150V 45A MPPT - roll your own


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flyingfishfinger
Senior Member

Joined: 12/09/2020
Location: United States
Posts: 113
Posted: 07:34pm 17 Nov 2023      

Thinking out loud: The output side is also zero at night. The controller does require some current to run, but that is derived from a regulator connected to the battery terminals, so THAT current does not pass through the output sensor. We should be ok there.

Another consideration: Since we are effectively compensating for temperature drift at night only, we would still be accumulating error during the day when it warms up. So we are only solving half the capacity problem, maybe a bit more than half if we assume that a calibration in night mode near morning and evening reduces the error relative to daytime temperatures. Can we do better?