
Last seen: Aug 25, 2025
We’re reviewing the Immersun, and I came across this formula that I used to calculate the amount of energy required to heat 300 liters of water from 2...
@derek-m, how can I calculate how much water I’m heating per degree centigrade based on diverting 1kWh of solar generation? Put another way, if I ha...
@cathoderay, maybe you could arrange and condense it into an article (word count is up to you) and it could be posted on the main site as a reference ...
Is the communication via the smart meter two-ways? Obviously, the meter is sending data to the provider, but is it receiving information too? If yes, ...
@cathoderay, Well done!
This thread, quite honestly, gives me an anxiety headache when I see updates and posts 😥 @cathoderay, your perseverance, patience and dedication ha...
@derek-m, we might have to add Heat Pump Whisperer to your signature – I love that – that's quite an accolade.
@heacol, do you have any insights or thoughts to answer AF1's question?
Can't comment on the brands you've mentioned – we had a SolarEdge inverter fitted with our PV array and it's been brilliant. Going on five years now a...
We interviewed Malcolm Farrow from OFTEC to find out more about OFTEC's heat pump design and installation training, and we also got an update on the H...
@derek-m, we've switched to an Immersun this week – it's a terrific piece of kit. Well designed. Easy to install. And works ridiculously well.
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RE: Rodents! A word of warning for heat pump owners
@tim441 Or as they didn’t quite say in the space travel...
By Toodles , 3 hours ago
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RE: Mitsu Wireless Controller and MelCloud
Update: I have found that the contractor had changed on...
By DavidAlgarve , 14 hours ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
@editor Hi Mars, We have just installed a Grant Aerona...
By GrahamF , 15 hours ago
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RE: Sanity check please. Battery storage and inverter sizing.
There are MCS guidelines about how close to the edge/ri...
By Old_Scientist , 18 hours ago
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RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff
I estimated our usage on the following basis. The mos...
By Old_Scientist , 19 hours ago
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RE: Why so many sigenergi installer recommendations?
It’s a really simple answer, GivEnergy. Installers ...
By SAEnergy , 23 hours ago
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@editor Something changed in this last 12 months, they ...
By ASHP-BOBBA , 2 days ago
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RE: Ecodan & MelCloud scheduling
I put the above question to Mitsu UK at the sme time as...
By DavidAlgarve , 2 days ago
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Thanks for the heat geek info. I've fitted my own heat ...
By bontwoody , 3 days ago
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RE: Does anyone have experience of a smart water meter?
Just to give a sense of scale, I've used the CCW water ...
By Majordennisbloodnok , 3 days ago
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RE: Powerwall 3 or Myenergi or something else?
We have a Tesla Powerwall 3, recently installed, so I m...
By Old_Scientist , 4 days ago
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RE: Mitsubishi PAR-WT60R-E Wireless Controller installation
@morgan They have been paired once but it was thought b...
By DavidAlgarve , 5 days ago
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RE: Isolating the system for a planned power cut
A great many ground-mounted local substation transforme...
By Transparent , 5 days ago
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RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
Having bit the bullet and paid £250 for a service, our ...
By Old_Scientist , 6 days ago
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New heat pump heating system underperforming in Italy... Advice needed!
hi all, first post! I've just renovated a house in sout...
By robinlawrie , 6 days ago
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RE: Anyone still weathering it out with Agile?
I went to Agile when I had solar installed July last ye...
By NJT , 7 days ago
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RE: Say hello and introduce yourself
Whilst you're busy installing services (pipes and wires...
By Transparent , 1 week ago
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
@editor I know it was formally announced at Ish the oth...
By PatrickVito , 1 week ago
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@moman0311 welcome to the forums. I've received your em...
By Mars , 1 week ago
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RE: Thermostat for Ideal Logic Air with 3 zone support
No harm at all in plumbing it as 3 zones, I would have ...
By JamesPa , 1 week ago