I have a system which measures the power generated by a solar panel, amount of power being fed into the battery through the charge controller and then the powersupplied to the load. In order to keep the current from the solar panels separate from the current being fed into the battery to charge it, I have three separate current loops - 1. for the solar current 2. for the battery current 3. for the load current.
The load and battery parameters - voltage and current being measured are referenced to the battery ground. However the solar voltage cannot be referenced to the battery ground since there is a charge controller is between that is a bought out device. Hence I am not sure of the ground connections. So essentially if I measure the solar panel voltage referenced to the negative input of the charge controller or the negative terminal of the solar panel, then how do I make sure that I can compare the voltage levels across the panel, battery and load.
Any suggestions?
The load and battery parameters - voltage and current being measured are referenced to the battery ground. However the solar voltage cannot be referenced to the battery ground since there is a charge controller is between that is a bought out device. Hence I am not sure of the ground connections. So essentially if I measure the solar panel voltage referenced to the negative input of the charge controller or the negative terminal of the solar panel, then how do I make sure that I can compare the voltage levels across the panel, battery and load.
Any suggestions?