Solar & Battery Installation San Diego Local Installers & Quotes
Design solar and battery systems for San Diego using Photonik's professional design platform. San Diego's near-perfect climate delivers some of the best solar generation in the US. With California's supportive solar policies, SGIP battery incentives, and high electricity rates from SDG&E, San Diego consistently ranks as one of America's top cities for residential solar.
Solar Design San Diego
Energy Usage
How much energy your San Diego home uses daily directly impacts the solar system size you'll need. The average household uses around 39 kWh per day, whilst energy efficient properties may use only half that.
Lowering energy usage before solar installation — via improved insulation and efficient appliances — often reduces required system size and enhances financial returns.
Typical energy usage per person per day in San Diego:
Note: Actual usage varies depending on property size, building efficiency, climate, and appliances.
Solar System Sizing
Matching your daily energy needs requires approximately 10.3kW of solar capacity. In San Diego, sizing between 15.4kW and 20.5kW gives a good balance between covering your usage and getting the best return on investment.
A 15.4 kW solar array in San Diego delivers approximately 66.8 kWh daily, with generation varying seasonally from 3.50 kWh/kW/day in December up to 4.83 kWh/kW/day in April.
Solar & Energy Savings
Calculate Heat Pump & EV Savings
Electrify your home by replacing gas heating, petrol vehicles, and other fossil fuel appliances with electric alternatives powered by clean solar energy. This delivers significant additional financial savings and substantial carbon emission reductions. Our calculator helps you compare costs and model the financial impact of switching to electric appliances and vehicles.
How Solar Reduces Your Electricity Bills
The calculations below show how your electricity bills change with solar. Your Old Bill of - per month (- annually) is calculated from your total energy consumption multiplied by the grid electricity rate. Your New Bill of - per month (- annually) accounts for solar generation, the percentage you use directly (self-consumption), remaining grid consumption, and feed-in credits for excess energy exported to the grid. This results in monthly savings of - (- annually).
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Battery Storage San Diego
Solar Battery Sizing
Without battery storage, a 15.4 kW system in San Diego achieves approximately 50% energy self-sufficiency, with the remaining 50% supplied by the grid. Beyond the bill savings, a 10 kWh battery at 73% self-sufficiency also provides backup power during outages — an increasingly valued feature for homeowners.
Battery economics depend on your specific tariff structure and usage patterns — the Photonik design tool can model these scenarios with your actual electricity plan.
Energy Self Sufficiency Calculator*
*Note: This calculator provides simplified battery self-sufficiency estimates. For accurate per-hour simulations that account for solar generation patterns, consumption timing, battery charging/discharging cycles, and efficiency losses across all seasons, use the full Photonik design tool.
Panel Placement Tool San Diego
This is a simple panel placement tool that lets you quickly estimate panel count for a single roof area. Try Photonik for advanced features:
- Multiple panel groups
- Custom roof angles
- Panel orientation
- Shade loss calculations
- Panel selection (1000+ models)
- Full integration with our design tool
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Solar & Battery System Cost San Diego
Understanding Solar & Battery System Costs
Solar prices in San Diego have come down significantly in recent years — a 15.4 kW system now costs around $21,696, making the economics more attractive than ever. Solar systems typically achieve payback in around 8.9 years, whilst adding battery storage extends the payback period but provides greater energy independence.
The cost breakdown shows estimates for equipment costs, installation labour, and applicable taxes. Adjust system size and battery storage to see how it affects total investment and payback periods.
ITC Rebates San Diego
The federal Investment Tax Credit (ITC) for residential solar ended on December 31, 2025. To have qualified, the system had to be installed and operational by that date. Large-scale and commercial solar credits follow different rules.
Many states and local utilities still offer rebates and incentives. These can include state tax credits, cash rebates, performance-based incentives, and net metering programs that allow you to sell excess solar energy back to the grid. Check your state energy office and utility for current programs.
Use our full design tool for detailed system design, panel placement, and professional proposals.