Quick Answer
San Diego is one of America's best solar markets: 266 sunny days, 5.7 peak sun hours (NREL data), and SDG&E rates of $0.35-0.45/kWh—the highest in mainland US. NEM 3.0 reduced export credits, so pair solar with battery storage to maximize savings. Expect $2.80-3.50/watt and 5-8 year paybacks. If you're paying SDG&E $300-400/month, you're leaving money on the table every month you wait.
Solar in San Diego
San Diego combines exceptional sunshine with some of the highest electricity rates in the nation. According to NREL data, San Diego averages 266 sunny days and 5.7 peak sun hours daily. While NEM 3.0 has reduced export credits, high SDG&E rates still make solar financially attractive—particularly with battery storage.
From my experience:San Diego has the highest electricity rates in the mainland US—I've seen bills hitting $0.50+/kWh in summer tiers. NEM 3.0 changed the game, but here's what people miss: those insane rates mean even with reduced export credits, solar still crushes your bill. Add a battery and you're avoiding peak rates that would make New Yorkers cry. If you're in SD and paying $300-400/month to SDG&E, you're literally leaving money on the table every month you wait.
San Diego Solar Stats
San Diego averages 266 sunny days and 5.7 peak sun hours daily. SDG&E rates average $0.35-0.45/kWh—among the highest in the nation. Solar can cut bills by 70-90% even under NEM 3.0. (Source: NREL Solar Resource Data)
[Editor's Note, Jan 2026]:Local utility rates, incentive programs, and installer availability verified for current accuracy.
Why San Diego is Great for Solar
- Excellent sunshine: 266 sunny days, 5.7 peak sun hours
- Sky-high rates: SDG&E charges $0.35-0.45+/kWh
- High bills: Average SD electric bills $200-400+/month
- Property tax exemption: Solar excluded from property tax
- Mild climate: Ideal conditions for panel longevity
San Diego Solar Costs
Average System Costs
| System Size | Gross Cost | With Battery |
|---|---|---|
| 6 kW | $16,800-21,000 | $28,000-35,000 |
| 8 kW | $22,400-28,000 | $33,000-42,000 |
| 10 kW | $28,000-35,000 | $40,000-50,000 |
Federal 25D credit ended Dec 31, 2025. PPA/Lease options still benefit from 30% through 2027.
Cost Per Watt
- SD average: $2.80-3.50 per watt (solar only)
- With battery: Add $10,000-15,000 for storage
- Premium installs: $3.50-4.50 per watt
SDG&E and NEM 3.0
SDG&E customers are under California's NEM 3.0 policy, which significantly changed solar economics in April 2023. Understanding NEM 3.0 is critical for San Diego solar decisions.
NEM 3.0 Key Points
- Reduced export rates: Credits ~75% lower than retail rate
- Time-of-use required: Peak rates 4-9 PM
- Self-consumption valued: Use your own power, save full rate
- Battery advantage: Store solar, use during peak = maximum savings
NEM 3.0 Strategy
Under NEM 3.0, the goal is to maximize self-consumption rather than exports. Battery storage lets you store daytime solar and use it during expensive 4-9 PM peak hours—saving the full $0.50+/kWh rate. (Source: utility tariff filings and DSIRE Database)
With vs Without Battery
| Scenario | Bill Reduction | Payback |
|---|---|---|
| Solar only (NEM 3.0) | 40-60% | 8-12 years |
| Solar + battery | 70-90% | 7-10 years |
| High self-consumption | 80-95% | 6-9 years |
California Incentives
Available Incentives
- Property tax exemption: 100% of solar value excluded
- No sales tax: On solar equipment
- SGIP battery rebate: $150-1,000/kWh for storage
- Low-income programs: DAC-SASH, SOMAH available
Federal Options
- Purchased systems: No federal credit (25D ended 2025)
- PPA/Lease: Still benefits from 30% credit through 2027
- Note: Many San Diegans choose PPA to avoid upfront costs
SD Considerations
Climate Advantages
- Ideal temperatures: Mild weather means optimal panel efficiency
- Low humidity: Less cleaning needed
- Marine layer: Morning clouds in coastal areas, clears by noon
- Consistent production: Little seasonal variation
San Diego-Specific Factors
- Coastal vs inland: Inland areas get more sun
- Spanish tile roofs: Common; slightly higher install cost
- HOAs: California law protects solar rights
- Fire zones: Inland areas may have fire considerations
Production Estimates
- Annual production: 1,600-1,800 kWh per kW installed
- 8 kW system: ~12,800-14,400 kWh/year
- Coastal: Slightly lower due to marine layer
- Inland: Maximum production
Battery ROI
In San Diego, battery storage often pays for itself in 5-7 years due to high peak rates ($0.50+/kWh). A 13 kWh battery storing $5-8/day of peak power savings adds up quickly. (Source: EnergySage market analysis)
The Bottom Line
San Diego remains excellent for solar despite NEM 3.0. Sky-high SDG&E rates mean even reduced export credits still deliver significant savings—and battery storage maximizes value by shifting usage to avoid peak rates.
Key points:
- SDG&E's high rates ($0.35-0.50+/kWh) make solar compelling
- NEM 3.0 means batteries are highly recommended
- Focus on self-consumption, not maximum exports
- Expect 7-10 year payback with solar + battery
- PPA/Lease options avoid upfront costs while still saving money
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