Guides

Calculators and information for reducing household electricity costs.

Pay less for hot water

Hot water is often the biggest part of your power bill, so we’ve looked at some simple ways to spend less on it.

Estimate what heating water costs in your home, then compare cylinder insulation, solar-timed heating and hot-water heat pumps—including rough savings and payback.

Are solar panels worth it?

Thinking about solar? See how system size, location, electricity plan and using more solar power at home can change your annual bill.

Compare rough installation costs and payback to get a better idea of whether solar could work for you.