SMUD Solar Bills, SSR, Legacy NEM and Batteries
Understand SMUD Solar and Storage Rate credits, remaining bill charges, legacy NEM distinctions, and the questions to ask before adding storage or expanding solar.
Sources reviewed: 2026-10-06
Key takeaways
- SMUD sets its own rates. PG&E and SCE export rules are not a substitute for a SMUD account's terms.
- SSR is an additional component alongside the residential Time-of-Day rate, not an automatic retail-valued export offset.
- Export credits and monthly infrastructure, program, surcharge and tax items require separate treatment.
- Legacy status, system changes and storage-incentive choices can alter the answer. Obtain confirmation before changing equipment.
Confirm SMUD service rather than using a statewide rule
SMUD is a community-owned utility whose board sets policy and rates. Its official SSR page says California Public Utilities Commission rate decisions do not govern SMUD's rates. A Northern California home should not be assigned PG&E's Solar Billing Plan simply because another nearby home uses that utility.
Verify the service account, existing solar arrangement and approved system with SMUD. The official Solar and Storage Rate page is the source for this guide's SSR distinctions. Location alone does not establish program eligibility or the retail schedule on the bill.
Distinguish Solar and Storage Rate from legacy NEM
SMUD describes SSR for solar or solar-and-storage customers approved to install on or after March 1, 2022. The residential Time-of-Day, 5 to 8 p.m., rate remains the underlying electricity rate; SSR adds solar/storage compensation and program treatment rather than replacing all import prices.
The reviewed page says qualifying legacy NEM customers approved before March 1, 2022 can remain on that arrangement through December 31, 2030, subject to described exceptions involving incentives, system changes or moving. These are account-specific conditions, not a promise that every older system retains NEM after any modification. Source: SMUD SSR and legacy distinctions.
Follow generation, direct use, storage and exports
Solar generation can serve the home directly, charge compatible storage, or pass to the grid. Grid imports still supply the home when generation and available storage do not cover demand. The inverter's total production is not automatically an export quantity, and a battery's charging energy should not be counted simultaneously as an export.
For an original simple example without storage, 800 generated kWh minus 500 directly used kWh leaves 300 exported kWh. If 400 kWh is purchased from the grid at other times, those purchases are priced under the assigned import schedule; subtracting 300 from 400 does not by itself calculate the dollar bill. See SMUD's export and rate explanation.
Apply the dated SSR export rate to eligible exports only
The reviewed SMUD page lists excess-electricity compensation of 9.6 cents per kWh effective June 1, 2026 for SSR. This is a dated published rate, not a guaranteed permanent value and not a claim about the legacy NEM arrangement.
Using that figure only for the hypothetical SSR example above, 300 eligible exported kWh multiplied by $0.096 gives $28.80 of export credit before actual utility billing treatment. It is not total savings, the final bill or a battery-payback estimate. Confirm the current schedule and account eligibility with the official SSR source before using the number in a proposal.
Why monthly charges can remain
SMUD says SSR export credits offset electricity usage charges and remaining credits carry to later bills. Its homeowner FAQ separately identifies the System Infrastructure Fixed charge, enrolled-program fees, surcharges and taxes as charges payable monthly. A large export quantity therefore does not prove the whole statement is paid.
Read the bill by separating import usage charges, applied export credits, carried balances and the remaining monthly items. The SMUD homeowner billing FAQ and the SSR credit explanation support that distinction. This guide does not assign a universal infrastructure-charge dollar amount.
Why SSR exports do not automatically eliminate a SMUD bill
- Import usage charges: Grid purchases follow the customer's underlying Time-of-Day schedule.
- SSR export credits: Eligible exported energy earns the current SSR credit and can carry under the program.
- Other monthly items: The homeowner FAQ identifies infrastructure charges, enrolled-program fees, surcharges and taxes separately.
Diagram sources: www.smud.org, www.smud.org
Adding a battery can involve a status and incentive choice
SMUD's reviewed SSR page says a legacy NEM customer may add a battery and remain on NEM, but that arrangement is not eligible for My Energy Optimizer Partner+ incentives. The page describes SSR participation as relevant to that incentive choice. Equipment eligibility, program funding and current terms still need direct confirmation.
