Electric running cost

Oben Rorr EZ Sigma running cost, range and charging

Work out what it costs to charge and ride the Rorr EZ Sigma every month, and how that compares with a petrol bike. Change any number to match how you ride.

Battery3.4 kWh
Claimed range140 km
Charging 0–80%1 hr 30 min
Top speed95 km/h
Ex-showroom₹1.1 lakh – ₹1.2 lakh

How you ride

Distance a day 1 to 300 km

Riding days a month 1 to 31

Range you expect per charge 20 to 500 km

Claimed ranges are measured in test conditions. Traffic, speed, load and weather usually bring it down, so use your own figure if you know it.

Charging

Electricity price from your bill

Home tariffs differ by state and slab. ₹8 is only a starting example.

Charging loss 0% to 30%

Some electricity is lost as heat in the charger. 10% is our assumption, not a manufacturer figure.

Compare with petrol

Petrol bike

Uses the claimed mileage. Pre-selected: the petrol motorcycle closest in price.

Petrol price today, in your city

₹100 is a round example. We don't track daily fuel prices.

Charging cost a month ₹168 ₹0.22 per km over 780 km

You save ₹1,527 a month compared with the petrol bike.

Energy cost over 5 years

Electric: ₹10,080
Petrol: ₹1,01,760

Cost of a full charge: ₹30
Full charges a month: 5.6
Petrol cost a month: ₹1,696
Petrol cost per km: ₹2.17
Saving a year: ₹18,324
Extra price of the electric bike starting ex-showroom: −₹3,842
Fuel savings cover the extra price in: Costs no more to buy

Battery and charging

Battery capacity: 3.4 kWh
Claimed range: 140 km
Range in eco mode: 110 km
Range in normal mode: 90 km
Range in sport mode: 70 km
Charging time 0–80%: 1 hr 30 min
Charging time 0–100%: 5 hr
Charging at home: Yes
Battery warranty: 8 Years or 80,000 Km

Figures are the manufacturer's claims as listed in our specifications.

Full Rorr EZ Sigma specifications

How this is worked out

Cost of a charge = battery kWh ÷ (1 − charging loss) × price per kWh

Cost per km = cost of a charge ÷ range per charge

The petrol figure is the petrol price divided by the claimed mileage. These are energy costs only. They leave out insurance, servicing, tyres, a possible battery replacement, any purchase subsidy, and the higher price of public fast charging.

Work out the EMI on ₹1.1 lakh