Battery Storage & the SGIP Rebate: Is It Worth It?
With peak electric rates over 45¢/kWh and NEM 3.0 reducing what you earn for exported solar, storing your own power is now worth far more than selling it back. Here's how battery storage and the SGIP rebate actually work.
Adding a battery to an existing solar system used to be a nice-to-have for backup power during outages. Today, with SDG&E rates near record highs and NEM 3.0 cutting export credits by roughly 75%, it's increasingly a straightforward financial decision: use the power you already generate instead of selling it cheap and buying it back expensive.
Why batteries make more sense now
Under the old NEM 2.0 rules, exporting surplus solar power to the grid during the day and drawing it back at night was credited close to retail value — batteries were mostly about resilience, not savings. Under NEM 3.0, that export credit is worth a fraction of what it was. A battery lets you capture your own daytime solar production and use it during expensive evening peak hours instead, when utility rates are highest.
A Tesla Powerwall 3, for example, can typically be retrofitted onto an existing array — including systems with a failing or partially dead inverter, where the Powerwall's own integrated solar inverter can take over for the failed strings rather than requiring a separate replacement inverter purchase.
What is the SGIP rebate?
The Self-Generation Incentive Program (SGIP) is a California Public Utilities Commission program that provides rebates toward the cost of battery storage, administered through the state's major utilities and community choice programs. Solar Review is an approved installer for San Diego Community Power (SDCP) battery storage rebates under SGIP.
Rebate amounts and eligibility depend on several factors — your utility territory, household income tier, and how much program budget (including equity-focused budget tiers) is currently available. Because these figures change as program budgets are allocated, the most reliable way to know your actual number is to ask during a free evaluation rather than rely on a generic estimate.
See if your home qualifies for a battery rebate
We'll walk through your eligibility, current SGIP figures, and whether a battery makes sense for your system — free, no obligation.
Book a Free Evaluation →Do I need to replace my solar system to add a battery?
Usually not. In most cases a battery is added alongside your existing panels and inverter setup, provided your site and electrical panel can accommodate it. This is also true for systems from installers who are no longer in business — see our guide on what to do when your solar installer closes if that applies to you.
Frequently asked questions
What is the SGIP rebate?
A California program providing rebates toward battery storage costs, administered through utilities and programs like SDCP. Solar Review is an approved SDCP battery installer.
Do I qualify for a battery rebate?
It depends on your utility territory, income tier, and available program budget — ask during a free evaluation for your current eligibility and figures.
Can I add a battery to my existing solar system?
In most cases, yes — a battery is typically retrofitted onto an existing array without replacing the panels.
Find out if a battery makes sense for your home
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