Very high kwh usage for 1 person?

dehumidifiers can be big users, what model have you, is there a power reading on the back , e.g 200W

I don't do any crazy cooking. I cook in batches, and then use the hob/oven to reheat things, so maybe 15min on the days I don't cook.

I wasn't suggesting you do crazy cooking, but a faulty element in the oven or the hob could be consuming way more than energy than it would need.

And in my fathers house bills went up when they should have gone down, and we eventually found out it was the fridge. Only found that out when moving out, everything switched off, and the meter kept on turning. My sister went around one by one turning everything that was staying off.

How old is the oven, fridge, freezer etc?

figure out first if it's your meter & if you're getting billed for the correct meter.

i wouldn't be surprised if it's not actually your meter, if you weren't there for September it doesn't really make sense, unless it's a faulty fridge. either way 400kwh for 1 person apartment is crazy in the warmer months

I don't think you need to get a smart meter plan to see your smart meter usage. As the user SteelyDanJalapeno mentions above, you can create an account on esbnetworks.ie using your MPRN number and this should allow you to see your smart meter usage.

Also, if you are thinking of changing to a smart meter plan, use a comparison website such as bonkers.ie to find the best electricity rates available.

I’d go with turning everything off for an hour or so and check to see if your usage is zero.

If you see units being used then the meter and MPRN were misassigned or something else is running off your meter.

Given what you describe your families usage seems exceptionally low are you sure you are comparing correctly e.g. it’s two months usage for the family home and they are reading the bill correctly.

We used approx 1850kwh in November and December of which approx 600kwh was heating and hot water from the heat pump.

Not a chance. You’re using nothing. Sitting in a freezing apartment and using a dehumidifier for an hour or two on washing day is no life. I’d be surprised if it’s any of the appliances either. Our cooker etc is about 12 or 13 years old. Washing machine not new either, nor the dishwasher.
We have an electric shower going a couple of times a day too.
If you haven’t already ( I think you did) check the MPRN on your bill and on the meter downstairs. I wonder if you’re paying for two apartments. Maybe see if your MPRN is on another meter too.
I hope you get it sorted soon.

4 bed house, gas heating and oven, electric everything else, 3 people living all the time, 2 work from home.

14 Nov - 14 Jan 620Kwh, €200.

Heavy usage, people staying over, EL shower few times a day, Air fryer used a lot, Kettle never off, large USA fridge freezer and chest freezer. Never use the immersion, Gas heating and hot water.

Do you know your EL Rate?? I'm 22.6c.

Standing charge? I'm €18 a month.

Your bills are way off.

An immersion heater is really efficient (as in there are almost no losses), but that doesn’t mean it’s cost effective. Electricity is about 3x the cost of kerosene when you consider its gross calorific value. (Unless you are utilising favourable off-peak tariffs)

A modern oil or gas boiler is 90+% efficient. There will be distribution losses, but much of this is into the thermal envelope of the house.

If you want to heat a cylinder of hot water, an oil or gas boiler will do it for less than half the cost of an electric immersion heater in most cases.