> In Australia we use an off-peak tariff system for water heating. The water
> heater is connected back to a separate switchboard meter with a tone
> controlled switch (audio PLC). The power company controls the switching of
> the water heaters and offers a greatly reduced rate. It's been around for
> long as I can remember.
The local power company here in So Cal has the same type of duel meter setup
using a timer for control. During "Peak Hours" the charge is more than the
standard rate and during "Off Peak Hours" it's considerably less than the
standard rate. This is a voluntary type of thing and usually saves the home
owner with a pool filter and all electric house a fair amount on his
electric bill. Although air conditioning in the afternoon could be a fairly
large expense with a higher than standard rate, therefor I don't see very
many homeowners opting for this.
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