Glossary
Microinverter
A small inverter that turns DC power from one or a few panels into mains AC. In a plug-in kit it enforces the 800 W output limit.
Solar panels produce direct current (DC). Your home runs on alternating current (AC). A microinverter sits between the two, usually handling one to four panels, and feeds AC into your wiring through the kit’s plug.
In a plug-in kit, the microinverter is what keeps the kit legal. The law caps a plug-in microgenerator at “a maximum rated alternating current output not exceeding 800 watts” (SI 2026/848). The product specification sets 800 VA and 3.5 A at the socket, allows up to 2,000 W of panels, and limits the DC side to four modules, no more than two in series, no more than 120 V DC at the inverter, and no Y-connectors (IPS §4.1, §4.2.2).
One practical point: a microinverter sold on its own is not a compliant plug-in kit. The ENA register accepts plug-in solar entries only for the complete unit (panels, inverter and mounting), not for inverter-only products (ENA Connect Direct). Check that the whole kit you’re buying is listed.