A thermal cover is one of the cheapest ways to cut pool energy bills—it traps heat and slashes evaporation before your heater runs. This guide walks through pool energy savings with thermal cover: cover on/off, savings percent, COP-adjusted heating kWh, and annual dollars kept on the meter.
Benefits
- Models cover savings on thermal load—not pump kWh—so heating savings stay realistic.
- Pick 30–50% evaporation reduction to match bubble blankets and fitted covers.
- Shows monthly cover savings and annual total alongside heat pump vs. electric lines.
How it works
- Enter pump kW, run hours, electricity rate, and your heating method with COP.
- Set thermal cover to Yes and choose a savings % (30, 40, or 50% on heat demand).
- Compare daily cost with vs. without cover and read annual cover savings in dollars.
FAQ
How much energy does a pool thermal cover save?
Covers mainly cut evaporation heat loss—often 30–50% of thermal demand on outdoor pools. Savings apply to heating kWh, not circulation pump kWh. Example: 20 kWh/day heat demand, 40% cover savings → 8 kWh less heat needed; at COP 5 heat pump → 1.6 fewer grid kWh/day × $0.14 ≈ $0.22/day heating savings (plus similar savings at resistance COP 1).
Why does the cover not reduce pump electricity?
The pump still circulates and filters for the same hours—the blanket reduces heat leaving the water surface, not motor load. Cover savings show up in heater run time and heating kWh. That is why the calculator separates pump cost from thermal cover savings on heat demand.
What cover savings percent should I use?
Start with 40% for a well-fitted bubble cover used whenever the pool is idle. Tight automatic covers or mild climates may approach 50%; loose covers or partial use may be closer to 30%. Toggle percentages in the tool to bracket your real habit.
Technical specifications
- Heat demand with cover = heat_demand × (1 − savings_% ÷ 100).
- Heating grid kWh = adjusted_heat_demand ÷ COP.
- Cover kWh saved = (heat_without_cover − heat_with_cover) ÷ COP per day.
- Related: pool-heating-cost-calculator, heat-pump-vs-electric-pool-heater-cost-calculator.