{
 "id": "est_typical_system_cost",
 "name": "Typical home solar system cost, Energy Saving Trust",
 "category": "costs",
 "value_num": 7600,
 "display": "Around £7,600 for a 4.5 kWp system",
 "unit": "pounds per whole installation",
 "period_start": "2026-08-27",
 "period_end": null,
 "period_kind": "page_date",
 "deadline": null,
 "source_url": "https://energysavingtrust.org.uk/advice/solar-panels/",
 "source_org": "Energy Saving Trust",
 "checked_at": "2026-09-08",
 "recheck_by": "2026-12-08",
 "history": [],
 "public_note": "The Energy Saving Trust's own worked example, useful as a sense check against any quote you are given.",
 "next": null,
 "url": "https://hearthsum.co.uk/api/est_typical_system_cost.json"
}