Still, we like that if you choose to re-up with FirstEnergy again at the end of your initial term, you won’t have to worry whether you’re enrolling at an expensive time of year. First, since it offers just two options, constant for years, its prices are set with the long haul in mind. Second, since the electricity grid in Pennsylvania is more taxed during winter than any other season (space heating accounts for 50 percent of household electricity consumption in PA; air conditioning just three percent), signing up in summer means prices won’t be temporarily inflated.

Technology that now allows smaller quantities of power to be generated closer to the end-users at prices not too much higher than grid-based power are undermining those economies of scale. More efficient turbines, for example, allow large power users like cement plants and petrochemical factories to come off the grid. Today the limiting factor for large companies to come off the grid often isn’t the efficiency of the power generation technology, but the lack of easy availability of fuel, such as gas or coal to power these turbines Even this problem is being solved by innovations like mini-liquefied natural gas projects.

Switching electricity supplier could shave pounds off your bills. But it’s not always about how much hard cash you could save. You might be fed up with poor customer service, you might want greater visibility of your usage through an app or you might want to choose your supplier based on their green credentials, or whether they supply a smart meter.