We don’t know what precise model of meter you have installed, but most multi-rate meters will only have one tariff switching table, giving the times when usage is recorded on the two registers peak and offpeak. This means that all consumption - by storage heaters, tumble dryers or EV chargers, for example - recorded during an offpeak period will be billed at the offpeak rate.
The meter’s registers record energy being consumed on its way in (through port 1), so to speak, and aren’t interested in where it goes on its way out (via constant port 4 or switched port 5).
Please check precisely what time the tariff changes from peak to offpeak and vice versa. This won’t be at the advertised times, but a few (up to 30) minutes later. It can get expensive if you assume that running the tumble dryer from 13:00 will save a bit of money if the offpeak rate doesn’t in fact start until 13:15. Please post back if this doesn’t make sense!
Noel | I have no official status; I'm just a volunteer who comes here to help other customers. My gear: Aclara SGM 1416-B Electricity-only E7 meter; Chameleon IHD3-PPMID-AAA | It may look as if I know what I’m talking about, but don’t let that fool you. |
