Solar and Backup Systems: What to Check in Regulations

PV and batteries form part of the home’s electrical installation. Assess operating modes, compatibility, protection and location.

PV, inverter and battery

ZeroHouse recommendation: define grid-connected, islanded or combined operation. Verify compatibility for specific models and versions, not just matching nominal voltage.

DC and AC protection

Both sides need coordinated electrical design. Device ratings and types cannot safely be selected from a universal online list.

Backup circuits and grid interface

Check which outputs remain powered during an outage and whether additional transfer equipment is needed. Confirm connection and generation arrangements with the operator and current official rules.

Cables, fire and maintenance

Coordinate cable routes, penetrations and battery location with fire considerations and access. Manufacturer temperature and clearance requirements cannot be transferred between systems.

Roof integration

Check loads, fixings, penetration sealing and roof-maintenance access. Electrical suitability does not establish roof suitability.

Evidence before procurement

Obtain current documentation, a system diagram, compatibility evidence and agreed tests. This guide does not provide unverified power thresholds, tariffs or procedural exemptions.

ZeroHouse assessment diagram; not a construction detail.

Project review matrix
Item	Parameter	Check / result
Components	Compatibility	Documentation
Building	Loads + fire	Coordination
Grid	Modes	Operator + tests

What this means for your project

Request review of the complete system, including the roof and backup circuits. Retain the approved diagram for future changes.

Sources and scope of review

Checked: 2026-09-09. Editorial guidance; not evidence of compliance for an individual building.