When thinking about peak versus off-peak, consider this: The power company has to build a power plant capable of providing power at high demand times. During the night, most of that capacity is not used. But you can"t just turn down the power plant that easily. So they use a variety of stragegies. Coal still provides most of the base load electricity in the US. For periods when extra capacity is required (peaks), they can supplement with natural gas - much quicker response than coal (this is sometimes called needle peaking). Or buying extra power from other areas of the country that have excesses. And they are always trying to save fuel cost, so they are constantly arbitraging the prices (looking for the best deal) between coal, gas, oil, hydro, nuclear) to fulfill their supply. This often occurs on an hour to hour basis. Hydro is nice if you have it, you can quickly reduce or increase the water through the turbines. Pump storage, as someone pointed out, takes advantage of using the excess electricity during the night to pump water back into a reservoir so it can be used to generate power during the day. Electric vehicle charging during the night can take advantage of the off peak excess power. Ideally, this extra revenue during the night should mean lower overall costs for electricity - but don"t hold your breath.
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Today's Featured Article - A Cautionary Tale - by Ian Minshull. In the early 1950s my father bought an Allis Chalmers B and I used it for all the row crop work with the mangolds and potatoes, rolling and the haymaking on our farm. The farm and the Allis were sold and I have spent a lifetime working on farms throughout the country. I promised myself that one day I would own an Allis. That time event
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