Last seen: Sep 16, 2025
Solar thermal panels are at least 80% efficient,whereas the max. possible efficiency from a (single sided) silicon PV panel is 23%. I have 30 vacuum...
I've just addressed this issue here in the topic DIY solar upgrade. I've spoken with the senior NGED engineer who issues their operational specifica...
Yes, the meter is installed by your Energy Supplier, for which they have to meet Ofgem targets, but also benefit from a subsidy. Here's a diagram sh...
I have attempted to address the subject of phase-imbalance by using analogies rather than referencing some of the excellent academic papers on the sub...
I wonder if this diagram provides an idea of what happens when the demands on a substation are unbalanced across the 3 phases: I'm starting with the...
Here's the classic 3-phase diagram of voltage against time, which will make better sense of Derek's explanations. I've just drawn this from scra...
... which it doesn't, because the Neutral is rarely fused. Instead, the Neutral wire gets hot, which eventually creates thermal breakdown of the ins...
Yes... and most of that will be down to ignorance. When I see an outage pop up on the NGED Regional alert page, I tend to check where it actually is...
And you're very unlikely to! There are 230,000 ground-mounted local substation transformers and a further 320,000 pole-mounted. Only a few hundred...
To underline those comments from @derek-m 19kW equates to 80A, which is the size of Service Fuse being deployed by DNOs when they get called to site f...
I think both @david999 and @bretix are missing something which I've found an essential part of my route to understanding how this green technology pro...
Yes, Canadian Solar is ok @david999 How do you feel about the short-circuit current of those panels being slightly greater than the 13.5A maximum ra...
Latest Posts
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RE: Big Changes Coming to Our Heat Pump System
@editor your engineer's attitude is truly horrifying. ...
By GrahamF , 9 hours ago
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@cliffhanger - seriously though, I have no idea. What I...
By cathodeRay , 11 hours ago
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RE: How to choose Towel Rails for an ASHP
@rob-nezard yes absolutely. Here is the link and a pho...
By GrahamF , 11 hours ago
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@mixergy Thanks for the update, I would appreciate some...
By bontwoody , 13 hours ago
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RE: Is Your Broadband Router the Weak Link in Your High-Tech Home?
Unfortunately I'm not that well connected 😂 ...
By Scalextrix , 16 hours ago
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RE: A Customer's Lessons Learnt from a Heat Pump Installation in a Large House
It is interesting to see what our new Grant Aerona 290 ...
By GrahamF , 19 hours ago
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RE: Testing new controls/monitoring for Midea Clone ASHP
I've never physically seen it, but I seem to recall som...
By cathodeRay , 19 hours ago
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@jamespa Ours is a Daikin EDLA03 8 kW and the Delta T =...
By Toodles , 20 hours ago
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RE: Midea ASHP – how to set weather compensation
I noticed that too and thought the same thing, but then...
By cathodeRay , 2 days ago
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RE: Ya can’t win! It is S*d’s Law!
@old_scientist If IOF is still running next late spring...
By Toodles , 2 days ago
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RE: Electricity price predictions
Those of you on Agile will do well tomorrow; there are ...
By Toodles , 2 days ago
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RE: Who’s Caved and Switched the Heating On Already?
We've been running our Ecodan system, installed in June...
By Sheriff Fatman , 2 days ago
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Ok. Two schools of thought. The first is to run the ...
By JamesPa , 2 days ago
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@drei Willing as I am to help, I don't think I'm yet ...
By JamesPa , 2 days ago
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Selling 5 year old ASHP & Gas Combi Boiler - £590
Selling a 5-year-old Daikin Altherma Hybrid Air Source ...
By Paul G , 3 days ago
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RE: Help me keep the faith with my air source heat pump installation
Er true, it should have read l/hr!
By JamesPa , 3 days ago
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RE: Is a Valliant Inline 6kW heater a BUS buster?
Much of that is true in principle, but its not likely t...
By JamesPa , 4 days ago
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RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
@dgclimatecontrol I attach the responses from 2 potenti...
By pash44pump , 5 days ago
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RE: Buffers, hot water and cooling
@dgclimatecontrol thanks, that's helpful.
By JamesPa , 5 days ago
