question

griffint avatar image
asked · Aug 2, 2019 5:08:40 PM

Two 12V Panels, MPPT controller, charging a 48 Volt Battery Bank

Am I able to charge a 48 Volt battery bank (Four 12V batteries connected in series) with two 12 volt solar panels with a 75/15 MPPT charge controller in between?

battery chargingvoltagebattery system voltage
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wkirby avatar image
wkirby answered ·

No, the MPPT controller is a Buck converter not a Boost converter. It cannot "step up" the PV Voltage.
PV Voltage must be higher than the battery Voltage.

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Matthias Lange - DE avatar image Matthias Lange - DE ♦ ·

Plus a 75/15 can only handle 12V and 24V batteries.