Riverside Public Utilities Overview
Riverside Public Utilities is California's largest municipal utility by customer count, serving over 110,000 electric customers in the City of Riverside. As one of the oldest publicly-owned utilities in the West, RPU has a track record of stable rates and customer-focused policies.
Inland Empire Solar Advantage
Riverside's location in the Inland Empire provides outstanding solar conditions:
- Peak sun hours: 5.6 hours/day average
- Clear skies: Less marine layer than coastal areas
- Hot summers: High AC usage = high solar value
- Space: Larger homes often mean bigger roof areas
Coastal vs. Inland Empire
While Inland Empire summers are hotter (meaning higher AC bills), the clear skies and excellent solar resource mean your panels produce more electricity. The combination of higher usage and higher production typically works in solar's favor.
Net Metering Policy
As a municipal utility, Riverside Public Utilities sets its own net metering policy independent of the CPUC and NEM 3.0:
| Feature | RPU Policy |
|---|---|
| Credit Rate | Competitive retail-based compensation |
| System Size Limit | Size to 100% of usage |
| Monthly Rollover | Credits carry forward |
| Grid Access Fee | Modest compared to NEM 3.0 |
| Interconnection | RPU approval process |
Municipal Advantage Over NEM 3.0
| Factor | RPU | SCE (NEM 3.0) |
|---|---|---|
| Export Value | Fair compensation | Severely reduced |
| Grid Charges | Reasonable | Significant |
| Typical Payback | 9-12 years | 15+ years |
| Battery Requirement | Optional | Often needed |
Rates & Economics
The combination of excellent solar resource and municipal utility benefits creates compelling solar economics:
| System | Gross Cost | Annual Savings | Payback |
|---|---|---|---|
| 5 kW | $14,000-16,500 | $1,350-1,650/yr | 9-11 years |
| 7 kW | $19,500-23,000 | $1,900-2,300/yr | 9-11 years |
| 10 kW | $28,000-33,000 | $2,700-3,300/yr | 9-11 years |
Federal Tax Credit (2026)
The residential federal tax credit (25D) for cash or loan purchases expired at the end of 2025. However, PPA/Lease options still benefit from the 30% credit through 2027 - the solar company claims it and passes savings to you.
| Purchase Type | Federal Credit | Notes |
|---|---|---|
| Cash/Loan | None (25D expired) | No homeowner credit available |
| PPA/Lease | 30% (through 2027) | Company claims, you benefit from lower rates |
California State Benefits
- Property tax exemption: Solar excluded from property tax increases
- SGIP (batteries): Self-Generation Incentive Program for storage
- Higher production: 5.6 sun hours means more kWh per dollar invested
Inland Empire Installation Notes
The Riverside market is competitive with many installers serving the Inland Empire. Get multiple quotes, and consider that local installers may offer better service and warranty support than distant companies.
The Bottom Line
Riverside is one of the best solar markets in California. The combination of 5.6 peak sun hours, municipal utility policies (avoiding NEM 3.0), and competitive installation prices creates 9-12 year payback periods that rival what California offered before NEM 3.0.
If you're an RPU customer wondering whether solar still makes sense in California, the answer is absolutely yes. You're not subject to the same policies that have slowed adoption in SCE, PG&E, and SDG&E territories.
Batteries add value for backup power and can improve economics further, but unlike NEM 3.0 territories, they're not essential for good solar returns in Riverside.
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