The MPPT regulator on the BatteryPlus35-II-SR or BatteryPlus35-II-HA is designed to cap the solar input to 30A.
This allows you to utilise 420W or greater on the roof of your caravan, which will allow you to
fully maximise the potential of the MPPT regulator.
If you have a BatteryPlus35-II-SI, the solar input is capped at 20A.