Interpreting Renogy MPPT controller readings

skimzzz

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Join Date: Jan 2024

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Interpreting Renogy MPPT controller readings

01-21-2024, 11:16 AM

Have 2 panels in series connected to a Renogy 20A MPPT controller and a 12 V LiFePO4 battery. The PV voltage reads about 30 Volts and the current is about 3 A. How should I interpret the power output? Is it 30 Volts x 3 Amps (90 Watts). Or, would it be the adjusted 12 Volts (for the battery) x 3 Amps (36 Watts)? I know the MPPT will adjust the PV voltage down for a 12 V battery.
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BryceFreeman

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01-21-2024, 10:24 PM

The power output should be 30 Volts x 3 Amps = 90 Watts. Your 2 panels are connected in series so the volts should be double. MPPT will adjust the charging volts to fit the battery, but the output from the panels won't be changed.
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