Apparently even in the United States we are getting close to grid parity for individual rooftop solar. It may depend on who's numbers one is looking at and it probably depends on location. At any rate 2/3 of the cost of rooftop solar is installation cost so that looks like a ripe area to reduce cost perhaps more so than concentrating on the cost of solar cells. However, as the efficiency of the cells increase if the cost of the cells remains about the same then the installation cost goes down since the area required for the same amount of power is less. My comment about coal for heat actually pertained to heat for power generation not space heating. Apparently TEP still uses a large amount of coal in the power station in the south part of town by the freeway. Their plans are to sign long term coal
contracts 10 to 15 years in the future. That's the coal I was talking about. We in the dessert of Arizona have so little need for space heating that it makes it very difficult to justify a solar heat system on a cost basis. However, on Philosophical grounds it just seems like the right thing to do especially if one can piggyback the space heating on a water heating system or on a PV power system. At any rate it seems to me that solar proponents are looking at the grid parity of rooftop solar and making the leap to overall grid parity for any solar electric power. The trend is in the right direction but it remains to be seen how soon we will get there and to what extent, as a percent of overall electric supply, solar can supply. The percent that solar can supply to the total demand obviously varies by where it is i.e. Arizona ought to eventually have a high percentage but other areas of the US will have more
From: David R <[address removed]>
To: [address removed]
Sent: Thursday, April 11,[masked]:00 PM
Subject: Re: [alternativeenergy-224] Solar Power at Grid Parity Cost in Several Countries
I think that's because they are talking about large scale solar systems (like the one in the Mohave) competing with grid power costs. You're talking about individual solar panels mounted on each home requiring installers. Those are still not cost effective versus cheap coal, wherever it comes from.....that and they cut out most of the free government money which helped lower the price somewhat.....
Not to worry, solar's day will come soon.....
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