The solar electric panel picture is attributed to Dominic's picks (taken from Brighton Earthship Solar Panel).
The solar panel voltage is specified in Volts (DC) and its available current is specified in Amperes
Another specifications you will find is the kWp (Kilowatt Peak), a measure of the nominal power of the solar panel exposed to "standard" laboratory illumination conditions. one Watt is an electrical power unit, the multiplication of 1 Volt and 1 Ampere. One Kilowatt is 1000 Watts.
The Peak stands for what the panel will produce in noon time of a sunny day. Since the sun doesn't shine in night and since its angle is not optimal early and late in the day, the total energy the panel produces in 24 hours is not 24 times the KWHP rating. It is more like 6 times the KWHP rating and it depends on the season and the location.
The solar Electric Panel Video
I invite you to watch a short video on the assembly of a solar panel
Thin Film Solar Panels
The video shows legacy solar panels, there is a new emerging technology of thin film solar panels. Click to see what are the Thin film solar panels everyone is talking about
Size, Power and efficiency
Same size solar panels won't produce the same electric power even if they are exposed to the sun. Differences in technology cause different efficiency, so the amount of power in Watts produce per square feet (or per square meter) is different for different panels. In most cases, an homeowner can allow for bigger size panels and really interesting comparison would be the price of the solar panels in terms of $ per Watt, a number that can go anywhere between $1 to $5.
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