Template · Solar and storage

PV supply-side connection single line diagram

Line-side tap with a fused, service-rated PV disconnect. Use this when the panel bus cannot take a backfed breaker. The PV connects on the line side of the main breaker instead, through its own fused disconnect.

A free template with typical ratings, conductor callouts and general notes. Open it, change what differs on your job, fill in the title block and export a PDF.

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PV supply-side connection single line diagram: line-side tap with a fused, service-rated PV disconnect. — PV supply-side connection. 8 devices on an 11 × 17 in sheet with a title block and notes column.

What the reviewer checks on this drawing

The reviewer checks that the utility and the AHJ accept a supply-side connection, that the PV disconnect is service rated with the neutral bonded in it, and the fuse size against 125% of the inverter output.

What the drawing shows

Every device on the sheet, in the order power reaches it.

Symbol	Label	Rating or detail	Conductors feeding it
Utility source	Utility service	120/240V 1φ 3W
Meter	Utility meter	200A socket	Service conductors, per utility
Device	Supply-side connection (TAP)	Listed connectors in rated enclosure
Circuit breaker	200A 2P	Existing main
Panelboard	Main panel	Existing 200A
Fused disconnect	PV disconnect	60A fused · 50A fuses, service rated
Inverter	String inverter	9.6 kW · 240V · 40A	3 #6 Cu + #6 G
PV array	PV array	26 × 400W = 10.4 kW DC	PV wire #10 Cu, 3 strings

Notes on the sheet

Supply-side connection per NEC 705.11. The PV disconnect is service equipment: neutral bonded to the enclosure.
Inverter output 40A × 125% = 50A fuses.
Confirm the utility and AHJ accept a supply-side connection before design.

Diagram is schematic and not to scale. Field-verify existing equipment ratings. Ratings and conductor sizes shown are typical. Confirm against the adopted code, the equipment listing and a load calculation before installation. Code references are to the 2023 NEC and the 2024 Canadian Electrical Code: see references and editions.