You should not consider investing in green energies unless you are ready to spend at least fifteen years in your home. Paying off your solar energy system will take you years and the return on your investment will depend on how long you stay in the same home and keep using the solar energy system.
If you have animals that require electric fencing to contain them, use solar powered fencing units to provide power for them. A great advantage to these systems is that they are completely mobile, and can be easily moved. If you are a horse owner who enjoys overnight horse-camping, the fencer can be easily taken along.
This is a small solar window heater that I built for apartments or condos or even houses that have a strict hoa. It is made just to sit in a window for fall and winter.