Electric water heaters are now being sold in Middle TN.
Electric water heatresistance was introduced in North America in 1885, and has since been used to cool the homes of thousands of Americans.
In Tennessee, the utility has been selling water heat for about four years, according to the utility.
But the utility says it can no longer keep up with demand.
The Tennessean reported that the utility recently reduced prices by $20 per kilowatt-hour, to $20.70.
But some customers say the increase is still too little.
The utility is now selling water heater kits in middle Tennessee, said Bob Brown, a spokesman for the Tennessee Gas and Electric Authority.
But Brown said the agency is working with electric suppliers to make sure the kits are safe for use.
Tens of thousands were displaced by Superstorm Sandy, according the Tennesseans.
And the utility is also struggling to meet demand from electric vehicles.
The utility says that more than 100,000 electric vehicles have been sold since the storm, and it expects to be in surplus by the end of September.