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Homely vs TaDo for a heat pump. Does Homely only optimise twice per day?

ANels · 2024-03-19T21:41:33Z

Hello! I'm thinking of getting an air-to-water heat pump (probably a Daikin) and I'm deciding on controls since I've heard Daikin's aren't the best. I've heard some good things about Homely and watched the Heat Geek video where one of their guys was interviewed. I'm concerned because Homely said that it connects to their servers and "optimises twice a day". Can anyone with a Homely confirm this? I'm worried what happens when my partner leaves windows/doors opening leading to the house being much colder than what Homely last did its prediction for many hours ago, leading to the flow temperature being too low. I'm also concerned about the reverse effect happening, leading to overheating. I know Homely say it considers for each 30 minute period, but what happens if conditions suddenly change and the next connection to their cloud is 10 hours away? I've read a lot of good things about Homely here, is there anyone who has had a bad experience or was more uncertain? Finally, I'm also looking at TaDo since they recently made their system compatible with heat pumps and they don't rely on cloud optimisation twice a day. Does anyone know if this latest TaDo modulates the flow temperature like a Homely would? I think I need to avoid on/off controls. I'm also keen to make use of time-of-use tariffs too if possible. Many thanks in advance! Alex

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Toodles

(@toodles)

Illustrious Member Contributor

Joined: 3 years ago

Posts: 2438

04/04/2024 6:08 pm

@anels HelloAnels, I have an LLH and from the testing I have carried out, it is fairly efficient (results published some weeks back in RHH) so am not about to rip it out! When the service engineer from Daikin carried out the first annual service, he commented that the primary pump sees ver little resistance and the whole system runs very cleanly. The last few weeks has shown a COP (via the Homely Dashboard info) of 4 - 4.8 and I think this is quite respectable especially as we run the whole house at 22.5 degrees C. 24/7. The Homely controller also controls the secondary pump and has the advantage that it stops the pump when not required unlike the Neo Air which kept it running 24/7!

The Onecta app is in my opinion of very limited use as very little information beyond OAT and consumption figures appear in the details. As Homely has taken over all functions around LWT and WC plus anticipating temperature drops and rises and can use the Agile API to monitor tariff use to best advantage, combine it with weather warnings etc., the Smart+ mode would be very useful if working straight off the grid. With a battery, this is less critical. We have been using the Smart mode now for a week and more and our setting of 22.5 degrees C. never drops below and only rises by 0.6 degrees for a short time before moderating itself again. Overall, we are very impressed with it. (Disclaimer: I paid full price and do not have any monetary or share interest in EverGreen Energy / Homely!)

Regards, Toodles.

Toodles, heats his home with cold draughts and cooks food with magnets.

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Morgan

(@morgan)

Noble Member Member

Joined: 5 years ago

Posts: 687

05/04/2024 9:11 am

@toodles

"A COP of 4 - 4.8"..............??? 😯 I struggle to get much above 2.

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

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Toodles

(@toodles)

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Joined: 3 years ago

Posts: 2438

05/04/2024 9:25 am

@morgan I am assuming that the internally derived data is reasonably accurate - but it is all I have to go by anyway. Checking this morning, the COP is 5+ but then, it isn’t the weather to tax the system very much - even for an IAT of 22.5 degrees

C.!

Toodles, heats his home with cold draughts and cooks food with magnets.

👍

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Toodles

(@toodles)

Illustrious Member Contributor

Joined: 3 years ago

Posts: 2438

05/04/2024 9:28 am

I have also been experimenting with 2.5 degrees C. setback at night as you will see in the graph, but with good insulation, the temperature doesn’t drop much anyway. Regards, Toodles.

Toodles, heats his home with cold draughts and cooks food with magnets.

👍

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