{
 "id": "mcs_average_battery_install_cost",
 "name": "Average cost of a home battery storage installation",
 "category": "costs",
 "value_num": 9000,
 "display": "Just around £9,000",
 "unit": "pounds per whole installation",
 "period_start": "2025-01-01",
 "period_end": "2025-12-31",
 "period_kind": "data",
 "deadline": null,
 "source_url": "https://mcscertified.com/consumers/technologies/battery-storage/",
 "source_org": "MCS",
 "checked_at": "2026-09-08",
 "recheck_by": "2026-12-08",
 "history": [],
 "public_note": "What people actually paid for battery storage last year, averaged across every size of battery fitted.",
 "next": null,
 "url": "https://hearthsum.co.uk/api/mcs_average_battery_install_cost.json"
}