Victron system in my RV. 50A grid connection always connected. (4) 24v100ah LiFePo4 batteries in parallel, MPPT, solar panels, Cerbo GX, Victron BMS, Multiplus-II, etc. RV has 2 ACs, one on L1, one on L2. When we’re not there, we keep the main unit AC on 90* just to keep the RV from baking itself…
Over this past summer I occasionally get L1 overloads that shuts the system off. Eventually, it resets but I can see the errors in the remote console. I was on location this past weekend and saw it first hand.
My first thought was overheating, but the weather was pleasant - only high 80’s outside. I did open up the compartment to feel for any heat, nothing was hot, inverter shell was fine, cables were all cool…
Next thought was to see if consumption was too great… ACs are a 15k BTU (main) and 13.5k BTU (bedroom), both with soft start systems. I’m pretty sure that the fridge and the main AC were the only things running at the time of the events (maybe an LED light or 2).
14:17 - AC consumption looks to be 0:
That doesn’t make much sense… Zooming in doesn’t give anything else.
17:21, things are flipping:
Still, doesn’t make sense as L1 load is minimal leading up to this. Overall, 1500ish W is the highest consumption that I see. One potentially interesting data point is when looking at the batteries at this same time frame:
It appears that I was running on battery, not grid, on both of these events. The system is set up to prioritize batteries and use the grid as little as possible… One other point of note, the advance charts don’t seem to reflect whenever both ACs are running, which is odd. On the Cerbo panel I can certainly see the consumption over 1500W when both are running… I would have expected to see the AC consumption charts show both L1 and L2 pulling watts occasionally.
Thoughts on what to look for here? Possible causes? Temps are cooling down here so the ACs are about to see minimal use, but I’d like to figure out what is going on so i can be prepared for next summer.