Off Peak Fallacy

Has anyone else noticed that the off peak times, eg, 12:00 till 7 am are usually the least likely time you would use hot water so most boilers would be sleeping during this time, and working overtime during the mornings and evenings when we do use hot water.
The off peak/on peak electric in our development is controlled only by the meter, and not by time switches, so the wiring from the meter is one supply that goes to two fused isolater switches, and then to the heating elements, one switches the boiler on/off - the other is a mystery? (when in the off position the boost button if pushed will glow but no hot water! when in the on position, no boost button but plenty of hot water. (confusing) , I have tried to compare this wiring with the wiring diagram supplied with the boiler ??? I am now wondering if the problems we were having with the boost button not working is because it appears to be permanantly wired!.
Merlin

there are 3 supplies to your boiler.
1.always on 240v to power the unit. needs to be always left on.
2.boost is 240 v if you need extra hot water say early evening[ controlled manually by you switching the circuit on, this controls the upper immersion heater[ this will only heat part of the store, enough to get you over the evening period, but on daytime rate.
3. ecnomy 7/10 controlling lower immersion element[ this heats the whole unit on the "off peak " cheaper tariff and will heat the unit for daytime use, all we are doing is heating the unit cheaper than daytime rate.
hope this makes sense.
mark.
www.gledhill-repair.co.uk

Thanks Mark.
I understand your explaination of the system, but on my boiler I still cannot see how the second isolator being in the off position will allow the boost to work.
Merlin