Posted by: @benson

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Likewise the performance data

But does that really matter, everyone talks about CoP and SCoP, within reason it doesn't matter. I have full monitoring software (heat meter etc) it's useful for setup and some optimism. And it tells me I'm getting a CoP currently of 5.5 (running excess PV), it also shows me my daily CoP which is 2.8 today (heat pump has been off) but what really matters is cost to run and comfort.

@johnmo Though being informed that the system is running with a low COP figure might encourage some users to think about what they might be able to do to improve matters, ie., lowering their flow temperature and or reducing the room temperature perhaps?

We run our system at 22.5 degrees 24/7 for various reasons but mostly for medical needs. I realise a lower temperature would result in lower running cost but at least our Homely Dashboard offers a little ‘comfort’ when telling us that we have a COP of ~3.5 - 5.25 😉

@johnmo I cannot understand that logic I'm afraid. Our energy usage varies based on a number of factors. How cold it is outside and how much heating we need, how many times per day we use the washing machine/tumble dryer. What I want to see is how efficient my ASHP is to make sure it is performing ok. If it isn't, it would indicate to me that there is a problem. If I couldn't monitor COP what would be the alternative? Plotting a graph of how cold it is outside versus how many kW my ASHP uses, by accessing the not very user friendly Midea control panel? The COP is a far superior way of monitoring all of this rather than just keeping tabs on energy costs, and I suspect this is the reason you have full monitoring software, no? Why are you interested in it, can I ask, and why should I not be interested?

The information is literally right there as well- Homely just haven't wanted customers to see it, and I suspect a lot of installers don't really want their customers to see it either. I would take no umbrage with paying a small subscription to access advanced features, rather than what homely are currently doing I believe which is charging installers £20 per install for enhanced remote monitoring.

Posted by: @toodles

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lowering their flow temperature

Isn't that the whole point of homely - it does that function for you, and generates the correct weather compensation curve for your house and it's response curve to changing outside conditions.

Posted by: @benson

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COP is a far superior way of monitoring all of this rather than just keeping tabs on energy costs, and I suspect this is the reason you have full monitoring software, no?

Not sure it is always, it's nice to know CoP, but it's meaningless, costs are what is important - today playing the SCoP game I should have been getting a daily CoP of 5 overall, but the cost may have been £1 or more. But I got a CoP of about 3, but at zero cost.

Isn't homely all about low running cost, making use of cheap tariff - their headline is 31% cheaper, not better CoP.

Posted by: @benson

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Why are you interested in it, can I ask, and why should I not be interested?

Homely isn't available for my heat pump, so I was looking how to best understand what was going on, to replicate in very simple terms what homely and other systems do, but more importantly if I really needed to replicate. Which I don't.

So can run heat pump in two modes and switch between the two either via a thermostat or shelly relay. 2 modes are full on weather compensation or batch charging the floor (storage heater mode). Which is what I use with excess PV in heating and cooling mode.

Not saying you shouldn't be interested in what's going on, but more the point homely may not be the tool, as it's to help with customers comfort and running costs, and help installer do stuff from his office that would normally be done at your house and get call outs.