Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Heat Pump Savings Calculator (vs Gas or Oil)

Compare the annual heating cost of a heat pump against a gas or oil furnace using your heat demand, the heat pump's COP, furnace efficiency, and both fuel prices.

Annual heat demand (delivered) (kWh/yr)

Heat pump COP (seasonal average)

Electricity price ($/kWh)

Furnace / boiler efficiency (%)

Fuel price (per kWh equivalent) ($/kWh)

Solar Energy

Solar Load Calculator

Calculate the total daily energy demand of your home's lighting, appliances, and HVAC to correctly size a solar system. Use this before getting solar quotes to know exactly how many kilowatt-hours per day you need to generate.

Lighting Load (watts)

Appliances Load (watts)

HVAC Load (watts)

Average Daily Usage (hours)

System Efficiency Factor

Key differences

	Heat Pump Savings Calculator (vs Gas or Oil)	Solar Load Calculator
Category	Solar Energy	Solar Energy
Inputs required	5	5
Result	Annual heating savings ($/yr)	Required Solar Capacity (kW)
What it does	Compare the annual heating cost of a heat pump against a gas or oil furnace using your heat demand, the heat pump's COP, furnace efficiency, and both fuel prices.	Calculate the total daily energy demand of your home's lighting, appliances, and HVAC to correctly size a solar system. Use this before getting solar quotes to know exactly how many kilowatt-hours per day you need to generate.