Public power district

SMUD interconnection application

SMUD is a public power district serving 601,275 residential customers in California (EIA-861, 2025). Applications: PowerClerk (SMUD Interconnection (PowerClerk)). Gridpol files SMUD interconnection applications for licensed installers – solar, storage and EV chargers – with single-line diagram and site plan, unlimited for $500 a month.

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Process verified from SMUD’s official sources (see below). Fee amount and review timelines not stated; check SMUD Interconnection Guidelines.

SMUD at a glance

Utility

Sacramento Municipal Util Dist

Type

Public power district

EIA utility ID

16534

Residential customers

601,275 (EIA-861, 2025)

Net-metered residential customers

62,657 (EIA-861, 2025)

Service territory

3 counties in California

How to apply

PowerClerk – SMUD Interconnection (PowerClerk) · official link

Who submits

Contractor submits for the customer; self-installers may apply directly.

Export compensation

Net billing – Solar and Storage Rate (SSR)
Exports credited at 9.6¢/kWh regardless of time/season.

Documents SMUD asks for

Interconnection application formOnline in PowerClerk; customer email and phone Gridpol prepares this.
Recent electric billMost recent SMUD bill: account no., meter no., service address (must match final building permit)
Site plan / site layoutSolar site plan Gridpol prepares this.
Single-line diagram (one-line)Labeled one-line or three-line drawing Gridpol prepares this.
PV module spec sheetMake/model/qty of PV, inverter, AC disconnect; PV and inverter must be CEC-listed
Other utility-specific document (when applicable)Proof of advanced inverter settings if applicable; new construction uses separate form

How the SMUD process runs

Apply in PowerClerk and pay interconnection fee
SMUD reviews, contacts if needed
SMUD approves by email incl. required inverter settings
Install; installer obtains local permit/inspection and configures advanced inverter functions
Submit proof of inverter settings if applicable
SMUD sets meter and issues PTO
Billing set up

Fees

Fee	Applies to	Note
one-time interconnection fee (amount not stated on page)	New solar, solar+battery, battery-only (since 1 Mar 2022)	Paid when submitting

Utility fees are paid by the installer or customer; they are not part of the Gridpol plan.

Size levels and limits

Level	Up to	Note

Solar and Storage Rate: up to 110% of last 12 months kWh, or 120% if battery storage added.

Storage, EV and stamps

Battery storage

Battery adds sizing allowance to 120%; battery-only systems also need interconnection; SMUD battery incentives available.

PE stamp

Commercial: CA-licensed PE-stamped single line if using the 120% busbar rule (commercial checklist). – PE-stamped drawings are not included in Gridpol.

Sources

SMUD - Solar for your home: https://www.smud.org/Solar (retrieved 2026-11-13)
SMUD Residential Solar Interconnection Checklist (6/25): https://www.smud.org/es/-/media/Documents/Going-Green/Solar-and-Storage/Residential-Solar-Interconnection-Checklist.ashx (retrieved 2026-11-13)
SMUD - Solar for your business: https://www.smud.org/GOING-GREEN/Solar-for-Your-Business (retrieved 2026-11-13)

Other utilities in California

All California utilities →

Gridpol Unlimited

$500 / month

Unlimited interconnection applications. 12-month agreement, signed online. The agreement starts the day you sign; first invoice right away, then monthly.

Unlimited interconnection applications
Single-line diagram and site plan for every application
Pre-submission check against the utility’s requirements
Homeowner e-signature link for the authorization
Filing in your utility portal accounts or by the utility’s method
Utility questions, corrections and resubmissions
Follow-up through approval, inspection and PTO
Customer list, exports, API and webhooks

Get started

Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.