What we review before a San Marino Powerwall proposal.

San Marino battery planning should account for SCE rules, PSPS outage goals, panel capacity, roof and solar timing, equipment placement, larger home loads and the circuits the homeowner wants protected. A useful estimate should explain battery count, backed-up loads, excluded loads, permits, SGIP assumptions and SCE interconnection steps before installation.

1. 1Confirm SCE details: utility account, rate plan, Net Billing assumptions, PSPS history, interconnection steps and current battery program requirements.
2. 2Review electrical capacity: main panel rating, breaker space, meter location, subpanels, Gateway location and any backup load panel needs.
3. 3Choose protected loads: refrigerator, internet, lighting, security, garage access, selected HVAC circuits, EV charging plans and key outlets before sizing the battery.
4. 4Coordinate solar and roof timing: compare San Marino solar installation, roof replacement and the Powerwall backup planning guide before finalizing scope.

The final proposal should separate Powerwall equipment, Gateway or backup panel scope, permit assumptions, SCE steps, SGIP assumptions, financing and excluded loads.

SCE, NEM 3.0, and fire zone outage backup.

• →SCE territory and NEM 3.0. San Marino is in SCE territory. Under NEM 3.0, battery self-consumption is more valuable than exporting solar to the SCE grid. We plan every San Marino Powerwall installation around both outage backup and daily NEM 3.0 optimization. We do not promise any specific financial outcome.
• →San Gabriel foothills PSPS zone. San Marino borders the fire-zone foothill communities of Pasadena and Arcadia. SCE has implemented PSPS shutoffs in this corridor during extreme fire weather. A Powerwall paired with solar provides automatic backup without generator fuel or noise.
• →Whole-home or essential-load backup. We size the battery system to your specific home’s load — whole-home backup keeps all circuits live, essential-load backup protects critical circuits only. Backup runtime depends on approved design, battery capacity, solar production and actual usage.
• →SGIP Equity Resiliency review. San Marino’s proximity to the San Gabriel foothills fire zone and PSPS history may qualify homeowners for the SGIP Equity Resiliency tier. Eligibility requires income qualification, fire threat district designation, PSPS event history, and available program funding. Not assumed. We review during your estimate. We are not a tax advisor.
• →Enphase IQ Battery as an alternative. For homes with Enphase microinverter solar, Enphase IQ Battery 5P is a strong modular alternative. We install and review both during your estimate.

PSPS & wildfire backup guide →  ·  SGIP planning guide →

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