In this video I (try to) explain how I used battery current readings and the battery state of charge, to display gauges on my Home Assistant dashboard showing the amount of battery time left based on the current inverter load. It adjusts as the battery level (SoC) drops and as the loads change.
But it was not all plain sailing as some oddities arose which needed to be accounted for, and I also expand on these. Two issues I had were to estimate time left when the battery is actually charging, and also how to deal with very small loads that show unrealistically long projection times.
As I explain in the wrap up, even if you have a plain battery inverter or other device that does not have the MQTT protocol, or have Modbus registers that can supply this information, there are other innovative ways of reading loads, voltages, and currents that may also work for you. So this video need not only be for those using Victron or similar solar systems.
Watch https://www.youtube.com/watch?v=9iTQG_xw0Zs
#technology #batteries #timetogo #solarsystem #homeassistant
source https://gadgeteer.co.za/monitoring-battery-time-to-go-on-solar-systems-or-inverter-systems-how-to-calculate-and-display/
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