With most of the low hanging fruit of polysilicon costs already gone,the industry has to focus on efficiency to cut down on costs.Selective emitters,microinverters,DC-DC optimization and other technologies are already finding takers.A Number of microinverter companies like Tigo,Enphase Energy etc are tying up with global heavyweights like Suntech and Sunpower to increase their penetration and cut costs.National Semiconductor has also tied up with Suntech to integrate its products with Suntech Modules to improve efficiency and reliability.The Balance of Systems costs for Solar Panels and their Performance are not usually paid a lot of attention.But with every cent now making a big difference,these technology could make or break a company in this commoditizing industry.While the value addition and costs of these new products are still subject to market acceptance,its a major change for the industry.This is the next phase in the evolution of the solar energy industry as it looks to additional ways to cut costs and bring solar energy to grid parity.Look for M&A in this space as well since the industry is fragmented with a host of VC backed startups.