"then there is Metallurgical Grade [MG] used by the steel and metals industry as an alloying material. MG (98-99% pure) is made from relatively crude materials"
So far, I know only CSIQ producing Solar PV using UMG material which is much cheaper than the regular silicon.
Solar Stocks After Earnings: Suntech Up, ReneSola Down [View article]
Solar Stocks After Earnings: Suntech Up, ReneSola Down [View article]
I believe most of those are undervalue especially STP telling everyone 2009 will not be oversupply at all.
Solar Grade: A Silicon Revolution [View article]
So far, I know only CSIQ producing Solar PV using UMG material which is much cheaper than the regular silicon.