Hey Guys,
For my PV installation I make use of four lead acid batteries in series.
I thought these lead acid batteries would be toast by now but they are still working fine, they charge/discharge a few killowatt-hours per day.
I am making a battery wall with rows of 18650 fused cell holders and a bms as a battery upgrade.
The lead acid batteries have a temp sensor plugged in and for the Li-ion there can be an rs485 connection+temp sensor to the inverter.
I was thinking about an (auto) switch that can switch between battery systems with some sort of precharge, or a system that could combine the two batteries.
Do you have any ideas or could you identify problems if i were to just connect the two in parallel.