You will not see much of an increase in your electricity bills if you have an electric gate installed. While operating, gates use roughly 700W for 20-30 seconds in each direction, and 100W when in standby mode. Rounded up, the average cost of electricity per kwh is 15p, which, for the average household, will amount to around £15 a year to run. The price will vary depending on the frequency of use, but it should not deviate too much from this average.