You also may qualify for a 30% federal tax incentive for renewable energy.
Check with your tax preparer. The credit for "qualified solar electric property" applies only to solar systems installed on a main or second home located in the US. It does not apply to solar systems installed merely to power aeration systems.
In doing my research I learned way, way more about solar than I wanted to. This was primarily because when we eventually build the house at our pond property I wanted to build it using solar and geothermal technology.
An improperly designed system does not take into account the average number of hours of sunlight, which obviously varies region by region and often does not take into account inverter inefficiencies and required battery reserve (most solar sites recommend that you do not discharge batteries below 50%).
The solar forums mentioned above are great sites and I used some of those sources for my research.
