Can I connect the battery terminals from 2 of my MPPT SCC in series to charge a 48V battery array?

RendyIrawan

New Member
Joined
Oct 4, 2021
Messages
1
I have a 24V battery array connected to 2 MPPT SCCs in parallel. The battery array is used to to power a 24V off grid Inverter, but I'm planning to switch to using a Grid Tie Inverter with a limiter. The problem is, the GTI runs on 48V. Reconfiguring the battery array to output 48V won't be a problem for me. The problem is that my MPPT SCC only outputs 24V on the battery terminals. if possible, I don't want to have to buy a new 48V MPPT SCC and discard the 24V MPPT SCC. Is it possible to just connect the 2 battery terminals of the MPPT SCC in series and use that to charge the 48V array. I found this schematic online, and I was wondering whether it's safe to connect the SCCs to the batteries according to this schematic. Any suggestions would be appreciated. Thank you for your time fellas! IMG_2604.jpeg
 

Rednecktek

Solar Addict
Joined
Sep 8, 2021
Messages
425
In general, no. Please don't connect the SCC's up in series, the electronics don't handle it well and there may be greasy orange smoke.

What make/model SCC do you have? Every MPPT controller I've seen auto-detects the battery voltage when you connect up. It would be a pretty weird model that can't do a 48v battery bank. Even my cheap PowMr MPPT controllers will do 48v.
 
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