Am I Economy 7?

It varies by region @jamesb27 and tariff set by the supplier .. for example

You would need to be on a tariff that supplies energy at peak and off peak rates

The ‘straight’ answer is ..

If your tariff is not something like Economy 7 then the price remains the same through the day. 
You can see what your being charged on your plan page via your account

Hey @jamesb27,

I can see BPLightlog has given some helpful advice here. This topic may be helpful:

Rolling means the plan continues until you switch, to another plan or to another supplier. Variable means that the rates can go up or down, but you’ll always be given notice of any change. These terms are to distinguish the plan from fixed-rate tariffs, which as the name suggests have the same rates until the plan comes to an end, usually after one or two years.

If you don’t see separate Peak and Offpeak unit rates, the single Unit rate applies to all your usage. There are no cheap periods. To take advantage of a plan with different rates for peak and offpeak usage, you have to have a meter that’s capable of handing them. The chances are that you don’t have a meter like this. If you showed us a photo of your meter, we’d be able to tell you for certain.

We can’t change meters from single rate to Economy 7 I’m afraid @jamesb27, so if you have a single rate meter we won’t be able to offer an Economy 7 plan.