Question: how much power do you need to run a hot tub?
Answer: How Much Electricity Does a Hot Tub Use Per Month? The primary energy hog in a hot tub is the heater, which will draw around 1,500 watts or 6,000 watts, depending on whether it's a 120-volt heater or a 240-volt heater. There's also the water pump to consider, which usually draws about 1,500 watts.