Connecticut HB 5340 Is Now Law: What the 2026 Solar and Battery Storage Act Means for Homeowners and Electricians

Governor Lamont signed HB 5340 -- Connecticut's omnibus solar bill -- as Public Act 26-127, enacted May 20, 2026. The law creates a statewide automated permitting platform for residential solar systems up to 25 kW, legalizes plug-in balcony solar up to 1,200 watts without utility approval, and extends net metering incentive programs through at least 2035. For Connecticut homeowners considering solar installations, the permitting landscape is about to get significantly simpler.

The Automated Permitting Platform and What It Changes for Residential Solar

One of the most practically significant provisions of Public Act 26-127 is the requirement for a statewide automated online permitting platform for residential solar and battery storage systems up to 25 kilowatts. Currently, Connecticut homeowners experience wide variation in how municipalities handle solar permits: application forms differ by town, fees range from under $200 to over $2,000 for identical systems, and processing times vary from same-week to several months depending on the local building department. This patchwork of inconsistent processes has been a meaningful friction point for solar installation growth in Connecticut.

The automated platform is designed to standardize the application process statewide, reduce the cost and time burden on homeowners and installers, and allow automated approvals for systems that meet standard specifications. The state must deploy the platform by July 1, 2028, and all Connecticut municipalities must adopt and use it by January 1, 2029. Until then, the existing municipal permit processes remain in effect, but installers and homeowners can expect the transition to begin in some municipalities earlier than the deadline as the system is piloted.

For homeowners planning solar installations in the near term, the most important practical reality is that permitting still follows the current municipal process. A licensed Connecticut electrical contractor handles the permitting and inspection coordination as part of the installation. The new law does not change that structure; it changes who sets the forms and fees for the process. TJF Electric manages permitting for solar-related electrical work throughout Connecticut.

Plug-In Balcony Solar: What Is Now Legal Starting October 1, 2026

Starting October 1, 2026, Connecticut law allows any household to install a plug-in solar device -- typically a compact solar panel array designed to plug directly into a standard 120-volt outlet -- up to a combined capacity of 1,200 watts per dwelling unit. These devices, common in Germany and other European markets and sometimes called balcony solar or plug-in PV, generate electricity that flows directly into the home's electrical system through the outlet, offsetting consumption at the meter. Connecticut becomes the sixth U.S. state to expressly authorize this approach.

The legal significance of the new provision is that it removes the regulatory barriers that previously made plug-in solar difficult: no utility approval is required, no interconnection agreement needs to be filed, and utilities cannot charge added fees for the connection. The 1,200-watt limit is per dwelling unit -- a multi-unit building with several apartments can have multiple plug-in systems at that limit. The equipment must meet applicable safety standards, and the plug-in must connect to a properly grounded outlet, but the permitting requirement that applies to full rooftop systems does not apply to devices within this specification.

For homeowners who want to generate some solar power without a full rooftop installation, plug-in solar provides a lower-cost, lower-commitment entry point. For apartment residents and condo owners who cannot access the roof, it may be the only practical solar option. TJF Electric can advise on whether the existing outlets in your home or unit are appropriately rated for a plug-in solar device and whether any electrical work is needed to support the installation safely.

Net Metering Extension, Battery Storage, and the Broader Picture for Connecticut Solar

Public Act 26-127 extends Connecticut's net metering and solar incentive programs through at least 2035. Net metering allows solar system owners to send excess electricity back to the grid and receive credit on their utility bill at the retail rate, which is the most financially significant incentive for residential solar in Connecticut. The extension removes a significant uncertainty: prior to this law, program continuity was reviewed periodically, and the lack of a long-term commitment made it harder for homeowners to calculate the return on a solar investment with confidence. The 2035 extension provides a 9-year planning horizon.

The law also addresses battery storage systems alongside solar. Residential battery storage -- systems that store solar generation or grid power for use during outages or peak-rate periods -- is included in the automated permitting platform provisions. Battery storage installations require their own electrical permits, and the interconnection and safety requirements for battery systems are more complex than those for solar panels alone. TJF Electric is licensed to install both solar-adjacent electrical infrastructure and battery storage systems, including the service panel upgrades that many Connecticut homes require before a battery storage system can be installed.

The combination of the permitting streamlining, the plug-in solar authorization, and the net metering extension makes 2026 a particularly significant year for Connecticut homeowners thinking about solar. If you have been considering a system but have not taken the next step, contact TJF Electric for an assessment of your current electrical service, the panel upgrade requirements your system would need, and how permitting will work under both the current municipal process and the incoming statewide platform.

6 Things Connecticut Homeowners Should Know Before Going Solar in 2026

Public Act 26-127 changed some things and left others unchanged. Here is the current landscape for Connecticut homeowners weighing a solar installation.

1. The automated permitting platform is not live yet -- current municipal processes still apply: The platform must be deployed by July 2028. Until then, your solar permit goes through your local building department under the current town-specific process. Timelines and fees still vary significantly by municipality.
2. Plug-in solar (up to 1,200W) requires no utility approval starting October 1, 2026: If you want to start small or live in a condo where rooftop solar is not possible, plug-in devices within the 1,200-watt limit will be fully legal with no utility sign-off required after October 1. The outlet must be properly grounded and rated.
3. Net metering credit rates and terms still vary by utility: The law extends net metering programs through 2035 but does not standardize the credit rates across Eversource, United Illuminating, and municipal utilities. Check your utility's current net metering program details.
4. Most Connecticut homes need a panel upgrade before a battery storage system can be installed: Battery storage systems typically require a 200-amp service panel and specific breaker configurations. An electrical assessment before you purchase a battery system prevents unexpected costs after the equipment arrives.
5. A licensed electrical contractor handles permits for full solar installations: Rooftop solar systems and battery storage installations require electrical permits, which must be pulled by a licensed Connecticut electrical contractor. Homeowner self-permitting for full systems is not the standard path in Connecticut.
6. The 30C federal tax credit for EV chargers expired June 30, 2026 -- but the energy storage credit remains: The federal residential clean energy credit (Section 25D) still applies to battery storage systems installed alongside or independent of solar panels. Unlike the EV charger credit, it was not set to expire June 30. Consult a tax professional to verify your eligibility.

Frequently asked questions

Does Public Act 26-127 change anything about how my existing solar system is treated?

For existing systems that were permitted and installed under prior rules, the main benefit is the net metering program extension through 2035 -- your current net metering agreement should continue under the program structure that was in place when your system was installed, with greater certainty about the program's longevity. The new law does not require changes to existing compliant systems.

Can I install a plug-in solar device myself, or do I need an electrician?

The plug-in solar provision, effective October 1, 2026, does not require a licensed electrician for the plug-in device itself -- that is the point of the no-permit authorization. However, if the outlet you plan to use is not properly grounded or rated for the load, you may want an electrician to verify the outlet before connecting the device. Any wiring modifications to support the device would require a licensed electrician and a permit.

Will the automated permitting platform change how TJF Electric handles solar permits?

When the platform launches, it will standardize the application process and may reduce permitting fees and timelines significantly. TJF Electric will use the platform as it becomes available in each municipality. For now, our process remains the same: we handle all permitting and inspection coordination as part of any solar-related electrical project.