Record what was actually commissioned
At handover, ask the installer for the final solar, inverter and battery equipment details, the commissioning date and the applicable electrical compliance documentation. The installed configuration should be recorded, not just the original sales proposal. A substitution, additional battery or changed inverter setting can matter when you later ask for service or join a VPP.
Keep the network connection conditions with the installer’s documents. Ask the installer to explain any export limit, system-control requirement and backup arrangement in plain language. Knowing which circuits, if any, have backup capability is more useful than assuming the battery powers the whole house during an outage.

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