{
 "id": "solar_cost_per_kw_0_4kw",
 "name": "Solar PV installed cost, 0 to 4 kW systems, all installations",
 "category": "costs",
 "value_num": 1595.06,
 "display": "£1,595.06/kW median · £1,808.43/kW mean, homes and businesses together",
 "unit": "pounds per kW of total installed capacity (TIC), domestic and non-domestic installations",
 "period_start": "2025-04-01",
 "period_end": "2026-03-31",
 "period_kind": "data",
 "deadline": null,
 "source_url": "https://www.gov.uk/government/statistics/solar-pv-cost-data",
 "source_org": "DESNZ (from the MCS Installation Database)",
 "checked_at": "2026-09-08",
 "recheck_by": "2027-05-27",
 "history": [
  {
   "period": "2024/25",
   "value_num": 1666.67,
   "display": "£1,666.67/kW median · £1,873.29/kW mean (120,535 installations)"
  },
  {
   "period": "2023/24",
   "value_num": 1910.11,
   "display": "£1,910.11/kW median · £2,086.54/kW mean (83,563 installations)"
  }
 ],
 "public_note": "The same government record, but counting business installations alongside homes. Businesses pay less per kW, so this figure sits below the homes-only one. If a price guide quotes a government per-kW figure without saying whether it is homes only, this is probably the one. The rate has fallen two years running.",
 "next": null,
 "url": "https://hearthsum.co.uk/api/solar_cost_per_kw_0_4kw.json"
}