SunPower is just getting ready to ship the first E20 series panels to dealers in about a week. There is a lot of hype around the most efficient and best performing solar module in the industry for residential and commercial applications. The new E20 Series modules are currently rated at 327W and boast a 20.1% efficiency, an improvement from the 19& efficient E19 series.
My first 3D computer model just came out with the new SunPower modules. They look great!
Your customers should be impressed by them. I have had 12 x 327W panels on my roof since last December here in the UK. They do outperform all other panels at the same latitude (as far as I can tell from mine and other people’s data on http://www.pvoutput.org)
I particularly like the black frames which make them look far less tacky than those with shiny aluminium ones, and of course you get higher output for a much smaller space. (We’re limited to 4kWp systems here in the UK if you want to receive the highest FIT rate).