UK Household · heat-pump co-benefits · live model

Heat pump: install cost × SCOP

Each cell is the heat pump's marginal saving (£/yr vs keeping the gas boiler), computed live on a half-hourly model. Vary the home's solar and battery capacity below and watch how the picture changes.

on an Agile tariff gas 7.33p/kWh, boiler 85% capital discounted at 3%/yr
0510 kWp
01020 kWh
4k14k25k kWh/yr

⚠ Live dataset not found — using synthetic year (shape is indicative only).

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Table 1 — With the £7,500 BUS grant

Rows show the installer's gross price; the small figure is what you finance after the grant.

£/yr the heat pump saves vs the gas boiler (inc capital)

Table 2 — With no grant

Same installs, grant removed — you finance the full gross price.

Live from the household energy-ledger model (model.js + ledger.js), real half-hourly year at 15-min resolution. A heat pump here also disconnects the gas supply (induction cooking included). Solar & battery asset costs cancel out of the heat-pump marginal, so only their energy interaction moves these tables. Figures annualised, capital discounted at 3%/yr real.