Southern California is one of the best places in the country for solar power. The Inland Empire receives an average of 280 sunny days per year, and electricity rates from SCE (Southern California Edison) continue to climb. For homeowners in Murrieta, Temecula, and throughout Riverside County, solar power is no longer just an environmental choice -- it is a financial one. But the solar landscape has changed significantly with California's NEM 3.0 policy, making it essential to understand how solar, battery storage, and your home's electrical system work together.
Understanding NEM 3.0 (Net Billing Tariff)
California's Net Energy Metering 3.0 policy, which took effect in April 2023, fundamentally changed the economics of residential solar. Under the previous NEM 2.0, homeowners received near-retail credit for excess solar energy sent back to the grid. Under NEM 3.0, those export credits have been reduced by approximately 75%.
What this means in practice:
- Under NEM 2.0: You sent 1 kWh to the grid and received roughly $0.30 in credit. Solar alone was a great investment.
- Under NEM 3.0: You send 1 kWh to the grid and receive roughly $0.05-$0.08 in credit. The value is in using your solar energy yourself or storing it in a battery for later use.
The key takeaway: under NEM 3.0, solar still makes excellent financial sense, but pairing it with battery storage is now essential to maximize your return on investment. Without a battery, excess daytime solar production is exported at low rates, and you buy electricity back at high rates in the evening.
Battery Storage: The Game Changer
Home battery systems like the Tesla Powerwall, Enphase IQ Battery, and Franklin WH store your excess solar energy during the day and release it in the evening when electricity rates are highest and solar panels are not producing. This is called "self-consumption optimization."
Battery storage benefits under NEM 3.0:
- Time-of-use arbitrage: SCE's time-of-use rates charge $0.40-$0.60/kWh during peak evening hours (4-9 PM). By storing solar energy during the day and using it during peak hours, you avoid the most expensive electricity.
- Backup power: During grid outages, your battery provides emergency power. With enough battery capacity, you can power your home through an entire night or longer.
- Self-sufficiency: A properly sized solar+battery system can cover 80-95% of your electricity needs, dramatically reducing your utility bills.
- Grid independence: Some homeowners are combining solar, batteries, and a backup generator for complete energy independence.
Solar System Costs in Southern California (2026)
Solar panel costs have decreased significantly over the past decade, but the addition of battery storage increases the total system cost. Here are current price ranges for the Inland Empire:
- Solar panels only (6-8 kW system): $15,000-$22,000 before incentives
- Solar + single battery (6-8 kW + 13.5 kWh battery): $25,000-$35,000 before incentives
- Solar + dual battery (8-10 kW + 27 kWh storage): $35,000-$48,000 before incentives
After incentives, the numbers look much better:
- Federal ITC (Investment Tax Credit): 30% of total system cost, including batteries. On a $30,000 system, that is a $9,000 tax credit.
- SGIP (Self-Generation Incentive Program): California offers $150-$1,000/kWh in rebates for battery storage, depending on your income level and location. Equity resiliency budgets offer even higher incentives for qualifying households.
Electrical Requirements for Solar Integration
Installing solar panels is not just a roofing project -- it is fundamentally an electrical project. Your home's electrical system must support the solar installation safely and efficiently. Here is what is involved:
Panel Capacity Assessment
Your electrical panel must have sufficient capacity and available breaker space for the solar interconnection. Most residential solar systems connect through a dedicated breaker in your main panel. If your panel is already full or is rated at only 100 amps, a panel upgrade to 200 amps is typically required before solar can be installed.
The NEC (National Electrical Code) 120% rule limits the total breaker amperage that can feed a panel. For a 200-amp panel with a 200-amp main breaker, the maximum solar backfeed breaker is 40 amps (200 x 1.2 = 240; 240 - 200 = 40 amps). If your solar system requires a larger breaker, your electrician may need to install a line-side tap, a solar-ready panel, or derate your main breaker.
Inverter and Wiring
Solar panels produce DC (direct current) power that must be converted to AC (alternating current) for your home. Two main inverter types are used:
- String inverters: One central inverter converts DC from all panels. Less expensive but all panels perform at the level of the weakest panel. Best for roofs with no shading.
- Microinverters (Enphase): Each panel has its own small inverter. Higher cost but each panel operates independently, better for roofs with partial shade or multiple orientations.
The wiring between your roof-mounted panels and the electrical panel or inverter must be properly sized, protected in conduit, and routed according to fire setback requirements specified by your local fire department and the California Fire Code.
ROI: How Long Until Solar Pays for Itself?
The return on investment for solar in Southern California depends on several factors, but the numbers are favorable:
- Average SCE electricity cost: $0.35-$0.50/kWh (among the highest in the nation)
- Average solar production in Riverside County: 1,700-1,800 kWh per kW installed per year
- Typical 7 kW system production: 11,900-12,600 kWh per year
- Annual electricity savings: $4,200-$6,300 (depending on usage and rate plan)
- Payback period (solar only): 5-7 years
- Payback period (solar + battery): 7-10 years
- System lifespan: 25-30 years (panels), 10-15 years (batteries)
After the payback period, every dollar of electricity your solar system produces is essentially free. Over a 25-year system life, a well-designed solar installation in Southern California can save $100,000-$150,000 in electricity costs.
Combining Solar with an EV Charger
One of the most powerful financial combinations for Inland Empire homeowners is solar power plus an EV charger. Instead of paying $0.35-$0.50/kWh from SCE to charge your car (which costs $1,100-$1,600/year for 12,000 miles), you charge from your own solar panels for effectively $0/kWh. A smart EV charger like the Emporia or JuiceBox can be programmed to charge only when your solar panels are producing excess power.
For a household that drives an EV and has solar+battery, the combined savings from eliminating both the electricity bill and gasoline expenses can exceed $5,000-$8,000 per year.
Getting Started with Solar
The first step is a professional assessment of your electrical system, roof condition, and energy usage patterns. Power Man Electric provides solar power electrical services including panel upgrades for solar readiness, solar system electrical interconnection, battery storage installation, and EV charger integration. We work with all major solar panel and battery manufacturers.
Whether you are in Murrieta, Temecula, Menifee, Hemet, or anywhere in Southwest Riverside County, call (951) 704-5067 to schedule a free solar readiness assessment and learn how solar can work for your home.