Public data register
Calculator assumptions
Illustrative fuel prices and heat pump efficiency
The shared UK-average pence-per-kWh prices and typical heat pump performance factor used across the tools.
Provenance
Provenance documented
- What it is
- The shared UK-average pence-per-kWh prices and typical heat pump performance factor used across the tools.
- How it is produced
- Maintained editorial figure
- Source
- PowerGuardian monthly review of published cap rates and market averages
- Coverage
- United Kingdom
- Period
- Reviewed 2026-06-01
- Last verified
- 1 June 2026
- Update cadence
- Monthly
- Where it lives
src/data/toolAssumptions.ts → FUEL_PRICES_PENCE and HEAT_PUMP_SPF- Delivered by
- Held in the codebase registry
How the figure is produced
- One set of illustrative prices for electricity, gas, oil, LPG and biomass is shared by every tool that needs a default price.
- Each tool shows the review date, and every price is user-editable so you can substitute your own tariff.
The data
| Assumption | Value | Unit |
|---|---|---|
| Illustrative electricity price | 27 | p/kWh |
| Illustrative gas price | 6.5 | p/kWh |
| Illustrative oil price | 7.5 | p/kWh |
| Illustrative lpg price | 10 | p/kWh |
| Illustrative biomass price | 6 | p/kWh |
| Typical heat pump seasonal performance factor | 3 | ratio |
- PowerGuardian public data register — illustrative fuel prices
- Last reviewed: 2026-06-01
- Illustrative UK averages, not supplier quotes or capped rates. Every value is user-editable in the tools.
What this figure cannot tell you
- These are illustrative UK averages, not supplier quotes or capped rates.
- Oil, LPG and biomass prices are not regulated and vary widely by supplier, region and delivery volume.
Where it is published
Related records
- Ofgem Typical Domestic Consumption Values — The standard medium-household gas and electricity consumption figures used as calculator defaults.
- Calculator model assumptions — The physical and financial modelling constants behind the solar, battery, EV, heat pump and boiler calculators.
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