I am using a Smart Shunt on the input side of another brand PWM solar charge controller for an experiment. Originally, I had the Smart Shunt incorrectly set to "battery monitor", but it was consistently reading ~115-130A in full sun.
Then I changed the "Mode" to "solar charger" on the Smart Shunt, so that its data would be used properly by the the VRM. After that, the highest current reading I see is 80A, even in perfect sun. I did make the mode change in daylight, while drawing about 100A.
Is it possible the device resets its calibration when changing modes? Is there anything else that might cause a change in how the current is counted or calibrated when doing that?
