A solar power purchase agreement can help an eligible SDG&E-area homeowner add solar without buying the equipment upfront. When reviewing an offer, ask one additional ownership question: who receives the renewable energy certificates associated with the system?
The California Public Utilities Commission’s solar guide specifically recommends checking a lease or PPA for REC ownership. A clear answer helps match the agreement to your budget, backup needs and environmental goals.
What does a renewable energy certificate represent?
A renewable energy certificate, or REC, represents the environmental attributes associated with renewable electricity generation. It can be transferred separately from the electricity itself.
EPA’s solar power use guidance explains that claims about using renewable electricity depend on ownership of, or exclusive rights to, the associated RECs. Hosting panels on your roof does not by itself establish those rights. The contract between the equipment owner and homeowner matters.
For example, suppose a proposed PPA assigns the system’s RECs to the provider. That clause concerns environmental attributes; the home can still receive electricity from the panels under the agreement. Before describing the home as entirely powered by renewable energy, ask what certificates support that statement and which electricity use they cover. Keep claims specific to the documented arrangement.
How are RECs different from SDG&E export credits?
For homeowners on the SDG&E Solar Billing Plan, the monthly utility bill charges for grid imports and credits eligible exports. Export values depend on when electricity reaches the grid. If San Diego Community Power or Clean Energy Alliance supplies your generation, that provider sets generation import and export pricing.
Those utility bill credits and REC ownership answer different questions. A bill showing exported kilowatt-hours does not establish who holds the environmental attributes in your private PPA.
Ask the proposal reviewer to identify three separate items: your solar-provider payment, your projected remaining utility bill, and the agreement’s REC clause. Our SDG&E and community-power billing explanation can help you organize the first two. Do not add assumed REC-sale income to the comparison unless the agreement gives you that right and a documented payment arrangement supports it.
What should the provider put in writing?
Use these questions to make the offer easier to evaluate:
- Who owns the RECs, and where does the agreement assign them?
- If environmental claims are part of the proposal, what documentation supports them?
- Does choosing different REC terms change the quoted price or availability?
- What happens to these rights if the agreement transfers with a home sale or the system is bought out?
A qualifying no-upfront PPA still has ongoing electricity payments. Confirm eligibility, the starting price, any escalator, contract length, equipment ownership, maintenance responsibilities and transfer terms. Confirm whether the battery is included and whether it carries a separate charge; no-upfront equipment does not mean free electricity or guaranteed savings.
Keep battery backup benefits concrete
REC terms do not specify which appliances stay powered during an outage. Review the proposed backed-up circuits, battery capacity, output limits and reserve settings separately. As PG&E’s general battery guidance explains, backup duration depends on stored energy and loads; solar recharging may be limited by night or cloudy conditions. Compatible backup equipment is also necessary.
Bring your SDG&E bill and proposed contract to a West Coast Alternatives consultation. We can help you organize questions about qualifying solar-plus-battery options so the payment plan, supported loads and ownership terms fit the priorities you actually have.