The number people forget: charging losses
Energy is lost twice on its way into a battery — in the charger converting AC to DC, and in the cells themselves as heat. Small scooter bricks run 85–92% efficient; car AC charging lands in the same band; DC fast charging is a little better at the vehicle but the station takes its own cut.
Left out, that gap understates your bill by 10–15%. A 500 Wh scooter charge at 90% efficiency actually pulls 556 Wh from the wall. It sounds trivial at scooter scale — and it is, a couple of cents — but on a 70 kWh car charged twice a week it is real money over a year.
Tariffs matter more than efficiency
The spread between tariffs dwarfs every other variable. Overnight EV tariffs in the UK can be a quarter of the day rate; time-of-use plans in California and Australia have similar gaps. Shifting all your charging to the cheap window is usually worth more than any efficiency tweak you could make to the vehicle.
Public charging is a different market. DC fast charging typically costs two to four times the home rate, and some networks add session or idle fees. If you rely on public charging, run the numbers with the public price — the comparison with petrol gets much closer, and occasionally goes the wrong way.
Scooter economics in perspective
A 500 Wh commuter scooter used for a 20 km round trip needs roughly one charge a day. At 30 cents per kWh that is about 17 cents a day, or 45 dollars a year for a 260-day commuting year. The electricity is close to a rounding error.
What actually costs money is the battery. A replacement pack every three to four years, at 200–500 dollars, works out to 5–12 dollars a month — an order of magnitude more than the charging. Anything that extends pack life is worth more than anything that saves energy, which is a useful frame when you are tempted by a fast charger.
What a charge actually costs
Worked examples at a mid-range 0.30 per kWh tariff, with 90% charging efficiency applied. The striking thing about micromobility is how small these numbers are — the electricity is close to a rounding error next to the cost of the battery itself.
| Vehicle | Pack | From the wall | Per charge | Per 100 km |
|---|---|---|---|---|
| Xiaomi M365 scooter | 280 Wh | 0.31 kWh | 0.09 | 0.53 |
| Ninebot Max G30 | 551 Wh | 0.61 kWh | 0.18 | 0.60 |
| Long-range scooter | 1200 Wh | 1.33 kWh | 0.40 | 0.87 |
| City e-bike | 500 Wh | 0.56 kWh | 0.17 | 0.40 |
| Compact electric car | 40 kWh | 44.4 kWh | 13.33 | 5.00 |
| Mid-size electric car | 60 kWh | 66.7 kWh | 20.00 | 6.00 |
The tariff matters more than the vehicle
The spread between electricity tariffs dwarfs every other variable in this calculation. Overnight EV tariffs can be a quarter of the standard day rate, and public DC charging routinely costs two to four times the home rate. Shifting your charging into a cheap window is worth more than any efficiency improvement available to you.
Which leads to the real cost of scooter ownership. A 500 Wh commuter charged daily costs roughly 45 a year in electricity. A replacement pack every three to four years at 200–500 works out at 5–12 a month — an order of magnitude more. Anything that extends pack life is worth more than anything that saves energy, which is a useful frame next time a fast charger tempts you. The battery health calculator is the tool that tracks that side of the ledger.
Questions riders actually ask
How much does it cost to charge an electric scooter?
Multiply pack watt-hours by your electricity price and divide by 1000, then add about 10% for losses. A 500 Wh pack at 30 cents per kWh costs roughly 17 cents for a full charge — under 5 dollars a month for daily commuting.
How much does it cost to charge an EV at home?
A 60 kWh car charged from 20% to 80% takes about 40 kWh of energy, or 44 kWh from the meter after losses. At 30 cents per kWh that is roughly 13 dollars for around 250–300 km of range — typically a third to a quarter of what petrol would cost.
Should I use cost per kWh or cost per km to compare?
Cost per 100 km is the only fair comparison against a petrol car, because it folds in how efficient the vehicle is. Two EVs on the same tariff can differ by 40% per kilometre if one uses 14 kWh/100 km and the other 20 kWh/100 km.
Does cold weather increase charging cost?
Yes, in two ways. Cabin heating and battery preconditioning draw energy that never moves the vehicle, and cold cells accept charge less efficiently. Winter running costs are commonly 20–30% higher per kilometre than summer.
Are public chargers ever cheaper than home?
Occasionally — some workplaces, hotels and retail parks offer free or subsidised charging, and a few networks price off-peak AC below domestic day rates. As a rule, though, home overnight charging is the cheapest energy you can buy for a vehicle.