Evergreen Solar has 4 current solar panels on the market. I will focus on only two of the families because the ES-Spruce and the ESC are being phased out soon. The main difference between the ES-A and the ES-B is the low voltgage design. Within each of the families, there are 3 Wattage products to pick from. As you can see, the ES-A is a higher Wattage and has a higher performance rating. You can also see this breaks down to a quicker payback, which balances out the higher cost.
|ES - A||Photovoltaic ||Normal||200||90%||12 Months||25 Yr|
|ES - A||Photovoltaic||Normal||205||90%||12 Months||25 Yr|
|ES - A||Photovoltaic||Normal||210||90%||12 Months||25 Yr|
|ES - B||Photovoltaic||LowVolt||180||88%||15 Months||25 Yr|
|ES - B||Photovoltaic||Low Volt||190||88%||15 Months||25 Yr|
|ES - B||Photovoltaic||Low Volt|| 195 ||88%||15 Months||25 Yr|
I have also done a brief product review of the Sunpower Residential Solar Panels. Check out my article on Sunpower Solar Shingles. Also, find out how to get a free solar panel evaluation from the leading solar panel manufacturing companies