How should I use my water tank?

[ApplePie86]

I'm old enough where I really should've sussed this out by now but I haven't!

So...we live in a 2 bed/2 bath flat. All heating is electric (smart WiFi controlled heating) and hot water is provided via a water tank. One shower is electric, the other thermostatic (off the water tank). We have a boiling water tap in kitchen.

Our bills are astronomical. Our heating hasn't been used since around March/April but (with actual readings) we are paying about £90 a month for electricity. Good tariff so that's not the issue.

The only thing I can think of is that I'm not using the water tank correctly. I have it set to heat up for 15 minutes a day (don't know why really) and when I want a bath (twice a week, no more than that) I turn on the boost for 2 hours.

Should I have the tank heating the water for 2/3 hours a day instead? Even though it will never be used that often? Am I making it work harder by only heating it twice a week?

I dont think £90 per month is that bad for an all electric house tbh. I wouldn't use the immersion heater any more than you need to. Do you have storage heaters or electric heaters?

@dementedpixie

I dont think £90 per month is that bad for an all electric house tbh. I wouldn't use the immersion heater any more than you need to. Do you have storage heaters or electric heaters?

Electric heaters but the problem is these have been fully off since about April. So £90 a month which includes no heating whatsoever...

Switch everything off. Unplug everything except the fridge or any other essential things. Unplug tv, hairdryer, the lot.

Take a meter reading.

Go to bed.

Take another meter reading in the morning and see if it looks reasonable. That will let you know if there is a problem or if you are just using a lot of power when you do have stuff on. If you do it during the day when everyone is out it could let you see if lots is being used then too. It might be that your meter is reading fast or is including electricity used by another property.

You could switch things on one by one and see what causes the units to rise most quickly.

Anything that heats or cools uses electricity. Do you use a tumble dryer? Electric cooker?