Plug-in solar law in Connecticut

Last checked September 25, 2026 — Claude Code, from primary sources (pending owner review)

The plug-in solar rules are Section 9 of Public Act 26-127, "An Act Concerning Renewable Power Generation" — a forty-page energy act whose other sections are about tariffs, shared clean energy facilities and storage. Section 9 is two pages of it, and it took effect on 1 October 2026.

Section 9 does not amend an existing statute; it creates a new one. So there is no older version of these rules to compare against, and no prior Connecticut law on plug-in solar that it replaces.

Status

Enacted

Statute: Conn. Public Act No. 26-127, Sec. 9 (H.B. 5340, 2026 Feb. Sess.) · Last checked September 25, 2026

The rules in Connecticut

System size limit	1,200 W — but the law does not say whether that is measured as AC inverter output or DC panel rating The statute caps "maximum power output" without naming a measurement point, so a kit whose panels are rated above the limit but whose inverter is below it — the common case — has no clear answer under the text. Where our checker cannot tell, it says so instead of guessing.
How the limit is measured	The law does not say
Certification required	NRTL listing required
Batteries	Not addressed

What you owe your utility

Notify the utility	Not required This act imposes no notification duty. It does not say so in as many words, and it does not reach your utility’s own tariff or terms of service, so it is still worth asking before you install.
Utility approval before switching on	Not required

Provisions worth knowing about

These are in the Connecticut law but do not fit any row in the tables above.

Excess generation is charged to you as usage, and the warning goes on the device. A conforming device must include a consumer warning stating that generation exceeding consumption at the customer’s location "will result in such excess generation being charged to the customer as usage unless such customer utilizes an electric meter that allows for net metering". No other state we have researched puts this on the product itself. source
Anti-islanding is a condition of legality, not a feature. The device must include something that prevents it from energizing the building’s electrical system during a power outage. source
UL 1741, not UL 3700. Connecticut names the inverter standard; Vermont, New Jersey and Maine name the plug-in photovoltaic system standard. Neither listing implies the other. source
One device per electric meter, and it must not be permanently affixed to a structure. Both the interconnection exemption and the restriction on utilities are conditioned on the one-device limit. source
The device must meet the State Building Code, the National Electric Code (NFPA-70) and IEEE 1547 — and the exemption expressly does not reach the State Building Code, the Fire Safety Code, the State Fire Prevention Code, or any local ordinance. source
Section 10 sends the rules back to the code bodies. The State Building Inspector, the State Fire Marshal and the Codes and Standards Committee must consider safe-installation provisions for these devices in the next amendments to the building and fire codes, so the code requirements are expected to change. source

Renters and HOAs

Renters	Not addressed
HOA / condo rules	Not addressed

Dates that matter

Effective date	October 1, 2026
Signed by the Governor as Public Act 26-127	June 4, 2026
Sec. 9 (portable solar generation devices) takes effect	October 1, 2026

Sources and verification

Statute / bill text: Conn. Public Act No. 26-127, Sec. 9 (H.B. 5340, 2026 Feb. Sess.)

Other primary sources:

Last checked: September 25, 2026 by Claude Code, from primary sources (pending owner review)

This is not legal advice. Rules change, and utilities apply them differently. Confirm the current requirements with your utility and the state authority before installing anything.