On Friday, November 22, 2019 at 8:04:24 PM UTC-5, wrote:
On Fri, 22 Nov 2019 19:13:53 -0500, Ralph Mowery
wrote:

In article , says...

It costs about $10k for a typical system nowadays with credits; and that won't change
much next year, even with the 50% cut in the federal tax credit. And
the payback period runs from 7 to 10 years depending on your insolation
and average electric supplier rates.




So far I do not recall anyone saying if you put that 10,000 in stock or
something giving aorund 5% interist or if you had to borrow that 10,000
for 5 or more years what would be the payback.

What is the cost reduction per month or year in percent ? Do you save
50 % or 75 % of the cost of electricity ?

My electric bill is well over $200 a month at 11 cents a KWH so to
make a dent in that we are talking a pretty big system, far more than
I have acceptable roof for.

I think they are pushing 300W a panel now, so for a 6KW system, you'd need
about 20.