sunpower panel comparison

[jusmom154]

Can someone tell me if there is a big difference between the spr-x20-250 - blk and the spr-x21-255. I know the x20 is older technology but not sure if their is a huge performance difference. When looking at the panel comparison the 255 obviously produces more watts because it is a 255 vs 250. I have already signed an agreement for the x20. I was just curious if I gave up a lot by not going with the x21. This was for system purchase.

[Ian S]

Can someone tell me if there is a big difference between the spr-x20-250 - blk and the spr-x21-255. I know the x20 is older technology but not sure if their is a huge performance difference. When looking at the panel comparison the 255 obviously produces more watts because it is a 255 vs 250. I have already signed an agreement for the x20. I was just curious if I gave up a lot by not going with the x21. This was for system purchase.

About the only performance difference is a slight increase in efficiency with the 255 watt panels. Probably matters less than the difference in height of Cadillac tail fins going from model year 1959 to 1960. Imagine how I feel with my ancient 230 watt Sunpower panels installed in 2012!!

[jusmom154]

Thanks for the reply