Just moved to flat with night storage heaters and economy 7 tarriff,
Being highly nocturnal, expected benefit of low tarriff for whole house, as well as heaters, in the very late hours.
Tests show that flat is wired so that everything but the heaters stays on high tarriff always. Big disappointment and different from what most other people seem to have.
How can I change this? Presumably it could be done without messing with the meterbox (external), by installing a big relay at the consumer unit, so rest-of-house is switched to low-tarriff feed when it comes live. Is this practical, or is there a better solution ?