"Cynic" wrote in message
news:4cff7a2d.6743843@localhost...

The best use of Economy 7 would probably be to use it to charge up
batteries overnight, and then use the batteries to supply power as and
when required during the day. Unfortunately, while such an
installation is perfectly possible, the capital cost would be pretty
horrendous, and I doubt you would recoup the cost in saved electric
bills over the lifetime of the installation.

It would have to be a pretty big battery, to deliver several thousand watts
over 16 hours or so. Perhaps you can convert the garage into one giant
battery.

Off-peak electricity might be best used to pump water uphill, then use that
to drive a hydro-electric unit. But there are a few problems with domestic
use (such as having a big enough hill in the garden).

--
bartc