Solar System Size Calculator

12 Month Use	Kwh
Insolator Value	hours	Get hours here
Solar System size	kw

Solar Photovoltaic (PV) panels convert sunlight into electricity.

The system consists of:

• Solar PV Panels generate DC (Direct Current) electricity.
• Inverter converts the DC to standard AC (Alternating Current) electricity that is compatible with the electrical grid and capable of powering electrical devices.
• Racking attaches the solar system to your roof.

AC vs DC

When shopping for a solar PV system, it is most important to understand there is an AC and a DC Watt. Your solar panels produce a DC Watt, and the power flows through an inverter which converts it to an AC Watt. Your home electronics run off AC current. In the solar industry, most solar companies price their systems on a DC Watt. When comparing panels, use the AC rating or the PTC efficiency.

Use the solar calculator on this page to find the system size that fits your home. Two easy steps: You need your annual electric usage(in kW) for the last year, and the average sun hours for your area (insolator value). Input those two numbers into the solar calculator, and it will give you your system size in DC Watts.