question

nelsonpk avatar image

Screenshot questions

I assume that the Solar numbers are the output from the panel & the Battery numbers are the output from the 75/15 MMPT controller.

why is the current / amps higher than panel output?

My BMV 700 shows the actual amp input somewhere in the middle of these 2 numbers.

Screenshot_20210913-101244.png

battery charging
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klim8skeptic avatar image
klim8skeptic answered ·

Power into the mppt pretty much equals power out, minus some small losses.

Power = Volts x Amps.

22.51v x 4.7a (105w) into the mppt would equal about 14.58v x 7.1a (103.5w) out to the battery.

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So the regulator reduces the Volts which then increases the Amps.

The Battery numbers are what is actually going to the battery?

Current into the battery excludes any loads running.
Thanks