There are so many factors that influence running costs, that it would be irresponsible
for any spa company to quote exact costs. These factors include the ambient air
temperature, quality of the spa cover etc.

A typical 1500 liter spa filtration cycle runs for 8 hours without heating, to keep the
water clean. The circulation pump draws 0.35 kW.
If you are paying $0.25 per kW then 0.35 x 8 hrs = 2.8 kW/h x $0.25 is $0.70 per day
to filter and clean.

The typical heater is 3 kW and on average will turn on 10 minutes an hour to
maintain heat. 5 min x 24 hrs = 1.2 hours x 3 kW = 7.2 kW/h x $0.25 = $0.90
So adding the $0.90 + $0.70 = $1.50 per day. Times this by 365 days and it comes
to approximately $550 per year. This is a very rough estimate as there are so many
variables such as the spas position, how much it is being used, for how long is it
being used, what is the set temperature, etc all play a part with running costs.
If you have solar added to you house, your spa can also be solar ready. You have
already paid for your solar, you may as well connect the Spa or Swim Spa to it
saving you more money.