Do not infer that every battery forces an SSR switch or that every battery automatically qualifies for an incentive. Ask SMUD how the proposed storage, program enrollment and any concurrent array change affect this specific installation. Source: SMUD's battery and legacy FAQ. Backup capability and financial payback remain separate questions.
Check the SMUD arrangement before changing equipment
- Identify the existing approval and rate: Confirm legacy NEM or SSR using SMUD's account and interconnection records.
- Describe the exact proposed change: Distinguish storage-only addition, array expansion, replacement or a home move.
- Check incentive participation: Ask whether the selected program requires SSR and whether this equipment is eligible.
- Obtain written confirmation: Resolve rate status and application requirements before relying on a proposal.
Diagram sources: www.smud.org
Expansion, replacement and moving require their own checks
The SSR FAQ addresses system changes and home moves separately. Existing approved capacity, the nature and size of the modification, and the account's history can change the treatment. An installer's panel-count description is not sufficient evidence that the existing solar agreement remains unchanged.
Before accepting a retrofit or buying a solar home, request the current agreement, approved capacity, interconnection history and a written explanation of the change's effect. Use the SMUD SSR change-of-system guidance, rather than general California NEM claims, for the account review.
Interconnection and a savings proposal are separate approvals
SMUD's homeowner page describes the application through PowerClerk, system information, drawings, permitting and inspections, meter work and permission to operate. Ask the installer which tasks it owns and retain the utility's approval. Completed construction is not proof that export billing or safe parallel operation has been approved.
A reliable economic proposal also needs the assigned import rate, timed grid exchanges, remaining charges, any confirmed incentives and storage assumptions. See the SMUD homeowner process. Our annual energy-flow calculator illustrates kWh, not an actual SMUD bill or a battery dispatch model.
SMUD status and change checklist, reviewed October 6, 2026
| Situation | Relevant distinction | What to verify |
|---|---|---|
| Newer approved installation | SSR versus the underlying retail schedule | Actual approval and account arrangement |
| Eligible legacy installation | NEM may continue subject to exceptions | Written status and applicable legacy period |
| Battery added without changing the array | NEM retention and incentive eligibility are separate | Storage application and selected program terms |
| Array expanded or replaced | System-change rules may alter treatment | Existing approved capacity and exact modification |
| Home sold or account moved | A move is not the same as equipment-only work | Agreement and new-account treatment |
Original SSR example, not a complete bill
| Quantity | Illustrative value | Meaning |
|---|---|---|
| Generation | 800 kWh | Invented monthly output |
| Direct self-use | 500 kWh | Not an export |
| Export | 300 kWh | Generation less direct use, with no battery assumed |
| Export-credit arithmetic | 300 times $0.096 = $28.80 | Uses the reviewed June 1, 2026 SSR rate, only if applicable |
| Grid imports | 400 kWh | Still require the actual timed import tariff |
| Remaining monthly items | Not calculated | Infrastructure and other applicable charges must be checked |
Frequently asked questions
Does California's investor-owned-utility billing plan determine SMUD rates?
No. SMUD states that its board sets its rates and that CPUC rate decisions do not govern them. Use the actual SMUD schedule and agreement.
Is SSR the same as the residential Time-of-Day rate?
No. SMUD describes SSR as an additional component. The underlying residential Time-of-Day rate remains relevant to grid purchases.
Is the 9.6-cent export rate permanent?
No permanent rate is promised. It is the figure on the reviewed SSR page effective June 1, 2026. Recheck the current published schedule for the account and billing period.
Will a surplus export credit offset all charges?
Do not assume that. SMUD distinguishes usage-credit treatment from infrastructure charges, enrolled-program fees, surcharges and taxes payable monthly.
Does adding a battery always force a legacy NEM customer onto SSR?
The reviewed FAQ says a NEM customer may add storage and remain on NEM, while certain storage-incentive choices have different SSR eligibility. Concurrent system changes also need review.
Can this guide tell me whether a battery pays for itself?
No. It explains status and billing distinctions. Payback requires installed cost, interval usage, current tariffs, dispatch, losses and verified incentive assumptions.