Heat pump electricity and cost calculator

Estimate heat pump electricity use from annual heat demand and SCOP, then compare running costs with direct electric or gas heating.

Last reviewed: 8 September 2026 · Methodology

Calculate

Annual heat demand (kWh heat)0 – 1,00,00,00,000SCOP / annual performance0.1 – 12Installation cost0 – 1,00,00,00,000Compare with gas

Electricity price (INR/kWh)0 – 10,000

Country reference price selected.

₹8.00/kWh is an illustrative input, not an India-wide average or an official electricity tariff. Replace it with the applicable rate for your state, DISCOM, consumer category and consumption slab.

Last reviewed: 9 September 2026

Published prices and supplier examples

Each reference applies only to its stated period, area and customer profile. Fixed charges and partial bill components are shown for context; only comparable variable prices can be applied.

Tata Power-DDL · Delhi · 201–400 kWh/month
4.5 INR/kWh · Base schedule from 01 Oct 2021 · FY26 handbook
Domestic energy charge only, reproduced in the official FY26 customer handbook. This band applies within the household's monthly slab calculation, not to an appliance in isolation. Excludes fixed charges, PPAC/FPPAS, regulatory and pension surcharges, electricity tax and subsidies. The base schedule is published from 1 October 2021; verify current adjustments on your bill. This is not an all-India average or the full cost of a kWh.
Tata Power-DDL · Customer handbook FY26, pp. 9–10 · Last reviewed: 10 September 2026
Context only: this is not a complete variable price for estimating savings.
MSEDCL · Maharashtra · 101–300 kWh/month
10.8 INR/kWh · FY 2026–27 · from 01 Apr 2026
Domestic LT-I(B), sanctioned load below 20 kW, energy charge only. The applicable slab depends on the household's total monthly consumption. Wheeling of ₹1.60/kWh, fixed charges of ₹130/month (₹435 for three-phase), FAC, taxes and any subsidy are separate. This example is not a complete bill, supplier ranking or national average.
MSEDCL · Tariff order 25 March 2026, p. 95 · Last reviewed: 10 September 2026
Context only: this is not a complete variable price for estimating savings.

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Your estimate

Estimate — adjust the assumptions to your situation.

Annual cost₹32,000.00

Consumption4,000 kWh

Direct electric heating cost₹96,000.00

Annual saving₹64,000.00

Simple payback (years)0.13 years

Illustrative variable rate per kWh. Replace with your bill; fixed charges are excluded.

Start with useful heat demand, not electricity or gas consumption taken unchanged from a bill. Enter a seasonal performance estimate appropriate to the installation. You can include a gas alternative when its energy price, efficiency and relevant fixed charges are known.

Formula

Heat pump electricity = annual useful heat demand ÷ SCOP. Running cost = electricity × unit price. Direct electric heating is modelled at one unit of heat per unit of electricity. Gas cost = heat demand ÷ boiler efficiency × gas unit price + entered fixed charges.

Worked example

A home needing 12,000 kWh of useful heat with a SCOP of 3 requires an estimated 4,000 kWh of heat pump electricity annually. A SCOP of 4 reduces that estimate to 3,000 kWh.

What the result means

Positive savings mean lower modelled energy costs against the selected alternative. For a replacement decision, enter the additional investment to be recovered rather than an unrelated project total.

Electricity price · India

Electricity duty, fuel or power purchase adjustments, fixed charges and subsidies depend on the applicable state and DISCOM rules. No national tax percentage or subsidy is assumed. Slab thresholds, sanctioned-load charges and time-of-day tariffs are not automatically modelled.

Assumptions and limits

Weather, insulation, flow temperature, hot water, defrosting and backup heating influence real performance. Maintenance, grants, finance and future tariff changes are excluded.

Questions answered

Is COP interchangeable with SCOP?

COP describes performance at a particular condition; annual estimates need a seasonal value.

When does payback disappear?

If annual savings are zero or negative, the model cannot calculate a finite simple payback.

Methodology · Report an error

Data sources

Last reviewed: 2026-09-08