Saturday, August 31, 2013

QOTD

 
And more bad news for those focusing on storing solar power in batteries – the new study does not believe battery storage will be economically feasible until the 2030s.

Tuesday, August 27, 2013

Diseconomies of Solar Scale

Mr Fraser this week unveiled AGL's plans to proceed with two solar power plants costing $450 million for Broken Hill and Nyngan in western NSW. The 155-megawatt capacity will meet the power needs of about 50,000 homes, and be about 15 times bigger than Australia's largest plant.
In my view, the most cost-effective way to develop solar is with large-scale projects," Mr Fraser said. "You get the economies of scale.
Consumers switch on to solar power - August 2013

Conventional wisdom supports Mr. Fraser's contention - data on the other hand tells a different story. $450 million for a 155 MW solar farm works out to $2.90 per watt. Solar Choice has the average unsubsidized price for 1.5 kW rooftop systems throughout Australia at $2796/kW. That price goes down to $2277/kW for 5 kW systems. It's rather remarkable that a 155 MW photoelectric solar farm that is 100,000 times larger than a modest 1.5 kW system would be more expensive on a unit price basis. To be fair I should point out that the solar farms are tracking plants so that accounts for part of the extra costs. That said, $2.90 per Watt is high even for a tracking plant.