I would like to expand our existing system consisting of
- 1 MPPT 250/85
- Cerbo GX
- 48V Battery bank (Pylontech US3000C)
- 3 Multiplus II 48/3000-35
two MPPT charge controllers of the type
SmartSolar 75/15-24V in series to fit into the 48V system.
Is it possible to connect two MPPTs in series for higher voltage output or do I need a step-up-converter and connect the two MPPT s in parallel?
Thanks for your help!