Richard Frost wrote: ↑
Mon Sep 27 2021 11:18am
I am not aware that anyone has suggested they are bad. Just unnecessary, The only advantage as far as I can see is to the supplier, as much as the advertising might indicate otherwise.
I think they're more of an enabling technology. Wholesale prices vary every half hour (they're set the day before). If my electric car takes 4 hours to charge, the optimum time is to charge it in the parts of the night when prices are lowest, rather than immediately I arrive home from work. In theory, a smart meter could manage this.
Likewise, if/when we have better battery technology, we could charge the batteries overnight when electricity is cheapest and then use the energy during the day.
Agree, though, that the benefits to the consumer right now are pretty small. If you're motivated by these things, you'll already understand what drives your bills, and have invested in efficient appliances and other things to reduce consumption.