" Let's assume they solve the materials science and engineering challenges - and that there is money to make product. What is the market place (not grid solar) and who are the sellers? In other words - what is our route to putting cash from sales in the bank? Tata walked away in 2013 (metal roofing).
The best partner is one who has a massive in house requirement (we had that in UK but somehow it evaporated), just as Pilkington walked. Better stop here otherwise it becomes an epistle."