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Originally Posted by
KingOfSomewhereHot 
That makes no economic sense whatsoever... The cost of putting up a meaningful amount of solar panels (assuming you have room on a section of your roof that faces south) would be more than you would re-coup during the lifespan of those panels in the savings on your "regular" electric bill.
Now... new home construction in Hawaii is REQUIRED to put solar panels on the roof... and the electric provider is raising rates under the excuse of: "our usage has declined so that our revenue with current rates cannot support our infrastructure." .. in other words, the electric rates are rising BECAUSE the consumers are using solar.
I certainly support the use of solar energy, and if I were building a new house, I'd consider installing it. But your "I can't imagine owning a house and not putting it up..." comment is just not economically viable... certainly not when retrofitting old construction.
Quote:
Originally Posted by
KingOfSomewhereHot 
I'll buy that, Hiro...
Though my experience in Hawaii was that the electric companies greatly exaggerated the amount of "sellback" that a typical installation would generate. Most homeowners generated very little sellback... certainly not enough to recoup costs in a typical human lifespan

. (Though with NEW construction, the cost is just assumed in the cost of construction, since the panels are mandatory at that point.)
They did, however, dramatically reduce the amount of grid-electricity consumed by those houses, resulting in lower bills, and lower revenues for the electric company... hence their complaints about needing to raise rates.
So during the day, while many people are at work, the solar system was able to keep the house afloat with near-zero grid useage... but after sunset, they still needed to use the grid, but now at rates that were higher than in the "pre-solar era"... so the cost savings didn't appear as expected.
That said, I still think supplemental solar is a great idea, and I'd be likely to incorporate it in a house even where it was NOT mandatory... but I think it's misleading at best... and probably closer to "false advertising" when people are told that they'll recoup the installation costs and save money by installing it.
Fair enough. I suppose I was talking more about if and when ~I myself~ own a house. I'm a bit biased because in Australia most cities have a lot of sunlight. I know in the US it varies a lot depending on the location, but there are also many cities in the US that have great conditions for solar.
The environmental argument notwithstanding (which is why I wouldn't hesitate to use solar if and when I can afford my own place), the economic debate is valid.
That's why I hope in 20 years cost will no longer be an issue. With all the tech we have now, and cheaper manufacturing of panels, could we hit 10% of what it costs now? Because that will be the turning point.
I haven't looked at the details but I wonder if you factor in a 15% rise in grid electricity costs what the return on investment curve will look like.
As for sellbacks, in Australia the states set a price for sellbacks, which unsurprisingly has been reduced ~ a lot of states had gross production returns, but tightened up now to fairly low nett production returns.
I think the key is sustainability. Which means getting off the grid as much as possible. Yes, solar prices have to come down, but we gotta have some decent battery tech... If during 6 of 12 months one produces more than one consumes, then that's a pretty big deal.
Will the Apple of renewable energy please stand up?
Edit: Strangely, if you see recent interviews will Bill Gates, he's advocating his new nuclear plant designs and says it's too "dangerous" for everyone to have solar batteries to run their homes. Fairly ironic coming from a guy that made his millions from blue screens of death.