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I have been going through this myself and I have used Heatpunk to calculate my heat loss. It is very comprehensive.

Have you seen the OT adapter below….. https://www.plugwise.com/product/nefit-opentherm-ems-converter/?lang=en

Good video here relating to a system very similar to yours.

Wiser will do most of what you want but the only devices with a screen are the room thermostats. Tado relies on the internet so if the internet is down the heating controls stop working. I use Wiser but my radiators are on a hybrid system of mainly standard TRV's and a limited number of iTRV's.

It’s not a thermostat though, it’s a temperature sensor.

I could give daily unit costs but who wants to read through 365 different daily costs. The tariff I am on changes every day, did you look at the graph that shows how the tracker tariff varies compared to the standard cap tariff? Let’s leave this part of the discussion there as you clearly aren’t...

Never mind, believe what you want.

How do you get Octo-Aid to give a figure for the previous 12 months? I can on see figures for the previous month.

How much energy have I been using? Unless you know that you can't make any comment on whether I paid too much or not. I think I will leave it there.

Electricity prices have changed with the price cap but not by a lot. The unit price i have been paying has been well below the price cap apart from one day recently. Have a look at the graph in post #158 which shows the price cap versus the tracker tariff.

I don’t understand your point or why you’re making it. My post was demonstrating that my smart meter tariff has saved me money. I don’t care what you pay, I only care what I pay. You don’t even know what my energy consumption is.

That's a much easier question to answer. I am with Octopus Energy and have been on their tracker tariff over the past 12 months. My total energy cost for the last 12 month period has been £1783, for the previous 12 months I was on the standard cap tariff the total energy bill was £2865.

It would be 48 screen shots which I am not going to do. It is what it is, believe it or not that’s your choice.

If I didn’t have proof I wouldn’t have been able to do the calculations. I have monthly figures provide by the suppliers app and I have the bills too.

I have calculated my savings since moving to a smart meter tariff 12 months ago, I have saved just over £1000 despite using slightly more energy compared to the previous 12 months.

I dont have figures that far back but comparing the last 12 months to the previous 12 months I have saved financially about 33% in electric and 43% in gas despite using slightly more kWh electric and gas.

I am based in the South and with Octopus. The smart meters, IHD and mobile app all work well. I have definitely saved money on my energy bills because of the tariff I am on due to having smart meters.

I don’t understand why you have such a mismatch of controls, no wonder it’s not working how you want.

It’s normal while the hub decides how much heat is required.

I spoke to them and the techie called me back with the answer.