We chose the 4 x Victron MPPT Solar Charge Controller 150/85s for the following reasons:
- To provide the shortfall of estimated kilowatt hours needed per day versus what 4 x 20 kW Fronius PV inverters could provide.
- The PV inverters were not planned to use the full 100kW that is needed to supply the energy demand, because this is limited by the total rated charging current of the 10kVA Quattros.
- Some current goes directly to the batteries in the early morning when the Fronius PV inverters are providing energy that is less than that demanded.