After much procrastination and deep soul searching we have installed a 5kw solar system. We don't use a lot of power by normal standards, and we had solar hot water already. We were troubled by the return on the power to the grid, which is about double normal wholesale to the power company, so effectively it seems that those too poor to go solar subsidize those wealthy enough to get it installed. But then there was a deadline and we had to act now or never, so we did it and I am feeling guilty but there ya go.
It should take about 5 years to pay it off, and then we can hopefully enjoy free electricity in our old age. I am altruistic enough to hope that enough roof panels on enough houses can keep another coal fired power plant at bay, to the benefit of the whole planet, not just my little dot on the map. The summer we are having makes you think about a hotter world, and what it will be like to live at 2 degrees more as an average. There would be fewer nice cycling days! Aaaccck!!