North Carolina had offered full retail net metering since 2000, and Charlotte homeowners who installed solar before July 1, 2023 were grandfathered into those legacy terms through December 31, 2026. For new solar customers after October 1, 2023, the North Carolina Utilities Commission approved Duke Energy’s Net Metering Bridge program as a transitional structure.
Under NMB, the mechanics work as follows: when your solar panels generate electricity and your home is consuming power at the same time, that production offsets your grid draw at the full retail rate of 14.1¢/kWh — no change there. The NMB penalty applies only to true excess generation: kilowatt-hours produced beyond what your home is consuming at that moment, which flow to the grid and earn a credit of 3.4¢/kWh. Those credits carry forward month to month but are reset annually, and they cannot offset the Basic Facilities Charge or capacity charges on your bill. Duke Energy Carolinas NMB customers also pay a minimum monthly charge of $22 and a capacity-based charge of $0.28 per kW-DC of system size — approximately $3.80/month for a 13.6kW system. The alternative rider, Residential Solar Choice (RSC), places customers on a time-of-use rate structure with off-peak rates around 10¢/kWh and on-peak rates around 21¢/kWh. Most Charlotte solar advisors recommend NMB over RSC for most homeowners because the flat-rate simplicity and monthly crediting outperform the TOU complexity for typical usage patterns.
The pending Duke Energy Carolinas rate case — filed in late 2025 and expected to yield new rates effective January 1, 2027 — proposes increases of approximately $17.22/month for a 1,000 kWh residential customer in year one, followed by an additional $6.34/month in 2028. If approved at or near the requested level, Charlotte’s retail rate climbs to approximately 16.2¢/kWh in 2027 and 16.8¢/kWh in 2028. That directly improves the value of every kilowatt-hour a Charlotte solar system self-consumes — improving payback without changing system cost.
The single most important installation decision for Charlotte homeowners under NMB is system sizing relative to actual consumption. This is true everywhere, but the consequence of oversizing in Charlotte is unusually steep.
In a full retail net metering market like New York, a homeowner who installs a 15kW system on a house that uses 10,000 kWh annually still gets full retail value for the 5,000 kWh excess they export — the extra capacity builds credit that offsets future bills at the same 14.1¢ rate. Under Charlotte’s NMB, those same 5,000 exported kWh earn 3.4¢ each — $170 instead of $705. The difference represents lost value every year for 25 years, compounding substantially over the system’s lifetime. Competent Charlotte installers model a system sized to keep monthly exports minimal — ideally near zero — by matching annual production closely to annual consumption. The average Charlotte system size per EnergySage is approximately 13.6kW, reflecting the city’s high household consumption (~$202/month average bill at 14.1¢ = roughly 1,430 kWh/month = ~17,160 kWh annually). At 5.2 peak sun hours, a 13.6kW system in Charlotte produces approximately 25,000–26,000 kWh annually, suggesting significant exports under today’s conditions. Homeowners with EVs, heat pump systems, or other large electrical loads benefit from solar economics more favorably because higher consumption absorbs more production at the retail rate.
Battery storage meaningfully changes this calculation. A home battery stores daytime solar surplus that would otherwise export at 3.4¢, and dispatches it in the evening when the homeowner would otherwise draw from the grid at 14.1¢. The storage arbitrage is 10.7¢/kWh — significant. This is precisely why Duke Energy’s PowerPair program targeting solar-plus-battery is so strategically relevant in the NMB environment: the program effectively steers customers toward the combination that makes the most financial sense under reduced export compensation.
North Carolina’s incentive landscape for Charlotte homeowners is leaner than New York’s but has one standout program in PowerPair. There is no state income tax credit for solar in North Carolina, and no state sales tax exemption — Charlotte homeowners pay the full applicable sales tax on solar equipment and installation. The two available incentives are:
Duke Energy’s PowerPair rebate provides up to $9,000 for a solar-plus-battery system: up to $0.36/W for the solar inverter capacity (capped at 10kW inverter = $3,600 maximum) plus $400/kWh for a battery up to 13.5kWh capacity ($5,400 maximum). The total $9,000 is applied as a bill credit after installation and verification. Program capacity is limited — as of October 2024, approximately 64% of Duke Energy Carolinas allocation remained — and enrollment is first-come, first-served during an annual application window opening May 10. Installers must be Duke Energy-approved Trade Allies, and only equipment from Duke’s approved battery vendor list qualifies. Homeowners who enroll in the PowerPair + EnergyWise program (granting Duke access to dispatch the battery 30–36 times per year for grid support) earn additional ongoing monthly bill credits based on the battery’s continuous power rating.
North Carolina’s Solar Energy System Property Tax Exclusion protects 80% of the solar system’s added value from property tax assessment. When solar increases a home’s assessed value, only 20% of that incremental value is taxable — an 80% exemption. For a Charlotte home where solar adds $15,000 in value, only $3,000 of that is subject to property tax. At Mecklenburg County’s property tax rate, this saves several hundred dollars annually over the assessment period. The exemption applies automatically and does not require a separate application for residential, non-business systems. There is no equivalent sales tax relief at the state level.
A 13.61kW system in Charlotte at $2.33/W costs approximately $31,700 before any incentives. After the PowerPair solar rebate ($3,600 on a 10kW-inverter system), the net before property tax savings is approximately $28,100. The property tax exemption doesn’t reduce upfront cost but lowers the annual tax burden on the added home value for the life of the system. EnergySage projects a 9.6-year payback and approximately $36,400 in 25-year savings for Charlotte homeowners — a solid return given below-average electricity rates, strong sun, and low installation costs.
