expensive part of the dc to ac inverter solar
You also need to look at how much power you actually use. Installing low frequency inverter solar home panels is a good thing to include as part of an overall conservation program, where the house is switched over to more energy efficient appliances. (If your refrigerator is more than ten years old, for example, odds are that a modern replacement will use 25% less energy, for instance). Even switching to lower power bulbs, like going from incandescent to compact fluorescents, can make help reduce your total home power budget.
In some counties and areas, if you generate more electricity than you're using, the utility company is obligated to use net metering, or relative buyback metering. In places where this holds, you can often times get a home solar electricity installation run to pay for itself in less time - and you get to see how much electricity you sold back to the electric company. (Sometimes, they'll even send you a check for the difference, or just apply it as a credit against future bills.) However, one unspoken advantage of this type of system is that it reduces the amount of material outlay you have to buy. You no longer have to buy a battery array if your excess power is fed back into the grid and you get a credit. While the battery array is the least expensive part of the dc to ac inverter solar home panel’s setup, it's also the part that needs direct maintenance and replacement the most often, so this can make a difference in your overall savings.
http://solarups.egloos.com/5974602
http://mustsolar.blogspot.com/2016/02/building-your-own-charge-controller.html