Are heat pump hot water systems worth it in Australia?

For most households, yes, if you can wear the upfront cost. Heat pumps sit at the top of the $1,000 to $5,000 supplied-and-installed band but use around a quarter of the electricity of a resistive tank, and state rebate schemes can close most of the price gap at purchase. The fuel-change plumbing and electrical work is what varies quote to quote. Tip: get the rebate paperwork confirmed in writing as part of the quote, not as an afterthought at invoice time.

Full ranges, drivers and sources: Hot Water System Replacement cost guide. See also: Plumber Rates cost, Electrician Rates cost, Air Conditioning Installation cost.