Solar, Tankless or Electric? Choosing a Water Heater in Hawaii

Heating water is one of the biggest energy uses in a typical home, and with Hawaii's electricity prices that matters more here than almost anywhere. When it's time to replace a water heater, it's worth a few minutes to compare the options.

Standard electric tank

The lowest up-front cost and the simplest install. The trade-off is higher operating cost on island electricity. It can still make sense for small households, condos with limited space, or as a quick replacement when a tank fails.

Solar water heaters

Hawaii's sunshine makes solar water heating a strong fit for many single-family homes. Up-front cost is higher, but the sun does much of the work, and most systems include an electric backup element for cloudy stretches. Existing systems need occasional service on pumps, controllers and backup elements.

Heat pump water heaters

Heat pump units pull heat from the surrounding air, which suits a warm climate well. They use much less electricity than a standard tank and don't need roof space, making them a good option where solar isn't practical.

Tankless

Tankless units heat on demand and save space. Electric tankless models can need significant electrical capacity, so they aren't a fit for every home — get your electrical service checked before choosing one.

Repair or replace?

A failed element or thermostat on a healthy tank is a reasonable repair. A tank leaking from the bottom is finished. If your unit is older and needs a major part, replacing it with a more efficient model often pays off.

Check for rebates

Hawaii Energy has offered rebates on qualifying solar and heat pump water heaters. Programs change, so check their current offers before you buy. Then tell us about your home through the form below and a local pro will help you pick the right system.