Monitor beyond cell voltages
Reporting on cell voltages is not enough.
Cell bolt temperature, bypass current and accumulated bypass mAh all give early warnings about battery health and other characteristics vital to the battery pack.
Early warning avoids permanent damage.
WatchMon4: battery supervisor
☼ On board logging of key metrics for 10 years ☼ Remote access via WiFi with technician software ☼ ESP32 processor more powerful than WM1 ☼ pluggable screw terminals to simplify installation, allowing pre-made cables for both shunt and cellmons ☼ 2x onboard FET outputs 4A with 8A inrush + 2x onboard inputs for circuit breaker trip sensor ☼ Limit power to inverter / charger if required ☼ Include battery SoC% ☼ Expansion available for additional controls ☼ Built-in 8v to 65v DC-DC supply