I can't be bothered with solar, a little too "iffy" in my opinion, not enough efficiency in the panels, yet. Much more efficient panels are under development though. Solar is reliant on Government subsidies, and we all know where that will lead.....to zero subsidies and will just end up as a 1:1 ratio, so no actual cost/benefit. It has already cost Governments $550 million, I believe.
What about maintenance and efficiency drop off over the lifespan of the panels? This will happen over time, particular, if a single panel in the system fails and reduces efficiency in the system as a whole. Also, I understand that there is an obligation, on the householders part, to maintain efficiency of the system, otherwise, you may find that the engergy company could cancel any contract. I also believe that the contract is not necessarily transferable to a new owner, so there may be no real added value to the property in having a system installed, which is why I originally thought about installing a system. Apparently, it is all in the fine print.
However, for those that have gone down this road, producing extra power is only half the equation anyway, as reducing the "need' for energy is the other half of the equation, which is the way I am going.
I am changing "all" my house lights to LED's, which are very energy efficient, and replacing appliances with more energy efficient devices (most are due for replacement anyway), which will considerably lower my use of energy.
In addition to that I am changing my habits in the way I use (waist) energy. For instance, if there is nothing on television, instead of just sitting up and watching trash (which is what's on most of the time, or it's repeats), and leaving the heater on (wasting gas), I go curl up in my nice warm bed with a good book, at least, in winter. Got lots of astronomy books to get through anyway. Also, I no longer leave all the lights on, if I am not in the room, which I had a bad habit of doing. Furthermore, I leave nothing on standby and switch everything off at the wall.
So, having a solar system is only half the answer to reducing costs. Reducing the amount of energy used is just as important.