Determining The Right Size Solar Power System

There are three different methods to determine the size of the home solar panels as your roof will allow is the way to go. This is not be the best way to determine how many and the proper placement of the solar panels. When you first install all of the solar panels possible, this will initially increase the over all value of the solar system. But due to the shading effect, the electric rate tier and the rebate programs available, this makes installing more modules after a certain amount to cease to be cost effective. Installing more solar modules beyond a certain point that is needed is not cost effective.

The matching of the panels to your available space will of course benefit the installer but will not the the best economic value for the home owner. The modules that will be in the shaded areas or even partially shaded during the day time will produce less solar electricity then the modules in the full sun. It may be necessary to do a solar site survey. The Solar Pathfinder is used to determine if it is economically beneficial to install the modules that will be placed in the shade or that is partially obstructed during the daytime.

Another way to determine the solar modules needed is the produce just enough generating capacity to eliminate the electric monthly bill. If you are on a tiered rate plan, you will receive proportionally less for the power in the lower tier rates. This means you will receive the maximum to start with, but as you overproduce, the credit will drop at given levels.

One of the best ways to determine the exact size of the solar power is to determine the Net Present Value of each system alternative. This will include the varying number of panels, inverters, the installation techniques and the component manufacturers. The Net Present Value should take into account a few other things such as your discount rate, the electric cost escalation rate, the tax rate and the incentive programs available such as the rebates, different tax credits and other factors such as accelerated depreciation.

The solar power systems can help you to save money. A representative of the solar installation company can and will answer your question and help to determine what tax credits, state rebates or even if any free financing is available in your area. Most of the solar installers will conduct an free initial evaluation to determine if your property is a candidate for the solar power system. The roof and electrical usage will be analyzed using a few of your past monthly electric bills.