Hot tub guides

Straight-talking UK guides to what a hot tub really costs to run, how to cut those costs, and how a retrofit heat pump and solar kit changes the numbers — with honest figures and no invented savings.

• How much does a hot tub cost to run? (UK) — what drives the bill, and the real 2026 figures.
• Hot tub winter running costs — why winter costs 2–3× more, across all the big brands.
• The cheapest way to heat a hot tub — ranked from free fixes to a heat pump.
• Cheapest hot tub to run in the UK (2026) — foam vs inflatable, ranked by insulation.
• Hot tub heat pump: how it works & is it worth it — the standalone explainer.
• Hot tub heat pump vs electric heater — an honest COP comparison, pros and cons.
• Solar hot tub kit: how it works — PV, battery and heat pump, and what solar can and can't do.
• Can you run a hot tub on solar power? — the honest yes-and-no.

Want a figure for your own tub and tariff? Try the savings calculator.