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Last seen: Apr 14, 2026
Best performance occurs with PV string near inverter nominal input voltage (360V). So panels should be selected to not exceed max inverter MPPT short ...
If it's only a few days a year, I'd recommend a second hand mobile air conditioning unit, those with caster wheels, can be had for 150€ for 3kW coolin...
Cooling a slab works fine, I tried back in the day with the old ground source heat pump. I did it passively, without running the heat pump, since the ...
Yes it's a shame the manufacturers make this vital information so difficult to access!
IMO "Oversizing the heat pump" is a bit of an over simplification. What really matters is what water flow rate the heat pump likes, and its modulati...
First please check (and share) the cylinder documentation. For example while searching for "Vaillant 150l cylinder" I came up with this VIH RW 150/5 C...
Of course. Compare: When you lease a car, you don't own it. The leaser foots the capital expense (the car) and according to the contract, is respo...
Flow and return in dark blue, Outside temp in yellow, Indoors temp in light blue (living room). Indoors temp wiggles between 19-20°C. Underfloor h...
There is a trend these days of manufacturers attempting to screw over customers with mandatory cloud subscriptions. One hilarious example is BMW's a...
No idea if it works though Good practice is never buy anything "smart" or "connected" without first checking it can work with home assistant in pure...
With enough PV and fudging definitions to mean COP = heat output / grid input it's doable
EU Type 2 connector uses SAE J1772 signaling which has no means for the car to communicate its state of charge, so yeah, the only way to implement "ch...
Latest Posts
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RE: Air-to-air heat pumps - best models and installers
@ashp-bobba, do I remember correctly that you install A...
By Mars , 4 hours ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
There isn’t as far as I know, @djh, but you’re welcome ...
By Majordennisbloodnok , 8 hours ago
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RE: Can anyone explain the following behaviour with a Grant Aerona 3 R30 / Smart Controller?
Final Update. Yesterday, I was going through the moti...
By Unsure , 10 hours ago
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RE: How much can an east/west solar solar system be oversized?
Best performance occurs with PV string near inverter no...
By bobflux , 10 hours ago
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RE: Forum updates, announcements & issues
Thank you Mars for all your dedication to improvements;...
By Toodles , 13 hours ago
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RE: Who do I complain to about a poor ECO4 installation, can anyone advise?
Take it one step at a time. If you can get the dhw and...
By JamesPa , 19 hours ago
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RE: Selling 2 x Kensa Shoebox 7kw GSHP (New)
Hi Jain, we’ve got an ashp so I’m afraid we won’t be yo...
By Judith , 19 hours ago
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No buffer or low loss header Grant controller in sens...
By JamesPa , 1 day ago
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RE: Are We Sleepwalking Into Another Race to the Bottom?
That's an amazing job to get all that in there! A truly...
By Batpred , 1 day ago
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RE: Anyone concerned about GivEnergy?
Thanks for your advice - I'll keep trying with the inst...
By JohnDwyer , 1 day ago
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RE: Plug and play solar. Thoughts?
I am also yet to find a case where an installation that...
By Batpred , 2 days ago
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RE: British Gas vs Octopus Energy vs Heat Geek vs EDF vs Aira vs OVO vs EON.Next vs Boxt
This is what I got from OVO. At least it was quick.. ...
By Batpred , 2 days ago
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RE: IVT greenline HT Plus E - Circulation Pump Constantly On
Welcome to the forums. Irrespective of which brand yo...
By Mars , 2 days ago
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RE: 7.5kW Heat Loss, But Quoted a 10kW Midea. No Re-Pipe, No Buffer Tank. Does This Add Up?
Oh, how I love these old scientists!I'm in with your 5 ...
By LeJamaisContent , 2 days ago
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RE: Jokes and fun posts about heat pumps and renewables
@jamespa Someone who is not easily phased I suppose.
By Toodles , 2 days ago
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@downfield Once OE had removed our gas meter and capped...
By Toodles , 3 days ago
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Living with a Low Loss Header (Or Measure For Measure, it’s All About the Pump)
I know, low loss headers (LLHs) aren’t necessarily ‘low...
By Toodles , 3 days ago
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RE: What is the main ‘dictator’ of Agile’s unit price?
After seeing umpteen negative price slots again today, ...
By ChandyKris , 3 days ago
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RE: The Reality Behind a Failed Heat Pump Installation – and an IWA Insurance Rejection
@ian-w Getting back to the problem in hand, what do yo...
By JamesPa , 3 days ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@papahuhu Generally, I leave Homely to take care of mat...
By Toodles , 3 days ago
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@judith, glad you found the story interesting. On eff...
By Mars , 4 days ago
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
The vaillant controller and app do all of that (and mor...
By JamesPa , 4 days ago
