I read this case study the other day - Kings College in London:
Here's mine:
Average monthly electric cost, 3 bedroom 2 bath home, all electric -- $135
Times 12 is $1,620 annually.
Cost of solar panels and controls: $22,800 this is for going completely off the utility, and actually
turning their meter backwards during periods of very low energy usage while still having electric service for when we have extended periods of NO SUN.
Where I live, we have an average of 204 "sunny" days a year.
It's not hard to see the issue here. If I successfully match my energy usage, making my electric bill zero, it will take 14 freaking years to pay off the investment. This does NOT count replacing panels, batteries, and maintenance on the controls over that 14 year period.
If I am able to turn their meter backwards enough to get PAID the $1620 annually, that's $3,240 towards the investment every year. That's still SEVEN years before getting paid back on the initial capital outlay. That's best case scenario that again, doesn't take into account replacements, maintenance or repairs. Add at least 2 more years to the note, to cover that.
See? It's stupid. There are much better ways to invest your money. And that's the reason for cap and tax.
When cap and tax doubles my electric bill, you can see from the numbers above that solar
almost looks viable.
This is why everyone must crunch
their own numbers, and not rely on anecdotal stuff like I just gave you, and that you linked here for us.