Is Plug-In Solar Legal? State-by-State Guide (2026)

How Plug-In Solar Works (and Why Regulations Matter)

Panels feed a compatible microinverter, which converts solar power for use in your home. A qualifying system can connect through a permitted receptacle setup and reduce the electricity you buy. Check the system's certification, the circuit and mounting requirements, and your state, utility and property rules before connecting it.

The 1,200W Threshold: What Most Laws Say

Most enacted pathways cap qualifying output at 1,200W; Colorado allows up to 1,920W. Each law defines how to measure and combine that output. A panel's DC wattage is not the same as AC inverter output. A higher panel rating alone does not settle whether a kit qualifies: check the law's output test and the certified equipment configuration.

States with Enacted Plug-In Solar Laws

Ten states have signed plug-in solar into law. Six have frameworks in effect as of October 15, 2026; four have main provisions beginning in 2027. States are listed alphabetically below.

California: Signed, effective January 1, 2027

Governor Newsom signed SB 868 on September 30, 2026. Beginning January 1, 2027, qualifying plug-in solar devices may have combined AC output of up to 1,200W per dwelling. They must meet the national and California electrical codes and be certified as a plug-in photovoltaic system by UL or an equivalent nationally recognized testing lab. The outage-isolation feature must also be certified. The utility may require simple registration, but not approval. The interconnection exemption ends January 1, 2030; separate sales restrictions start that day.

Sources: Environmental Working Group | Bill status (Digital Democracy)

Colorado: In Effect Since August 12, 2026; Additional Provisions January 1, 2027

Governor Jared Polis signed House Bill 26-1007 into law on May 7, 2026, after it passed the House 48–16. The bill sets the highest wattage limit of any enacted state.

What the law allows:

• Portable-scale solar generation output up to 1,920W, the highest cap in the country
• No utility approval, no interconnection agreement, no fees for qualifying devices
• Meter collar adapters, with the Public Utilities Commission required to update interconnection rules by December 31, 2026

The general framework took effect August 12, 2026. Qualifying devices must be labeled and listed by a nationally recognized testing lab. Starting January 1, 2027, devices with output above 391W cannot be sold, leased or rented unless UL labeled and listed. The law does not name a specific UL standard. Devices at 391W or less have narrow installation and wiring-alteration exceptions, not a blanket certification exemption. The anti-restriction and property protections also start January 1, 2027; reasonable notice, safety and placement rules remain.

Connecticut: In Effect Since October 1, 2026

Governor Ned Lamont signed House Bill 5340 (Public Act 26-127) on June 4, 2026, as part of a broader renewable energy package.

What the law allows:

• Portable solar photovoltaic output up to 1,200W
• No utility approval, interconnection agreement, or fees for qualifying devices
• Devices must be certified by UL or an equivalent nationally recognized testing lab AND meet UL 1741. They must also meet the State Building Code, NEC/NFPA 70 and IEEE 1547 requirements and include outage protection. Only one qualifying device may be used behind a meter. Check how your meter handles surplus generation: the law warns it may be charged as usage without a suitable meter.

Maine: Law in Effect

Maine's bill LD 1730 passed on April 6, 2026.

What the law allows:

• Eligible systems up to 1,200W combined inverter output
• Up to 420W combined AC inverter output per service address, the law does not require the above-420W electrician and utility-notification process. Above 420W and up to 1,200W combined output, each system must be installed by a Maine-licensed electrician on a dedicated single-outlet circuit, with utility notice within 30 days. Systems must qualify through the law's UL 3700/applicable-standards route, a comparable testing-lab standard, or the adopted-NEC configuration route. That last route is about the equipment and wiring setup, not a certificate called NEC. People installing on property they do not own must protect the structure, follow codes and restore it on removal.

Maryland: Law in Effect Since July 1, 2026

Governor Wes Moore signed House Bill 1532 (the Utility RELIEF Act) on May 12, 2026, as an emergency bill; its portable-solar provisions took effect July 1, 2026.

