Error404Wizard
New member
- Joined
- Mar 7, 2025
- Messages
- 3
Got a weird issue with my system setup and could use some insight. Here's what I've got: 12V LiFePO4 200Ah battery, bus bars, kill switch, inline fuses, Victron 100/20 SCC, Victron 500A shunt with temp sensor, Cerbo GX, Outback FM80, and a Giandel 2000W inverter. Started the day with 100% SOC, ran the pool pump and heater for 6 hours in two sessions, no issues, battery stayed around 89-90%. Then out of nowhere, the Cerbo GX alarm went off saying "battery overtemp warning." Shut everything down, checked the battery posts—they were warm, but not too hot. Waited 5 minutes, restarted, no issues. Later, with the pump and heater off, the Giandel inverter starts blaring. Voltage spiked around 14.5V (maybe higher), inverter shut down, but no overvoltage warning from the Victron. Giandel manual says it shuts down at 16V ±0.5V, so it might've hit that. Looking at the VRM reports, the Victron SCC went through multiple absorb/float cycles, battery temp hit 122°F, then cooled off. Lowest recorded voltage was 12.6V, current hit -55.3A, and the inverter shut down at -697W power draw. The pool pump was running at higher RPMs than usual, maybe pushing past the 60A continuous limit. Anyone seen something like this? What's the weak point here—battery temp surge, inverter voltage spike, or the pump overdrawing?
