How to Read Your Eversource Solar Bill: Net Metering Credits Explained
Once your Connecticut solar system receives Permission to Operate and your bi-directional meter is installed, your Eversource or United Illuminating bill looks completely different than it did before solar. Most homeowners are confused by their first few solar bills. This guide explains exactly what the charges and credits mean, how the 12-month true-up works, and how to tell whether your system is performing as expected.
How Connecticut Net Metering Works
Net metering credits you for every kilowatt-hour your solar system exports to the grid at the retail rate. Connecticut's net metering rules allow residential customers to offset up to 100% of their annual electricity consumption through solar credits. The credit accumulates monthly and is applied against your consumption charges.
During the day (solar producing)
Your panels generate electricity. Your home uses what it needs first. Any surplus is exported to the Eversource or UI grid, and your meter runs backward - you earn a kilowatt-hour credit for each kWh exported.
At night or on cloudy days
Your home draws electricity from the grid normally. Your meter runs forward, subtracting from accumulated credits. If you have more credits than consumption for the month, credits carry forward.
Monthly billing
Each month, Eversource or UI calculates net consumption (grid import minus solar export). If you exported more than you imported, you carry a credit balance. If you imported more, you owe the difference at the current retail rate.
Annual true-up
Connecticut has a 12-month banking period. At the end of each 12 months, any remaining credit balance is paid out at the wholesale rate (approximately $0.04-$0.07/kWh) rather than the retail rate ($0.24-$0.27/kWh). This is why oversizing your solar system slightly beyond 100% annual offset is not financially optimal.
Reading Your Eversource Solar Bill
A typical Eversource bill for a solar customer has these line items. Understanding each one tells you whether your system is working correctly:
| Line item | What it means | Good or concerning? |
|---|---|---|
| kWh delivered | Electricity imported from the grid (what you used that solar did not cover) | Lower than pre-solar = good |
| kWh received | Electricity exported to the grid from your solar panels | Higher in summer = expected |
| Net metering credit | Dollar value of your exported kWh at the retail rate, applied as a bill credit | Should offset delivery charges |
| Customer charge | Fixed monthly fee (~$10-$15) charged regardless of usage or solar generation | Cannot be offset by solar credits |
| Distribution charge | Per-kWh charge for using the grid infrastructure (applies to net consumption) | Goes to near-zero in high solar months |
| Transmission charge | Per-kWh charge for regional grid transmission (applies to net consumption) | Goes to near-zero in high solar months |
| Standard offer supply | Per-kWh generation charge for electricity from the utility power pool | Offset by net metering credits |
| Credit balance carried forward | Excess credits from this month rolling into next month | Should grow in spring/summer |
Seasonal Pattern: What to Expect Month by Month
Connecticut solar production is highly seasonal. A properly sized system should show this monthly pattern:
How to Tell If Your System Is Underperforming
Your installer should provide a production estimate (in annual kWh) when you sign the contract. Compare this against your actual production in the monitoring app (Enphase Enlighten, Tesla app, SolarEdge portal). Red flags:
- Production is more than 15% below the estimate in a non-cloudy month
- One or more panels show significantly lower production than the rest (inverter or microinverter issue)
- Your bill increased after solar installation (check whether the PTO was actually processed)
- The monitoring app shows the system offline for more than a few hours
- Your kWh received on the Eversource bill is zero despite sunny months
If your system is underperforming, check your monitoring app first, then contact West Electric. Most underperformance issues are caused by a single failed microinverter, a communication gateway offline, or an inverter fault - all diagnosable remotely before scheduling a site visit.
Battery Storage and Your Bill
A battery storage system (Powerwall 3, Enphase IQ Battery) changes the net metering math. Instead of exporting surplus solar directly to the grid, the battery stores it for evening use. This reduces your grid imports at peak rate hours but also reduces your net metering export credits. The financial outcome depends on whether you are on a TOU rate:
- On a flat rate: battery self-consumption value equals the retail rate. Same as net metering credit value. No financial benefit to prioritizing self-consumption over export.
- On a TOU rate: battery can store solar production and discharge during peak rate hours, earning more per kWh than the export credit at off-peak times. TOU rate is the scenario where battery + solar delivers maximum bill reduction.
Connecticut Solar Installation with Monitoring
West Electric installs solar systems with full monitoring via Enphase Enlighten or the equivalent for other inverter brands. We walk you through your first bill after activation so you understand exactly what you are seeing.
GET A FREE SOLAR ESTIMATEWest Electric is Connecticut's trusted electrical contractor, providing professional insight into the latest energy and safety trends.
More from the blog
Solar
How to Save on Energy with Solar
Discover how high-efficiency solar panels can drastically reduce your monthly utility bills.
EV Charging
EV Charging: Home vs Public
Understanding the benefits of installing a Level 2 home charger for your electric vehicle.
Safety
Preventing Electrical Fires
Key safety tips and inspection schedules to keep your home's electrical system safe.
Ready for an estimate on your project?
Free site visit. Written quote. Licensed Connecticut electricians.
Get a Free Estimate