

I got my first LiFePo4 battery about 6 months ago. It primarily gets used to run a trolling motor. It also gets used to run an inverter at times. It has had infrequent use & has sat at 100% SOC for 80% of the time. I just ran 3 cycles from full discharge @ about 50 amps to full charge with a 35 amp automatic smart charger that is set for the correct chemistry. On the last charge, I monitored the amp hours. They read 96. The battery is specified as 100AH. Unfortunately, I did not do a similar test when the battery was new.