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Never mind the OAT…

 
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Solar Photovoltaic (PV)
Last Post by Toodles 4 months ago
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
Famed Member Moderator
Joined: 4 years ago
Posts: 1759
24/12/2025 11:37 am  

Posted by: @toodles
↑

@jamespa The decision to ‘Go Green’ in our case certainly contained a large element of ‘social responsibility’ - not so much for this or next year but for the whole of humanity for centuries to come.

I’m sure there are people who do, indeed, care enough about the environment to back their convictions financially - my family are just such examples. However, I strongly suspect the membership of this forum is a far from representative sample. 


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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Toodles
 Toodles
(@toodles)
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Posts: 2711
Topic starter 24/12/2025 11:40 am  

@majordennisbloodnok Sadly, I feel that is so. Toodles.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
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TechnoGeek
 TechnoGeek
(@technogeek)
Estimable Member Member
Joined: 3 years ago
Posts: 174
24/12/2025 11:50 am  

@toodles 

Posted by: @toodles
↑

So, am I an odd-ball in this regard, or have any other readers found themselves adopting a similar attitude please? Warm Regards, Toodles.

Now that I have had my solar array and batteries installed to my own specifications, I am starting to think your way now. My main driver was to shield ourselves as much as possible from the ever increasing electricity cost and hopefully reduce the impact on our pension savings later on down the line.

I certainly think the solar / batteries was the missing link in my renewable's journey. I have now been more happy switching on and leaving on my heat pump which has also given me the opportunity for some fine tuning, however the Missus is now saying its too warm! You cannot win! 😀

Posted by: @toodles
↑

When checking the Met Office website to see what weather might be chucked at us in the next few days, my first thought is to ‘how much solar power might I expect?’ It never occurs to me to look at the expected temperature prediction!

I have recently signed up to Solcast for a free account and currently evaluating its accuracy against what I am actually generating. I am currently tweaking the loss factor to get the irradiance model output aligned with my system but I have been getting reasonably accurate results recently.

Regards


5 Bedroom House in Cambridgeshire, double glazing, 300mm loft insulation and cavity wall insulation
Design temperature 21C @ OAT -2C = 10.2Kw heat loss, deltaT = 8 degrees
Bivalent system containing:
12Kw Samsung High Temperature Quiet (Gen 6) heat pump
26Kw Grant Blue Flame Oil Boiler
4.1Kw Solar Panel Array
34Kwh GivEnergy Stackable Battery System


   
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
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Joined: 4 years ago
Posts: 1759
24/12/2025 11:55 am  

Posted by: @toodles
↑

@majordennisbloodnok Sadly, I feel that is so. Toodles.

Actually I wasn’t making any comments about environmental issues within public opinion. My point was more prosaic; given heat pumps are recognised as more environmentally friendly, asking the environmental opinions of people who’ve already installed one is bound to skew the results. However, we can’t extrapolate that to infer anything either way about non heat pump owners.

 


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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JamesPa
 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 4714
24/12/2025 12:31 pm  

Posted by: @majordennisbloodnok
↑

Posted by: @toodles
↑

 

 

The decision to ‘Go Green’ in our case certainly contained a large element of ‘social responsibility’ - not so much for this or next year but for the whole of humanity for centuries to come.

I’m sure there are people who do, indeed, care enough about the environment to back their convictions financially - my family are just such examples. However, I strongly suspect the membership of this forum is a far from representative sample. 

Which is one reason why I now talk about the economic security argument for renewables.  There are a group of people, who may not environmentally tuned in, but who nevertheless value the concept that the UK should not be dependent on hostile states. Its probably a fairly small group, but it does exist. 

Without renewables, we cannot avoid ever increasing dependence on hostile states, and without energy independence there can be no sovereignty.  We need to take back control, to borrow an ugly phrase.

 


This post was modified 4 months ago by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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Toodles
 Toodles
(@toodles)
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Joined: 4 years ago
Posts: 2711
Topic starter 24/12/2025 3:03 pm  

@majordennisbloodnok Education, Education, Education…


Toodles, heats his home with cold draughts and cooks food with magnets.


   
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Morgan
 Morgan
(@morgan)
Noble Member Member
Joined: 5 years ago
Posts: 698
25/12/2025 10:00 am  

@toodles 🎼🎼 leave those kids alone 🎼🎼


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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Toodles
 Toodles
(@toodles)
Famed Member Contributor
Joined: 4 years ago
Posts: 2711
Topic starter 25/12/2025 3:28 pm  

@morgan They are unsupervised these days, can’t get the stave.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
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