Old inverter firmware update. ( Have to update due to dvcc error.) Inverter chipset is 1912115 the VRM portal has said to use 1912209 firmware but I also noticed there is a 1912159 firmware. Which one do I use or do I do both? All answers are much appreciated
That would be non-assistant (115) vs assistant (209) - honestly, I’ve never used a Victron inverter with firmware pre-assistant. The 115 firmware isn’t even in the changelog, but 209 is… maybe that’s an indication of relative age of the firmware.
Updating to 209 or 159 won’t solve the problem.
The old CPU (19…) is not compatible with DVCC.
DVCC needs a new CPU (26…) and at least FW 422, that is not available for the old CPU.