Hi Everyone!
I recently switched out my ve.Bus BMS v1 to a v2 to gain the ability to change the Multiplus' mode via Cerbo.
After a few other minor changes to my system, I decided to test things out by running a small heater (1200W) off the Multiplus 12/3000/120 and connecting/disconnecting shore power. The Multiplus inverts/passthru's to the heater no problem on shore power.
When I disconnect shore, within ten seconds the "Cell>2.8V" light on the BMS v2 dims, the Battery protect loads and Multiplus are disconnected, then the light goes back to its normal state.
Video of BMS v2 light: https://share.icloud.com/photos/083ehnez2dHPMvxTfppoV9YuQ
Smaller loads operate fine when inverting. The 2nd largest load I put on it was an Ecoflow AC pulling around 400W.
I switched back to my BMS v1 and it seems to be operating fine without issue at any load. Battery voltage at the Shunt and metered at my Multiplus are normal.
I also tried powering my Cerbo directly off the BMS v2's GX-Power port hoping it would stay powered long enough to give an alert or anything useful to troubleshoot, but it powered off at the same time the rest of the loads did.
My batteries are two 90Ah non-smart LiPo4 Victron batteries.
All firmwares are up to date.
Any suggestions?
Before trying another BMS v2 do you think its worth rebalancing the cells? Both batteries have been wired in parallel for a few years. This is the guide I would use: https://www.victronenergy.com/media/pg/Lithium_Battery_Smart/en/troubleshooting-support-and-warranty.html#UUID-0f0024ba-601b-5aa2-67b4-e2ca8d7c7b45
Any help would be greatly appreciated!
