EPC C (2027) Calculator

Enter your building details to estimate the kWh reduction required to reach Band C rating by 2027. Includes solar PV generation estimates.

EPC C Reduction & Solar Estimator

Enter your current EPC and consumption to estimate the kWh reduction required to reach a typical Band C for your building type. Includes an estimated on-site PV generation option.

Current EPC Rating

Building Type

Annual Energy Use (kWh) — total annual usage

Total Floor Area (m²) — all floors

Usable Roof Area (m²) — area for PV

Leave blank or 0 if you don't want PV considered.

Quick notes:

Band C target values are typical benchmarks (editable in the script).
Estimator uses modelled energy intensity (kWh/m²/yr). Real EPC re-assessment may differ.
PV estimate: 0.15 kWp/m² & 850 kWh/kWp/yr UK yield (editable constants).

Selected target (Band C) for:

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Current intensity:

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100%

Required reduction (no PV)

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Estimated annual PV generation

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kWh/yr — using roof area

Required reduction (with PV offset)

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Current

Target C

PV Gen

Accurate Estimates

Our calculator uses industry-standard benchmarks to provide realistic estimates for your EPC improvement journey.

Solar PV Integration

See how solar panels can help offset your energy consumption and bring you closer to Band C compliance.

Downloadable Reports

Download your calculation results and share them with stakeholders or use them for planning purposes.