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jema Downsizer Moderator
Joined: 28 Oct 2004 Posts: 28227 Location: escaped from Swindon
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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jema Downsizer Moderator
Joined: 28 Oct 2004 Posts: 28227 Location: escaped from Swindon
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Slim
Joined: 05 Mar 2006 Posts: 6609 Location: New England (In the US of A)
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Slim
Joined: 05 Mar 2006 Posts: 6609 Location: New England (In the US of A)
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Mistress Rose
Joined: 21 Jul 2011 Posts: 15932
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Slim
Joined: 05 Mar 2006 Posts: 6609 Location: New England (In the US of A)
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Posted: Wed May 11, 22 9:53 am Post subject: |
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I wasn't thinking of direct solar thermal, but thermal energy as a store of pv energy.
Over here, the economics of direct solar thermal vs additional pv to power a more efficient heat pump water heater have suggested it's better to just squeeze in an extra solar panel somewhere then to go through the rigamarole of trying to plumb in solar thermal, etc. This was explained to me by my engineer cousin as he was asking me to house sit for his house that had evacuated tubes for incredibly efficient solar thermal for hot water. His system put out too much hot water to leave the house unattended in the summer, but it was already clear back then, over ten years ago that swapping to a heat pump water heater and adding another solar panel (at least with our net metering laws) was going to provide a better financial return on investment, and be more flexible (those impressive solar thermal rigs are not necessarily user friendly for the general population, panels and heat pump water heaters can largely be forgotten about).
The economics of $/watt power potential of solar panels have only further pushed this in the decade that has followed. Evacuated tubes aren't getting much cheaper, but panels sure have been, and they've much more generating potential per area than they had ten years ago.
Seems to me, folks should be pushing for net metering laws over there. Grid as battery is quite convenient except in power outages |
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Mistress Rose
Joined: 21 Jul 2011 Posts: 15932
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waerloga
Joined: 11 Sep 2011 Posts: 9
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jema Downsizer Moderator
Joined: 28 Oct 2004 Posts: 28227 Location: escaped from Swindon
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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