For a PG&E homeowner comparing a solar-plus-battery PPA, a useful savings estimate follows the electricity through the full billing year. Monthly export credits matter, but an annual surplus can change how part of that exported energy is valued at true-up.
Understanding the adjustment helps you compare a system designed around your household's use, battery operation and ongoing PPA payments. This guide covers residential Solar Billing Plan accounts using official sources checked September 28, 2026.
Confirm which solar billing arrangement you have
PG&E's Solar Billing Plan page explains that residential customers receive monthly statements and an annual true-up. Check the plan name and true-up period on your actual statement before applying this explanation. An older Net Energy Metering account should be reviewed under its own rules.
Also identify your generation provider. If a community-choice provider supplies generation, request its surplus-energy policy alongside PG&E's delivery-billing information. A proposal should use your actual account arrangement rather than assuming every home in PG&E territory receives identical credits.
Why can a surplus create a credit adjustment?
Page 6 of PG&E's residential Solar Billing Plan guide explains what happens when annual electricity sent to the grid exceeds electricity taken from it. Monthly export credits attributed to that excess are corrected through a True-Up Credit Adjustment for Energy Produced and Energy Delivered. Net Surplus Compensation may instead apply at a different value.
PG&E warns that the replacement value can be lower, potentially leaving money owed. It also directs community-choice customers to check their provider's treatment. This concerns annual surplus; an afternoon of exporting electricity does not by itself establish the year's outcome.
Ask the proposal preparer to show whether this adjustment is included and to identify the assumed annual imports and exports. A large displayed credit should not automatically be described as spendable cash.
Keep the example separate from the rate forecast
For arithmetic only, imagine an adjustment removes $90 of earlier credits and a separate surplus credit adds $25. The net effect of those two entries is a $65 charge. These invented dollar amounts are not PG&E rates, a prediction or a complete bill calculation.
The practical lesson is to compare the final annual result rather than adding every preliminary credit to your projected savings. Request the supporting bill calculation if an estimate assumes a substantial annual surplus.
Our PG&E non-bypassable-charge guide covers another reason the remaining utility bill needs its own calculation.
Model battery use around the household
A battery can help shift stored solar energy to times when the home would otherwise buy grid electricity. Ask for a comparison using your actual usage pattern, planned appliance changes and a stated backup reserve. Include charging losses and the equipment's operating limits.
Do not assume the best plan is always to maximize exports or always to eliminate them. Request a household-specific annual comparison showing the value of onsite use, exports and remaining imports under the applicable schedules.
PG&E's battery guidance explains that backup duration depends on storage size, demand and solar availability. A billing strategy also needs to leave an appropriate outage plan: supported circuits, available charge and usable sunlight for compatible solar recharging. No setting guarantees power through every outage.
Compare the complete PPA cost
A qualifying no-upfront solar-plus-battery PPA can make equipment accessible while preserving cash. The CPUC solar guide explains that the provider owns the solar system and sells its generated electricity. A utility credit adjustment does not itself rewrite that private payment agreement.
Review the starting rate, any escalator, term, qualification, battery ownership, installation charges, maintenance, replacement and home-sale terms. Include ongoing PPA payments and the final modeled utility cost. No upfront purchase does not mean free electricity or guaranteed savings.
Bring your PG&E statement and proposed annual calculation to the West Coast Alternatives homeowner journey. Clear surplus assumptions make the benefits of a suitable solar-and-battery plan easier to assess.