Which water heaters use the least electricity?

Heat pump water heaters use the least electricity. They work by extracting heat from the air or ground and transferring it to the water, rather than using electricity to generate heat directly. This means they are much more energy-efficient than traditional electric water heaters.

Here is a comparison of the energy efficiency of different types of water heaters:

* Heat pump water heaters: 2.0-2.5 COP (coefficient of performance)

* Conventional electric water heaters: 0.95 COP

* Solar water heaters: 0.5-0.75 COP

* Gas water heaters: 0.5-0.75 COP

As you can see, heat pump water heaters are the most energy-efficient type of water heater, followed by solar water heaters, gas water heaters, and conventional electric water heaters.

Heat pump water heaters can save you a significant amount of money on your electric bill. The exact savings will depend on your specific climate and electricity rates, but you can expect to save hundreds of dollars per year.

In addition to saving you money, heat pump water heaters are also more environmentally friendly than other types of water heaters. They do not produce any emissions, so they help to reduce air pollution and greenhouse gas emissions.

Overall, heat pump water heaters are the best choice for homeowners who want to save money on their electric bills and reduce their environmental impact.