I want to try and make a power monitoring system for an off-grid solar system using a micro-controller (esp8266). I started by monitoring the battery voltage (using a voltage divider and an ADS1115) and the current between the battery and the PWM charge controller using an ACS Hall effect current sensor. I connected the battery ground to the ESP ground to measure the battery voltage. Next step is to measure the current and voltage of the panel. Firstly, I thought to do the same thing with the panel (common ground panel-battery-ESP and current sensor), but then I disassembled the PWM charge controller and noticed the panel and battery positive terminal is actually connected directly to the battery positive terminal.
- What will be the next step to measure the voltage of the solar panel? Or should I change the whole method?
- Is there a way to isolate the micro-controller circuitry from the solar power circuitry to measure the voltage and amperage of battery and solar wires?
This is what it looks like now -
Would love any other suggestions! Thanks