### Estimating Energy Generated by your PV System

Using the equation below, you can estimate the annual electricity production and electric bill savings for a grid-connected home solar electric system with a net metering arrangement.

### Determine the PV system’s size in kilowatts (kW).

A typical range is from 1 to 5 kW. This value is the “kW of PV” input for the equation below.

Based on your geographic location, select the energy production factor from the map below for the “kWh/kW-year” input for the following equation.

Electricity production from the PV system

`kWh/year = (kW of PV) × (kWh/kW-year)`

### Calculate the watts if you know the voltage and amperage of a device.

`Watts = Volts x Amps`

If your T.V. plugs into a standard 120 volt receptacle and uses 4 amps, the total watts is calculated by multiplying 120 volts x 4 amps. That equals 480 watts.

`120 Volts x 4 Amps = 480 Watts`

### Diagram of a simple solar stand-alone PV system

https://soveriegntysolar.files.wordpress.com/2012/07/809_typicalstandalone_web.jpg

### Meagle Sun

Some simple examples of rural off-grid power provision.

http://www.meaglesun.com/en/