BOOKMARK THIS PAGE SEND TO A COLLEAGUE ENQUIRE NOW
Security code

How to calculate an electric motor's operating cost

When deciding on an electric motor supplier, it’s easy to focus on the purchase price. However, the up-front payment is a drop in the ocean compared to the motor’s electricity demand over its 10-15 years’ service.

So how do you go about calculating a motor’s operating cost? We’ve put together a straightforward guide to help, using as an example a 37 kW IE1 motor with 90% efficiency that runs on average eight hours per day, five days per week.

1. Take the power of your motor and divide it by its efficiency for the input required:

37 kW / 90% = 41 kW

2. Calculate how many hours your motor runs for per year:

8 hours per day x 5 days per week x 52 weeks = 2,080 hours per year

3. Work out the annual energy usage by multiplying the input power by annual running time:

41 x 2,080 = 85,280 kWh hours per year

4. Finally, multiply the annual energy usage by the rate of electricity (currently around 10 pence per kWh for businesses):

85,280 kWh x 10p = £8,528 annual cost

Assuming your electric motor has a service life of 15 years, this works out at a total operating cost of £127,920 for a machine that cost around £1,000 to buy - meaning you’re spending around 100 times the purchase price on energy. That’s before you even consider the cost of downtime and maintenance.

There’s a lot to consider, so if you’d like to get an idea of the best-value electric motor for your application in the long term, call Sales Manager Paul Scott on 01621 868138 or email paul.scott@gibbonsgroup.co.uk

Electric Motors

Comments

  • Date: 31 October 2016 km hasibullah
    thank u for advising to calculate electric motors. we can easily calculate..

Add comment

Back to Blog

SITEMAP