#Solar Installation: Wiring, Siting and Grid Set-up

Installation is the stage where choices become permanent. Panel orientation, string layout, inverter placement and cable runs are all cheap to get right on paper and costly to revisit once the roof is closed and the array is commissioned.

String design deserves more attention than it usually gets. Panels on different orientations belong on different MPPT channels, because an inverter forced to find one operating voltage for an east string and a west string picks a compromise that shortchanges both. Most current residential inverters from Fronius, SMA, SolarEdge and Huawei offer at least two independent MPPT inputs, and using them properly costs nothing at install time.

Three-phase supply changes the calculation again. A three-phase inverter can balance output across all phases, which matters if the local grid operator meters per phase rather than netting across them. Get that wrong and a house can be exporting on one phase while importing on another, paying retail for power it generated seconds earlier.

Balcony and plug-in systems are a separate category with their own rules. EU regulations were rewritten for 2026 (European Commission), and the limits on inverter output, notification requirements and socket types differ enough between member states that a kit legal in Germany may not be legal next door.

Battery sizing belongs to this stage too. Oversizing storage to cover a rare winter week means paying for capacity that sits idle for ten months. Undersizing means exporting the evening surplus at a tariff that may be a fraction of the retail rate.

The guides gathered under this tag cover each of these: how a domestic install is scoped end to end, how the inverter comparison actually shakes out, and what a realistic battery figure looks like for a specific household load profile.