What the law allows:

• One portable solar energy generating system per residential meter, up to 1,200W
• output
• Connection via a standard electrical outlet
• Notify the utility before installing and provide certification of the system's safety features and maximum output. The law exempts qualifying devices from utility approval and interconnection requirements, but requires certification by UL or an equivalent nationally recognized testing lab. It names neither UL 1741 nor UL 3700. Systems that send no more than 391W into a standard outlet are exempt from UL or equivalent testing-lab product-listing requirements that would require changes to the building, wiring or electrical panel. Check the exact kit's certification and your lease or HOA rules.

New Hampshire: Signed, Effective January 1, 2027

Governor Kelly Ayotte signed Senate Bill 540-FN (Chapter 262) on July 2, 2026. Its main provisions take effect January 1, 2027; the building-code section has a separate standards-certification contingency.

What the law allows:

• Portable solar generation devices up to 1,200W, output connected through a standard 120V receptacle
• No utility approval, interconnection agreement, or fees for qualifying devices
• Systems must be certified by a nationally recognized testing lab to national safety standards for distributed energy resources and plug-in solar systems. The final law does not say UL 1741 or IEEE 1547 alone is enough. Its main provisions start January 1, 2027. The separate building-code section starts only when the Department of Energy commissioner certifies that a nationally recognized standard exists for safe connection to a building's electrical system. This review has not confirmed that certification, so do not describe the code change as completed.

Utah: Law in Effect Since May 7, 2025

Utah was the first state in the country to formally legalize plug-in solar. House Bill 340 (Solar Power Amendments) was signed by Governor Spencer Cox on March 25, 2025, and took effect May 7, 2025. It passed the Utah House 72–0 and the Senate 27–0 — truly unanimous bipartisan support.

What the law allows:

• Systems up to 1,200W AC connecting via a standard 120V outlet
• Qualifying devices are exempt from utility approval, interconnection agreements and related utility fees. The utility cannot demand extra controls or equipment beyond the device, but the device still needs UL or equivalent testing-lab certification, current NEC compliance and outage protection. The law does not name a specific UL standard in this device definition. Check local electrical and property rules.
• Devices must be certified by UL or an equivalent nationally recognized testing laboratory and must include anti-islanding protection

Note: Utah plug-in solar systems are not eligible for Utah's net metering program. The benefit is bill reduction, not export credits.

Vermont: Law in Effect Since July 1, 2026

Governor Phil Scott signed S. 202 (Act 149) into law on June 16, 2026.

What the law allows:

• Plug-in photovoltaic devices up to a combined 1,200W output per electric meter
• No utility approval, interconnection agreement, or fees for qualifying devices
• Devices need UL 3700 or equivalent testing-lab certification, IEEE 1547-2018 or its successor, proper settings and secure attachment, and must connect through a smart meter. Customers with a net-metered system cannot add them. Tenants give at least 10 days' notice; landlords have 10 days to respond with reasonable restrictions. No response allows proceeding, but electrical work still needs landlord permission.

Virginia: Signed, Effective January 1, 2027

Virginia became one of the earlier states to legalize plug-in solar when Governor Abigail Spanberger signed House Bill 395 / Senate Bill 250 (Chapter 1052) into law on April 22, 2026.

What the law allows (effective January 1, 2027):

From January 1, 2027, qualifying devices are exempt from utility approval, interconnection agreements and related fees, but customers must notify the utility before installation. The utility has 15 days to review the form for accuracy and completeness and resolve deficiencies. Devices need testing-lab certification, NEC compliance and outage protection. Renter protection applies only to landlords owning more than four Virginia rental units or more than a 10% interest in more than four. Give seven days' notice with compliance documentation and the proposed location. Reasonable exterior-placement rules remain. Ratio-utility-billed units are excluded, and building, wiring or panel alterations need express written landlord approval. Check HOA or condo agreements too.

New Jersey

New Jersey: Signed September 1, 2026. Effective March 1, 2027. Max output: 1,200W. Bill: S2368 / A4836.

