Everyone is right, meaning lots of pros and cons to consider about putting panels on rental properties. If I owned rental properties I am not sure if I would put them on. Lots to consider. As for the 30% from the federal gov it is as a tax rebate. Locally you might actually get a check if an incentive is available. As for damage to the panels that is almost impossible unless tornado fire etc. They are very durable, more than most people think. Also you should add them to your homeowners policy plus they are warrantied usually for 25 years. Increase home value is partically dependent on the experience and knowledge of the appraiser but it stands to reason if you spend $10,000 to $30,000 for a solar system the value of your property should go up. As for creating excess electricity that does not usually happen with most systems because for a lot of reason most systems do not create 100% of needed electricity in the first place. In most areas excess goes into the grid and your meter runs backwards then when you need it your meter is running forward again. No credits and no checks in most areas and states. So it is like a lot of things with property such as carpet, concrete drive, etc, you can provide it or not but if you do you should charge more rent to cover it.