GREY:NTCXF - Post by User
Comment by
ck123on Aug 12, 2011 10:57pm
270 Views
Post# 18938340
RE: RE: RE: are seperate calculations possible?
RE: RE: RE: are seperate calculations possible?Illumination,
Grid parity is a useful concept.
Qsolar has a unique way of developing its wafers which results in less waste as they get rid of the wire saw that is used everywhere else. Since solar silicon is so expensive... less waste means they save money. This is how they reduce their imput costs and achieve as they claim 'grid parity'.
Do not extrapolate efficiences out of cost/watt. It is true that the cost per watt will go down as the efficiency of a panel improves so long as the manufacturing cost involved in producing that additional efficiency does not negate the gains created by the additional efficiency. A lower cost/watt however does not mean that a panel is inherently more efficient.
But a watt is a watt right... so who cares how efficient the panel is. I do.
I would rather install 30% panels produced at 0.75/watt than 15% panels produced at 0.75/watt.
But won't it cost the same to order 2 KW from the supplier?
I would rather install 30% panels produced at 1.40/watt than 15% panels produced at 0.75/watt.
First Solar might be able to produce panels at 0.85/watt but they are 10% efficient. The 5% difference adds about 0.50/watt because of the increased balance of system costs compared to a silicon solar cell. A First Solar panel at 0.85/watt would be equivalent in full cost to a silicon system at 1.35/watt.