Subduction Zone
Veteran Member
The wind generators off our shores here are so huge that they seem like a few hundred yards off shore instead of 5 miles out. That's because they are about 150 meters high with one rotor at tdc. That's how we can see the London Array 25 miles away, after rain clears the atmosphere, the sun can light up hundreds of rotors circulating on the horizon.... amazing.
The nearest home to mine with Solar Voltaic panels has 16 on its roof, which is probably the average around here. These systems send, upload or back-charge (?) electricity in to our national grid and thus their electricity meters credit the home's account if it is giving back more than it is using. One neighbour's large system cost £18,000 to install back in 2004, so I guess that would be more expensive today. Governments have offered financial grants in order to attract householders to have them fitted, but I believe that grants and various benefits have been reduced now.
A friend of mine had solar water panels installed back in 2000, but he had many troubles with that during the summer. The system didn't seem to be able to control upper temperatures and on a couple of occasions the system burst and flooded the central part of his home. That put me off solar water heating! But solar voltaic panels are everywhere here.
Any new buildings, extensions, conversions or upgrades have to use 75mm and/or 100mm foil faced insulation panels either inside single skin or between cavity walls, and even between flooring and loft joists.
Our windows have to be fitted with double and triple glazing which reflects heat back in to the property, and argon is the gas used mostly in glazing cavities because it does not expand so much when heated by sunlight. More inert.. External glazing in these (modern) sealed units reflects sunlight away in order to keep cavity temperatures down in summer. Many years ago I installed our replacement d/g windows myself (before legislation controlled who could install such windows). I was worried about sealed units blowing in high temperatures and so fitted a tyre valve to a double glazing 300x300 d/g sample's spacer-rail, equalised pressure in the cavity and then left it out in sunlight for an hour. When I tested the internal pressure with a bike pressure gauge it read 40psi which really worried me, so I asked the manager at the sealed unit plant to lay my units flat and place a weight in the centre of the glass before sealing them. In the winter this distorts reflections but I've not had a blown sealed unit yet, not in two decades.
Oh dear......... I've slid far away from the thread, I'm afraid.
And I still haven't answered your most pertinent points and questions. I'll have to revisit and reply again to this post........
And for a potential downside on solar energy
Solar Panels Drain the Sun's Energy, Experts Say