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
10 |3000 characters needed characters left characters exceeded
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

1 Answer
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.

1 comment Share
10 |3000 characters needed characters left characters exceeded
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Matthias Lange - DE avatar image Matthias Lange - DE ·

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