Connecticut has among the highest electricity rates in the U.S. ($0.26–$0.32/kWh). With full retail net metering and SREC incentives, most CT homeowners achieve payback in 6–9 years. Use our calculator with Eversource and UI rates.
Enter your details below. The calculator uses Eversource/UI rates and Connecticut-specific solar data.
Enter your details and click "Calculate" to see your estimated payback period, 25-year savings, and whether SREC participation improves your return.
Connecticut consistently ranks among the 10 most expensive states for electricity in the U.S. With Eversource and United Illuminating (UI) residential rates around $0.26–$0.32/kWh (before taxes and adjustments), a typical Connecticut household paying $180/month can save $90–$140/month with solar—and even more with SREC incentives.
Unlike some neighboring states that have reduced solar compensation, Connecticut maintains full retail net metering for systems up to 25 kW. This means:
Connecticut's SREC (Solar Renewable Energy Certificate) program is one of the state's most valuable solar incentives. Here's how it works:
Important: SREC registration must be done through Connecticut's SREC registry. Not all installers handle this automatically—ask your installer if SREC registration is included.
Monthly bill before solar (2025): $195/month (Eversource Rate R, ~720 kWh/month usage)
System installed (spring 2026): 7.2 kW DC, 20 × 360W panels, microinverters
Installed cost: $19,400 before incentives ($2.69/W)
After 30% federal tax credit: $13,580 net cost
SREC registration: Completed by installer, earning ~$480/year (8 SRECs × $60 average)
Results (first 12 months):
Connecticut has two main electric utilities:
| Utility | Service Area | Avg. Rate (2026) | Solar Interconnection |
|---|---|---|---|
| Eversource | Most of CT (north, west, east) | $0.26–$0.30/kWh | Standard process, 4–8 weeks |
| United Illuminating (UI) | Shoreline & south-central (New Haven, Bridgeport, Stamford) | $0.28–$0.32/kWh | Similar to Eversource |
Both utilities are required by Connecticut law to offer net metering. The main difference is rate level—UI customers typically pay slightly more per kWh, which makes solar savings slightly higher.
Connecticut's solar installation costs are close to the national average:
After the 30% federal tax credit, a typical 7 kW system costs $12,000–$16,000 net.
The average cost of a residential solar system in Connecticut is $15,000-$25,000 before incentives (for a 6-10 kW system). After the 30% federal Investment Tax Credit (ITC), the net cost drops to roughly $10,500-$17,500. Actual costs vary based on roof complexity, panel brand, installer choice, and local permitting fees. Connecticut homeowners should get at least 3 quotes to compare pricing.
All U.S. homeowners qualify for the 30% federal Investment Tax Credit (ITC) through 2032. This credit reduces your federal taxes by 30% of your total system cost. In addition to the federal ITC, some states offer additional rebates, property tax exemptions, or sales tax exemptions on solar equipment. Check with your local utility and the Database of State Incentives for Renewables & Efficiency (DSIRE) for Connecticut-specific programs.
The typical solar payback period in Connecticut ranges from 7 to 12 years, depending on your electricity rate, system size, available incentives, and financing terms. After the payback period, your solar panels essentially produce free electricity for the remaining 15+ years of their 25-30 year lifespan. Higher electricity rates and strong sun exposure lead to faster payback periods.
Yes. According to a study by Lawrence Berkeley National Laboratory (LBNL), homes with solar systems sell for an average of $15,000-$25,000 more than comparable homes without solar. The exact premium depends on your location, system size, and age. Many states including Connecticut offer property tax exemptions for the added value from solar, so you won't pay higher taxes even though your home is worth more.
Solar works best on south-facing roofs with minimal shading, but east-west orientations can still produce 80-90% of optimal output. Key factors include: roof condition (should have 15+ years of life left), tilt angle (30-45 degrees ideal), and shading from trees or nearby buildings. A reputable installer will perform a free site assessment using satellite imagery to estimate your production potential before you commit to anything.