Starting March 1, 2027, qualifying devices may total up to 1,200W per service address or multifamily dwelling unit without utility approval. The law offers UL 3700, comparable-standard and combined-standard certification routes. Eligible renters who pay for their own electricity are protected within the area they rent, including a leased balcony or patio. Give the landlord and any applicable association 14 days' written notice, the location and proof of compliance. Reasonable size and placement rules, responsibility for damage and negligence-related claims remain. Building changes or electrical work can still need permits.

Sources: Legiscan A4836, LegiScan S2368

States Where Legislation Is Advancing in 2026

Massachusetts

H 5175 (the House's version of "An Act Relative to Energy Affordability, Clean Power and Economic Competitiveness") passed the House 128–27 on February 26, 2026, with plug-in solar provisions capping systems at 1,200W and banning utility fees for qualifying devices. The Senate passed its own version (S.3143) on July 1, 2026. A conference committee is now reconciling the two versions before a final bill goes to Governor Healey's desk.

Source: Massachusetts Legislature

New York

The SUNNY Act (S8512C / A9111C), sponsored by Sen. Liz Krueger and Assembly Member Emily Gallagher, passed both chambers of the legislature in late May 2026 and is awaiting further action; the current official record does not show a signature or confirm a delivery date or signing deadline. As passed, the SUNNY Act would cover devices with no more than 1,200W aggregate continuous AC inverter nameplate output. The C-version text requires listing or certification by an accredited nationally recognized testing lab as a complete plug-in photovoltaic system, plus code and manufacturer-instruction compliance and outage/maintenance protection. Certificates for separate parts do not automatically meet that complete-system requirement. It would take effect 90 days after becoming law. The bill is not present permission to connect a system; check the final signed text and current utility requirements before installing.

Source: New York State Senate bill text

Rhode Island

Companion bills H 7269 and S 2658 remain pending in committee as of the most recent session activity. Rhode Island has some of the highest electricity rates in the country, making it a closely watched state for plug-in solar advocates.

Other States with Active Bills

Bills remain pending in committee, without recent movement toward a floor vote, in Delaware (SB 270, which as introduced would cap devices at 800W), Michigan (HB 5764), North Carolina (HB 1129 / SB 957), Ohio (HB 755), Pennsylvania (HB 1971), and Washington, D.C. (B26-0602).

States with Stalled or Defeated Bills

Bills in the following states were introduced in the 2026 session but stalled, died in committee, or were defeated, in alphabetical order:

• Alaska (HB 257) — introduced but has not advanced.
• Arizona (SB 1606) — stalled in committee.
• Georgia (HB 1304) — held in committee without a vote in February 2026 after opposition from Georgia Power and the state's electric membership cooperatives; sponsors plan to reintroduce in 2027.
• Hawaii (SB 2902 / HB 1644) — stalled; Hawaii's electricity rates are the highest in the country, so a future law here would be especially high-impact.
• Idaho (HB 612) — stalled.
• Illinois (SB 3104 / HB 4371 / HB 4516) — the Senate version stalled in committee in April 2026 after union opposition over lineworker safety concerns; sponsors plan to revisit the issue in a future session.
• Indiana (SB 74 / HB 1084) — stalled in committee.
• Iowa (HF 2046 / SF 2056) — companion bills introduced but not advanced.
• Minnesota (HF 3555 / SF 3873) — folded into a broader omnibus bill; standalone progress has stalled.
• Missouri (HB 2528 / HB 2444) — introduced but has not moved forward.
• New Mexico (SB 157 / SM 10) — stalled.
• Oklahoma (HB 4060) — passed the House 88–4 but stalled in the Senate.
• Oregon (HB 4080) — did not move forward in the state legislature.
• South Carolina (H 4579) — stalled.
• Washington State (HB 2296) — passed the House 56–38 in February 2026, but the plug-in solar language was stripped before a larger bill passed.
• West Virginia (HB 5648) — stalled.
• Wyoming (HB 146) — voted down February 20, 2026.

