Well, That Tears It For Me - I'm Voting GINGRICH!

[Sue U]

A colleague just installed a system which will break even in < 10years using (very expensive) U.S.-made SunPower panels. The design goal is to generate about what he uses over the course of a year (so he in in surplus in the summer and deficit in the winter). So far it works as planned.

yrs,
rubato

Our system was also designed to generate the same amount we use in the course of a year, but it turns out to be somewhat less effective than that by about 30% over all. In months with longer days and lots of sunshine our electric bill goes pretty much to zero, but in the deep of winter we're paying for about 50% of our usage. We had estimated the break even point at about 6-7 years, but it will probably actually run about 10.

[rubato]

"... We had estimated the break even point at about 6-7 years, but it will probably actually run about 10.

Based on a constant cost of electricity?

yrs,
rubato