RESIDENTIAL

Residential solar PV battery backup single line diagram

This residential electrical single line diagram shows a solar PV and battery backup installation for a 120/240 V home. The utility meter and 200 A service disconnect feed the main panel. An 8 kWdc rooftop array connects through a DC disconnect to a 7.6 kW hybrid inverter, which also connects to a 13.5 kWh battery. A backup gateway feeds a separate panel for selected circuits.

UPDATED 2026-09-23

TYPESld

USE-CASEResidential Electrical

EXAMPLEResidential solar PV battery backup single line diagram

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CASE ANALYSIS

Scenario

This home combines rooftop solar with battery storage so selected circuits remain energized when the utility supply is unavailable.

Key decisions

PV isolation: An 8 kWdc array has a DC disconnect before the hybrid inverter.
Battery coupling: A 13.5 kWh battery connects to the hybrid inverter.
Backup boundary: The gateway separates selected backup circuits from the main service panel.
Essential loads: Refrigeration, lighting, and critical outlets are individually protected.

When to reuse this

Use this for a grid-connected home with a backup loads panel. Utility interconnection, battery fault protection, and local rapid-shutdown rules require detailed design.

FAQ

Frequently asked questions

What does the backup gateway do?01

It isolates the backed-up circuits from the grid during an outage and coordinates the inverter source.

Can this run every circuit in the house?02

No. This drawing intentionally supplies only selected essential loads from the backup panel.