Sources: The Current (Georgia), Capitol News Illinois, LegiScan, State of Wyoming Legislature, pv magazine USA, Bright Saver Legislation Tracker

States in the Regulatory Gray Area

Without a specific plug-in solar pathway, existing electrical, building and utility-interconnection rules may still apply. Do not treat the absence of a plug-in-specific ban, small size or zero-export operation as permission to connect. Before buying, ask the utility which process applies to the exact system and ask the local building or electrical authority about the proposed installation. This guide does not establish a nationwide enforcement-risk estimate.

What Is an Interconnection Agreement, and Do You Need One?

An interconnection agreement (ICA) is a contract between you and your utility that formally authorizes your system to operate in parallel with the grid. It establishes safety standards, metering requirements, and liability terms.

First check whether your state has a plug-in exemption and whether the exact system qualifies. An exemption may replace an interconnection agreement with a notice or registration process; it does not remove all safety or property rules. If the exemption does not apply, ask the utility's interconnection team which application, certificates, fees, inspections and permission-to-operate steps apply to your system. Processing times and study requirements vary. Do not assume a UL 1741 microinverter certificate or a zero-export setting alone establishes compliance of the assembled system. Check local electrical and building requirements before connecting.

Frequently Asked Questions

Is plug-in solar legal in the US?

The answer depends on your state, utility, equipment and installation. Some states have exemptions for qualifying plug-in systems; elsewhere, existing interconnection and safety rules may apply. A state law does not mean every kit or outlet is approved. Use the state notes and confirm current local and utility requirements.

What does "zero-export" mean and why does it matter?

Zero-export means the system is designed and controlled to prevent power from flowing onto the utility grid. It is different from shutting down during an outage. Do not assume an ordinary utility smart meter provides export control. Non-export operation does not automatically remove interconnection requirements; check the applicable state exemption and utility rules for the exact system.

Can I install two 1,200W systems to get 2,400W without an interconnection agreement?

Do not assume two separate kits each get their own allowance. California combines qualifying AC output per dwelling; Maine combines inverter output per service address; Vermont combines inverter capacity per meter. Colorado permits a single system per address, and Connecticut and New Hampshire limit the number of devices or systems behind a meter. A larger setup needs a separate check of the utility's interconnection process and local rules.

Do I need a building permit?

Permit requirements depend on the location, mounting, wiring work and state or local rules. An exemption from utility approval is not automatically a building or electrical permit exemption. Check with the local building or electrical authority before installing, including for a ground-mounted or balcony setup.

Can my landlord prohibit me from using plug-in solar?

Some plug-in laws expressly limit landlord or HOA bans, but the details differ. Vermont has a tenant-notice process and protections against prohibitive covenants. Colorado's anti-restriction rules start January 1, 2027; New Jersey's protections start March 1, 2027. Virginia's January 1, 2027 renter protection covers only certain landlords and leaves notice, placement and alteration limits. Other reviewed plug-in laws do not add an express landlord/HOA anti-ban provision. That does not settle rights under other laws. Check the state notes, your lease or association rules and required notice before installing.

What is the status of the UL 3700 certification?

UL Solutions announced its plug-in solar testing and certification program based on UL 3700 on January 8, 2026. UL 3700 addresses plug-in photovoltaic equipment and systems. State requirements differ: some expressly name UL 3700 or alternatives, Connecticut also expressly requires UL 1741 compliance, and other laws use testing-lab certification without naming a specific standard. Check the certificate for the exact product and evaluated setup. Certification of individual components is not automatic proof that an assembled kit meets a state's complete-system requirement.

Appendix: Full State-by-State Data Table

The table below lists every US state's plug-in solar legislative status, maximum system wattage, and key dates in one place. It reflects the same dataset used in the interactive map above and is sourced from original bill text where available.

*Colorado's general provisions took effect August 12, 2026; the sale restriction on uncertified sub-391W devices and the anti-restriction/HOA protections are separately delayed to January 1, 2027 under the bill's own text.

This article is for informational purposes. Enacted-state and New York dates/status were checked October 15, 2026; other legislative entries retain their last recorded status and were not part of this date review. Solar regulations change frequently. Always verify the current requirements with your state's public utilities commission and your utility's distributed generation team before installation.