# Photovoltaics - Watts per Area

Calculator for the achievable power of a photovoltaic system on a certain area. Solar cells can generate 160 watts (watt-peak, Wp) per square meter. The practical value is a bit lower because the solar panels have a frame and a gap between them. Also, the available area often can't be filled completely, which is especially relevant for small areas. For this, see the calculator modules per area.

Here you can estimate quick and easy, which power can be placed on a completely filled area. The area loss refers to frame and gap, for this three percent is a good estimation. Area loss and two of the three other values have to be entered, the fourth value will be calculated. If the total power is calculated, the unit watt (W), kilowatts (kW) or megawatts (MW) will be selected automatically.

Example: on a roof with an area of 50 square meters, 45 can be covered with a photovoltaic system. The expected power is then almost seven kilowatts peak.

Solar - Photovoltaics - Calculator | German: Photovoltaik - Rechner

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