No I haven't. Here is the reason. The only way you can realize a ROI (amortize your costs over 20 years - which is what most quality companies warranty their panels for) is to take advantage of the federal and state tax credits. This means that other tax payers would have to pay for part of my installation.
It is not as simple as mounting some panels on the roof. There are many ways to do solar. Most common is a large battery bank connected to the panels and a controller in between (think voltage regulator to make it simple). Now during the day an inverter or inverters change the stored power in the batteries into 110v and 220v. As you use power from the battery bank via the inverters, any excess beyond your consumption from the panels is stored in the battery bank. If you tie into the grid, any excess electricity beyond what you use and can store is sold back to the public utility... if your local power company is willing to purchase it. At night you run off your battery bank. If the bank gets low, then you pull any needed power from the utility grid. So this means you need room to store and maintain a large battery bank and deal with inverters and other components. And of course components can break and will need replacement.
A while back I priced a 5kW system at $50,000. This will probably produce an average of 30 kWH of power per day over the year in Palm Springs. However last year my consumption averaged 33.4 kWH per day (remember we need air conditioning for several months a year). So this system will leave me short about 1244 kWH for a year. Also, panels become less efficient over time. I have not factored that in.
Last year I spent $1,800 on electricity. Assuming prices do not increase (they will), in 20 years I will spend $36,000 on electricity. The system costs $50,000 (assume I pay cash). If we assume that my total cost will be double over 20 years, then it will be $72,000. Now Ben I know you... If I gave you $50,000 today, what will it be worth in 20 years after you invest it? A lot more than $72,000!!
Of course if I let the taxpayers absorb $25,000 of the installation (moral problem for me), then the ROI is there... but I can make more than $72,000 in 20 years with the $25,000 investment anyway. Today I think Federal and Calif tax credits can net you 50% of the cost, but I have not researched it thoroughly.
However, I think in the next 5 years we are going to see improved technology and lower prices and I may then go solar on the house. The problem for the past 5 years is that with so much government subsidy in the US and Europe, demand was sky high and it kept prices high. For example the Kyocera 120w panel I bought in 2003 for $495 was going for around $700 until the last year or so. Now a similar Kyocera panel can be bought for around $400 (best deal on the Internet). Also the residential solar market is just taking off and prices will get more competitive.
A friend of mine installed solar in his house a few years ago. Much more maintenance and inconvenience than I am willing to deal with now. But that is changing quickly. Sometimes it does not pay off to be an early adapter. Do you want to by an Apple Newton? :)
The solar experiment on my trailers has been a great success, and I am just waiting for technology to get better.