Sol Country Open Data API

Free, public, no API key required. Sol Country's balcony solar legislation data for all 50 states — updated weekly, licensed CC BY 4.0.

Data last verified: August 7, 2026

About this data

Sol Country maintains the most frequently updated primary-source verified balcony solar legislation tracker in the US. We update the same day any state signs, advances, or stalls — and verify every status against official state legislature websites, not secondary sources.

This API makes that data freely available for developers, researchers, journalists, and other platforms. The only requirement is attribution.

Required attribution:
Data from Sol Country (solcountry.com)
Licensed CC BY 4.0
Link: https://solcountry.com/tracker

Endpoints

GET/api/v1/legislation/states

Returns current legislation status for all 50 US states.

{
  "data_version": "1.0",
  "last_verified": "2026-08-07",
  "license": "CC BY 4.0",
  "states": [
    {
      "state": "Colorado",
      "state_code": "CO",
      "status": "signed",
      "effective_date": "2027-01-01",
      "wattage_cap_w": 1920,
      "lower_tier_w": 395,
      "landlord_protection": true,
      "sol_country_page": "https://solcountry.com/state/colorado"
    },
    {
      "state": "Connecticut",
      "state_code": "CT",
      "status": "signed",
      "effective_date_utility": "2026-08-12",
      "effective_date_landlord": "2027-01-01",
      "wattage_cap_w": 1200,
      "landlord_protection": true,
      "sol_country_page": "https://solcountry.com/state/connecticut"
    }
    ...48 more states
  ]
}

GET/api/v1/legislation/states/{state_code}

Returns data for a single state. Replace {state_code} with a 2-letter US state abbreviation (e.g. CO, CA, NY). An unknown code returns 404 with the list of valid codes.

GET /api/v1/legislation/states/NY

{
  "data_version": "1.0",
  "last_verified": "2026-08-07",
  "states": [
    {
      "state": "New York",
      "state_code": "NY",
      "status": "awaiting_governor",
      "bill": "SUNNY Act (A.9111-C/S.8512C)",
      "effective_date": "90 days after signing",
      "wattage_cap_w": 1200,
      "note": "Governor has until end of 2026 to sign or veto",
      "sol_country_page": "https://solcountry.com/state/new-york"
    }
  ]
}

GET/api/v1/legislation/summary

Returns a summary count of states by status. Useful for dashboards and widgets.

{
  "last_verified": "2026-08-07",
  "signed": 8,
  "awaiting_governor": 3,
  "advancing": 5,
  "total_states": 50
}

Status values

"signed"Signed into law

"awaiting_governor"Passed both chambers, awaiting signature

"advancing"Active legislation moving through chambers

"introduced"Bill introduced

"failed"Did not pass this session

"no_legislation"No bill introduced

Rate limiting

60 requests per hour per IP address. Every response includes x-ratelimit-limit, x-ratelimit-remaining, and x-ratelimit-reset headers. Going over the limit returns HTTP 429 with a retry_after_seconds value. For higher volume needs or to be notified of data updates, email info@solcountry.com.

Changelog

2026-08-07Open Data API v1 published
2026-08-07New Hampshire effective date verification in progress
2026-08-07New York immediate effective date confirmed
2026-07-03New Hampshire signed SB 540 (8th signed state)
2026-07-01Massachusetts and New Jersey passed both chambers
2026-06-28Maryland sub-391W UL exemption verified against HB 1532
2026-06-19Vermont signed S.202 (effective July 1 2026)
2026-06-10California SB 868 cleared Assembly Utilities & Energy 18-0
2026-06-04Connecticut signed HB 5340 (two-stage effective date)
2026-06-01New York legislature passed the SUNNY Act
2026-05-20California SB 868 passed the full Senate 35-1
2026-05-12Maryland signed HB 1532 with an emergency clause
2026-04-01Colorado HB26-1007 signed (first state)
2026-03-01Virginia HB395 signed (effective January 1 2027)
2026-02-01Washington HB 2296 plug-in provision stripped before passage

Embed the current count on your site

<script src="https://solcountry.com/embed/legislation-count.js"></script>
<div id="solcountry-count"></div>

This embed shows the current signed state count, auto-updated from Sol Country's API. Free to use with the CC BY 4.0 attribution shown in the widget. Clicking the pill opens the tracker in a new tab.

Questions

Corrections, higher-volume access, or update notifications: info@solcountry.com. Data last verified 2026-08-07.