Is Balcony Solar Legal in My State? US State-by-State Guide

There is no federal balcony solar law — legality is determined entirely at the state level. The one federal-level development relevant to balcony solar is UL 3700, a safety certification standard (not a legalization framework) launched January 2026.

UL 3700, the federal safety certification standard for plug-in solar devices, launched its testing and certification program on January 8, 2026 — but no complete balcony solar system has yet earned certification. Testing takes months, and no product from any brand has completed the process as of write-time. Don't assume a product marketed as "UL 3700 compliant" or similar has actually completed certification — verify the specific claim before relying on it.

This state count moves monthly, faster than most facts tracked in this guide — that's why this page refreshes every 60 days instead of the standard 6-month cycle. Signing dates for Colorado, Maryland, and Connecticut were cross-verified via secondary trackers, not primary legislative text — confirm exact dates against official state records before relying on them for anything time-sensitive.

For the full rules, savings estimates, and product options for a specific state, see the dedicated guide: Utah · Maine · Virginia · Maryland · Colorado · New Hampshire · Vermont · Connecticut

Utah was the first US state to sign dedicated balcony solar legislation, HB 340, in March 2025, effective May 7, 2025. It remains the state with the most established balcony solar market as a result — several hardware vendors reference Utah-specific compliance directly on their product pages.

Maine signed LD 1730 on April 6, 2026, with an effective date of July 2026.

Virginia signed HB 395/SB 250 on April 22, 2026, with an effective date of July 1, 2026 — the law is signed and already in effect as of write-time; localities cannot ban balcony solar within the state's 1,200W cap.

New York's SUNNY Act has passed the state legislature and awaits a governor's signature — it is pending, not yet law, and could still change before signing. New Hampshire and Vermont, previously in this pending category, are now confirmed signed — see the state table above.

For the full story of how this wave of legislation started — including why Utah moved first and why California, Florida, and Texas are still stuck — see how balcony solar became legal state by state.

If your state isn't on the signed or pending list, your best next step is contacting your local utility directly, since utility-level interconnection policy can sometimes matter even in the absence of state legislation. Do not assume balcony solar is either legal or illegal in an unlisted state without checking — the honest answer for most US states right now is "undetermined," not a clear yes or no.