Correct, i agree to all these. I just meant that there are hardly many ways to decrease costs for large-scale solar available now except cell efficiency (not fo

Correct, i agree to all these. I just meant that there are hardly many ways to decrease costs for large-scale solar available now except cell efficiency (not for U.S. where majority of costs are red tape and scarcity of installers, i mean countries where markets are established like Germany or Italy). Also, there is not much NEED to decrease costs below those achievable with efficiency increases (especially if efficiencies ca. 30% are achieved, which is possible like, 10 years down the road). A solar power plant with fully installed system cost of $1.5 per watt will be cheaper that high-voltage grid in majority of places, at $1 per watt in nearly every place. >We've got cost reductions built in to PV production for the foreseable future. In which way? Production capacity-related economy of scale? Current production capacity is already close (well, at least half of) what can be sustainably loaded worldwide. Maybe, another 2x growth is possible because factory builders don't care much if their business is sustainble long-term, they will work until worldwide demand is filled. But i will be very surprised to see over 300 GW/y production capacity worldwide anywhere in the coming 10 years. Apart from economy of scale, there is little way to reduce price.