An electric vehicle may contribute to backup power at a Del Mar home, but an ordinary charging setup does not establish that capability. Before counting your EV battery in a solar-plus-storage proposal, verify the vehicle, bidirectional equipment and complete home-backup design together.
Del Mar is a Clean Energy Alliance member city. CEA supplies generation service for enrolled customers; SDG&E continues delivery, billing and outage response. Confirm your actual enrollment on your bill. Neither generation-service enrollment nor ownership of an EV establishes equipment compatibility. Sources were checked October 12, 2026.
Charging the car and powering the house are different functions
SDG&E's vehicle-grid integration guidance distinguishes managed charging, which controls when a vehicle charges, from vehicle-to-home operation, which needs a bidirectional charger capable of sending energy back to the building. It separately describes vehicle-to-grid operation, where energy flows to the utility grid.
The practical implication: a charger that schedules inexpensive charging is not automatically a home backup supply. Likewise, a vehicle-to-home design does not establish permission to export electricity for compensation. Have the installer confirm the applicable SDG&E requirements for the exact configuration.
SDG&E's page also discusses pilots and technology demonstrations. Those descriptions are not evidence that every Del Mar household can enroll or that every EV supports home backup.
Request a compatibility list before comparing battery sizes
Ask the design team to document:
- The vehicle model, model year and supported home-power function.
- Required charger, power-conversion equipment, controls and software.
- Equipment that safely separates the home from the utility during an outage.
- Supported circuits and continuous and starting-power limits.
- Whether the proposed stationary battery and rooftop solar can operate with the vehicle system, and in which modes.
Do not simply add the vehicle's advertised battery capacity to a home battery's capacity. The available energy, permitted discharge range and equipment output limits need to be established for the installed system. Have qualified professionals design and install the connection; do not improvise a connection through household outlets.
Plan for the hours when the car is away
Consider a hypothetical household whose only compatible EV is at work when an afternoon outage begins. Energy in that vehicle is unavailable to the house until the vehicle returns and is connected in the required way.
Compare two operating scenarios in the proposal: essential loads supported without the vehicle, and the additional capability available with it connected. Also identify the driving reserve you want to retain. A larger vehicle battery is not a substitute for answering these practical availability questions.
For stationary storage, PG&E's general battery guidance explains that charge, connected demand and solar availability affect backup duration. Solar recharge requires suitable sunlight and compatible backup equipment. Neither setup guarantees uninterrupted power through every outage.
Clarify what a solar PPA includes
A qualifying no-upfront solar-plus-battery PPA can provide useful fixed home equipment while preserving cash. The CPUC consumer guide explains that the solar provider owns the system and sells its electricity through ongoing payments.
Ask whether EV backup equipment is included, separately priced or outside the proposal. Review battery ownership, energy rate, possible escalator, term, maintenance, replacement and home-sale terms alongside remaining utility charges. Availability depends on the offer and property; savings are not guaranteed.
Our battery storage and power guide explains why energy capacity and output limits need separate review. Bring your vehicle details, bill and essential-load list to West Coast Alternatives' homeowner journey to discuss a home-backup plan with clear equipment boundaries.