5.4.1.1 Maximum current of the solar generator
The maximum short circuit current allowed is 22Adc. Over dimensioning of the PV array is
allowed but you have to ensure that the cable sizing and protections are installed according
to the maximum short-circuit current.
In any case, the next3 will limit the PV current and/or the charging current (battery) to the
rated and/or programmed currents. All those limitations are automatically managed by the
next3 and there is no risk in case of over dimensioning the PV input power/current. The power
production is electronically controlled and optimally dispatched in the system due to the PFD
technology (Power Flow Dispatcher).
Note: The PV production could be limited by various other reasons at a systemic level because the
next3 is in interaction with other elements. The battery has a charging current limit which can be
further limited depending on the charging phase or the battery voltage. In offgrid application
when the battery is full, the production will equal the AC loads. The maximal PV injection to the grid
when there is no battery charging is 15kW (3x5kW grid feeding limitation).
5.4.1.2 Solar strings design
The solar generator is normally dimensioned to cover an important part or the entire energy
requirement of the system. Once the PV power has been decided upon, it will be distributed
among one or more MPPT units, wisely combining the modules among them. Modules with
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