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Changelog — Plug-In Solar Legality Tracker
Dated history of changes to our 50-state plug-in solar legality tracker and its open dataset — state law signings and data updates, newest first.
Tracker last verified: June 15, 2026. L = law / legislative event · D = dataset / site update.
2026
- June 15, 2026 — D Tracker review: all seven signed states verified and labelled correctly; New Hampshire (SB 540) page published; Connecticut confirmed as the 7th state to sign.
- June 14, 2026 — D Published the structured 50-state dataset (plug-in-solar-laws.json), per-state JSON files, the developer docs and a Dataset schema; added per-state review dates.
- June 4, 2026 — L Connecticut signed HB 5340 (omnibus solar bill) — 7th U.S. state; plug-in / balcony solar provisions effective Oct 1, 2026 (1,200W cap).
- May 29, 2026 — L New York SUNNY Act (A.9111C / S.8512C) passed both legislative chambers; awaiting Gov. Hochul's signature.
- May 28, 2026 — L New Hampshire signed SB 540 — 6th U.S. state and first in the Northeast; 1,200W cap; effective July 27, 2026.
- May 12, 2026 — L Maryland signed HB 1532 (Utility RELIEF Act); emergency clause = effective immediately on signing; 1,200W cap.
- May 7, 2026 — L Colorado signed HB26-1007 — highest U.S. cap at 1,920W; effective Jan 1, 2027.
- April 22, 2026 — L Virginia signed HB 395 / SB 250; effective July 1, 2026; localities cannot ban balcony solar within the cap.
- April 6, 2026 — L Maine signed LD 1730; effective July 15, 2026 (up to 420W self-install, up to 1,200W with a licensed electrician).
2025
- March 2025 — L Utah signed HB 340 — the first U.S. state to fully legalize plug-in solar; effective May 7, 2025 (treated as appliances, no interconnection agreement within the cap).
Each legislative entry is sourced on the matching state page and mirrored in the open dataset. Informational, not legal advice — always confirm current rules with your utility and state authority.