Before using an SDG&E bill to evaluate a solar-plus-battery PPA, check whether its electricity usage is marked “Estimated.” An issued utility bill can still contain estimated consumption, so a proposal should identify that uncertainty rather than treat every monthly figure as a confirmed measurement.
A qualifying no-upfront PPA can help eligible homeowners access professionally installed solar and storage. A clear usage baseline makes the expected payment and utility-bill comparison more useful.
Find the estimate label first
SDG&E’s bill guide, checked November 12, 2026, says estimated bills use historical and/or recent usage when actual information is unavailable, including because of meter communication or access problems. It places the estimate label beside usage in the Detail of Current Charges section, generally on page two or three.
The utility says estimated bills still need to be paid. When actual usage arrives, a corrected bill can apply a credit or an additional amount owed. Contact SDG&E about account-specific questions rather than assuming a high or low estimate is permanent.
For a proposal review, flag the affected service dates and preserve both the original and any corrected bill. The goal is to give the designer an accurate record of what is known.
Ask how the proposal handles uncertain months
Our suggested request is: “Please identify any estimated utility usage in the baseline and explain whether the savings model needs updating when corrected data becomes available.”
Ask the proposal writer to document:
- Which service periods contain estimated electricity use.
- Whether corrected usage is already available.
- How missing or uncertain intervals are represented in the model.
- Whether a later correction changes proposed sizing, expected imports or projected savings.
For example, suppose a hypothetical bill reports 600 kWh and a corrected record later shows 500 kWh for the same period. The difference is 100 kWh. It is not automatically 100 kWh of solar savings: timing, solar production, battery operation and the account’s tariff still matter. Ask for the affected forecast to be recalculated instead of multiplying the difference by an assumed retail price.
Our usage-time alignment guide explains why matching electricity use to the right hours matters alongside accurate totals.
Separate utility estimates from solar monitoring
This question concerns SDG&E’s consumption record. A solar app’s estimated production is a different data source, covered in our production-estimate guide. Keep the two labeled in the proposal folder.
SDG&E also explains that community-choice customers receive a combined bill containing utility and generation-provider charges. Confirm your own generation provider and tariff so the comparison includes the applicable remaining charges. Do not assume a corrected usage figure changes the PPA’s agreed price or payment formula.
Keep the equipment and payment commitments clear
The CPUC solar guide explains that a PPA provider owns the solar system and sells its electricity. Verify qualification for no upfront payment and review the rate, escalator, term, battery fees, maintenance, replacement and home-transfer provisions. Include remaining utility charges. No upfront purchase does not mean free electricity or guaranteed savings.
A revised bill forecast is also separate from an outage-runtime assessment. General battery guidance explains that supported circuits, available charge and household demand affect backup. Confirm the proposed system’s output and usable-energy limits. Ordinary grid-tied solar alone generally does not supply outage power; compatible backup equipment and suitable sunlight are needed for solar recharge during an interruption.
Bring your usage records, any corrections and the written proposal to the West Coast Alternatives homeowner journey for a comparison grounded in your SDG&E account.