Fuel cost avoided
Hours replaced × operating days × engine idle fuel use × diesel price.
LESS IDLING. MORE POSSIBILITY.
POLAR FOX
ROI CALCULATOR.
See what reducing engine idling could mean for your operating costs. Adjust the numbers to explore savings with a Polar Fox electric system.
BUILD YOUR SAVINGS ESTIMATECLEAR ASSUMPTIONS. USEFUL NUMBERS.
HOW YOUR ESTIMATE WORKS.
Annual net savings
Fuel cost avoided + verified additional savings − charging, maintenance, and heater fuel costs.
Payback & five-year savings
Payback = upfront investment ÷ annual net savings × 12. Five-year net savings = five years of net savings − upfront investment.
Assumes the same costs and usage every year. Excludes financing, interest, inflation, discounting, resale value, battery replacement, and unentered expenses. Actual results depend on runtime, weather, battery condition, charging availability, vehicle setup, and how much idling is actually replaced. Fuel avoided describes displaced engine idling; it does not deduct heater or charging fuel in gallons. Those costs are entered separately.