Disclaimer: Eventually this question is very trivial for the experts, but I simply could not find something when searching the internet and the forum. Please refer me to a thread if there is something.
I have LiFePO4 solar batteries, that are normally charged directly by solar panels. The battery has its own BMS and MPPT and separate input and output MC4 connectors. Perhaps important: the voltage on the inputs is 0V if I measure it directly.
My wish is to have a AC possibility to charge the batteries (with excess energy during strong sunshine phases), as this makes my whole system more efficient and flexible. This is possible through lab power supplies (Labornetzteile) with ~28V and 10A (or less). The input of the battery supports 12-59V and up to 500W.
Question: Can I use the Victron IP22 24/16 for this purpose in LiFePO4 mode? Will the charging start, even when there is no voltage on the input measurable? Normal lead-acid chargers would try to detect a battery to be present via the voltage, but this would fail here. Is this different in the LiFePO4 mode? I don’t have a charger with Lithium mode, so I can’t test.
In case this works: would someting argue against charging 2 or 3 of the solar batteries in parallel with the IP 24/16 (3) version? I guess the batteries will only accept as much energy as they can handle, due to their own BMS - the lab power supply also goes to 0A/0W when the battery considers itself full.
I consider to get the IP