Guru
Joined: 13/10/2014
Location: AustraliaPosts: 2172
| Posted: 09:01am 22 Dec 2025 |
Hi Mike, I was wondering about the Battery modules and how they might build a system that was economical, and handle various battery bank voltage/power levels as they were stacked in various power configurations in an installation for a given Inverter & solar controller.
If the battery compartments are anything but cold (ambient temperature) then each battery box must have a high voltage generator inside with each output being paralleled as extra banks are added, something you suggested earlier on, unless I misunderstood. Similar to some quality smaller 5/10kw HF inverter on steroids.
I have around 36kW of LiFePO4, the batteries run cold with a 14.6 kW load on the Inverter (no solar), as does the BMS. The balances shunt power around between cells in a bank, so only consume power internally from the battery cells as a result of the cell levelling action, and these can run slightly warm at a few Amps of balance, but that's with some suspect Cells a few years old and the bank close to 90% SOC, with a new system they should hardly be running.