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alternative to Homely - HavenWise. Anyone used it?

Tim441 · 2024-10-08T14:39:51Z

Interesting article in the Telegraph.. includes: HavenWise for heat pumps. Has anyone heard of it.. or used it? Extract: The established brands include Homely and PassivUK, whose optimisers have been independently shown to save 20 to 30pc. The latest entrant is a start-up called HavenWise, the brainchild of Alex Nelson, a former captain in the Royal Logistic Corps with a masters degree in robotics, and backed by Carbon13, a climate technology investor. Last spring, HavenWise demonstrated its system on my heat pump during two days of near-identical weather and the result was astonishing. The combination of its optimiser and the Agile tariff worked out 60pc cheaper than a standard tariff with no optimisation. The company says it achieved similar results in longer tests with other heat pumps. On that basis, had I been using Agile and HavenWise over the previous year, my heat pump bill would have fallen from £1,194 to £478, a saving of £717. My total electricity bill (I don’t have gas) would not have come out at £2,096 – roughly in line with the average Ofgem tariff and Energy Price Guarantee over the previous year – but a third lower at £1,379. For this year, if the weather and Agile tariffs stay the same – which they won’t – and with the Ofgem cap at £1,717, I’m guessing it would be around £1,200. But these savings are at the upper end of what HavenWise would expect, cautioned Mr Nelson, because I had not previously been running the heat pump in its most efficient weather-compensation mode. As the company tests its algorithm on many more heat pumps this winter, it expects the savings to be lower. “It’s difficult to forecast precisely”, said Mr Nelson, “but we think the average savings will settle at around 50pc.” If optimisers can deliver savings of more than 30pc, it could give heat pumps a decisive advantage over gas boilers, according to Nesta, a clean energy think tank. Its modelling shows that with the current installation subsidy of £7,500, heat pumps would then undercut boilers on the total cost of ownership – including purchase, installation, maintenance and 15 years of energy bills. “If the optimiser can save 30pc, heat pumps would cost less than a boiler every month, all in”, said Andrew Sissons, deputy director of Nesta. “That makes it easier for banks to offer financing to eliminate the upfront cost for the consumer, so this could be a pivotal moment.” Those kinds of deals are already beginning to emerge. Swedish company Aira is installing heat pumps in the UK at no upfront cost. The Heat Geek installer network has launched a similar offer which includes an efficiency guarantee. Homely and PassivUK’s optimisers work through small electronic devices costing around £200 that need to be wired into the heat pump by an approved installer. HavenWise operates through the cloud and needs no extra equipment – provided the heat pump is Wi-Fi enabled – and will charge an annual subscription of £50.

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Air Source Heat Pumps (ASHPs)

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HCas

(@hcas)

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Joined: 2 years ago

Posts: 132

27/01/2025 12:49 pm

@morgan Not a dumb question! If your heat pump is internet connected, you would have access to the Samsung SmartThings app (if you have a Samsung). I see you have a Mitsubishi, so in your case you would have access to the Mitsubishi Melcloud app.

CEO and co-founder at HavenWise

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Alfapat

(@alfapat)

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27/01/2025 12:50 pm

@hcas No ,not internet connected, where can I apply for this please.

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Morgan

(@morgan)

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27/01/2025 1:56 pm

Posted by: @hcas

↑

@morgan Not a dumb question! If your heat pump is internet connected, you would have access to the Samsung SmartThings app (if you have a Samsung). I see you have a Mitsubishi, so in your case you would have access to the Mitsubishi Melcloud app.

@hcas

I do indeed have a Mitsubishi Ecodan and can access the Melcloud app. The MC app however is very limited. I take it then that Havenwise is not possible here?

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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Gary

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Posts: 350

27/01/2025 2:37 pm

@morgan Havenwise uses the data that is fed to Melcloud so it could work for you. I haven't inquired but I would expect you to need to be using the main controller or mitsubishi wireless controllers for it to work otherwise its not going to know what the internal temperature is. If you have 3rd party thermostats its not going to work

There is a month's free trial its just software so maybe worth a look.

https://www.havenwise.co.uk/

👍

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HCas

(@hcas)

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Posts: 132

27/01/2025 2:53 pm

@morgan : Gary is right on Melcloud. If you have access to the Melcloud app, it just means your heat pump is internet connected, which allows Havenwise to send and receive signals to the heat pump. So Havenwise will work.

@gary If the Mitsubishi controller / thermostat is located appropriately, we use this temperature as reference. If not, we send a wireless temperature sensor (no extra cost!). And Havenwise still works with 3rd party thermostats if you use the 3rd party stats as temperature limiters (which is general best practice for heat pumps anyways!).

CEO and co-founder at HavenWise

👍

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Morgan

(@morgan)

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27/01/2025 5:22 pm

@hcas

I have a Mitsubishi wireless controller/thermostat and access to Melcloud.

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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Alfapat

(@alfapat)

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Joined: 3 years ago

Posts: 187

27/01/2025 5:53 pm

@hcas

How can I set about starting this Havenwise , I filled out a form with the company , perhaps that might work?

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HCas

(@hcas)

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30/01/2025 11:22 am

Tackling the questions one by one:

@gary is now connected to Havenwise, welcome!

@alfapat Thank you for reaching out via email. I have answered there. For the benefit of the forum, if the heat pump is internet connected, you can get started with Havenwise with just a few clicks on your phone / computer. The prerequisite is that the heat pump is internet connected.

@morgan If you want to connect it to Havenwise, you can go to our website ( https://www.havenwise.co.uk/) and link your heat pump with a few clicks. Any questions, let me know!

CEO and co-founder at HavenWise

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Morgan

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30/01/2025 12:02 pm

@hcas

But first I have to remove any controls I've set up here such as scheduled setbacks and temp variations?

Also what mode do I set the ASHP to work with Havenwise? Presently I run on a weather comp and occasionally auto-adapt mode.

Do I need to remove the Legionella schedule in order not to clash with Havenwise control?

Any other settings I need to remove before handing over control to Havenwise?

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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Gary

(@gary)

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Posts: 350

30/01/2025 12:19 pm

@morgan just go to the login to the website hcas has provided, that just gets the data across to them they won't take control until you request it.

👍

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DavidAlgarve

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Posts: 235

30/01/2025 1:18 pm

Is Havenwise limited to UK? I might be interested for my Mitsubishi here in the Algarve

342sq m "Upside down" house in Algarve. Portugal
Mitsubishi PUHZ-120YUK 12kW ASHP
12 Solar Panels Growatt Inverter
2 x Growatt 7.5kW Batteries
Fronius EV Charger
Kia e- Niro 64kW

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