Just cobble together your homes energy supply with a bunch of Craigs List stuff. What could go wrong?
Where's your sense of adventure? ;-)
Actually, I've found some very good stuff on C/L from time to time. One of my (too many) hobbies is restoring mid-century-modern teak furniture. People need to move and can't (or won't) take it with them, or it is slightly damaged and easily fixable. I'm able to furnish our home with some seriously nice, once quite expensive pieces for next to nothing. If you saw some of them and I told you how little I paid, you'd call me a liar to my face.
I also repair and upgrade Dynaco brand stereo equipment (70's vintage tube stuff) but lately the prices on those have inflated greatly - they think they have gold, so I pass on most of it now.
Also snagged a $600 Mercedes-specific diagnostics computer (extended OBD-II, uses all 37 pins of the 37 pin connector - tells me EVERYTHING about the car) Paid a fat $50 - didn't fit his model but works on mine. Saved me a $1,000+ A/C repair bill when it pinpointed a bad control module which I replaced with a used one off eBay for $12 instead of $450 for a new one. Heck, the car is "used" so why should I replace a non-wear item with something new at full retail? (Yes, it gets new tires and other consumables ;-)
As to solar cells to power my home, that's a goal I'd like to achieve. The electrons don't care if they come from brand new solar cells or from last year's model. The home is already built, it is very well insulated, has double pane windows, high efficiency appliances, etc., etc., etc., and our power bills don't exceed $100 a month even in the summer. (I used to be a slumlord, I paid attention, so I know lots of ways NOT to design houses.)
First step is to augment power to the hangar/workshop with solar. There's a vent fan which runs every day from April through November to keep the inside temperature within reason. That's a prime candidate for solar, it runs on hot sunny days, and is on a thermo switch so if it isn't hot in the hanger, the fan doesn't run.
Remember, if it doesn't work, I can always go back. But I do want to try, and buying used solar cells from C/L limits my risk. If I buy a brand new system and it is not appropriate, I'm out a lot of money. If I cobble something together and it doesn't work, it just goes back onto Craigslist. (Proof of concept.) If it does work, I can then decide if it works well enough to keep it OR well enough to make it worthwhile in paying for a new system.
One thing I have found is that installers always seem to raise the prices of their new systems (gotta be new to qualify for the rebates) to exactly match the state and federal rebates available. The rebates go away, and the price immediately goes down to match the lost rebate amount. This stuff isn't rocket science, and in fact it is surprisingly simple. I prefer to duck the whole financial mess by doing it myself. Our local building inspector will (hopefully) keep me from burning the house down but steel and concrete don't burn very well anyway.
What could go wrong? Lots of things, but at least if I do this myself, I know how to fix it or retreat from it.
With best regards,
Mike/Florida