Leaderboard ranking

Electricity usage


Sum per week

Kilowatt hours (kWh) is the amount of power consumed over a period of one hour.

The Quadrangle Building, or Quad Building, is located on the middle campus of UNSW.

It also has a 42kWp photovoltaic solar cell array on the north-facing roof which was installed in 2005.

The output of the system is fed into the normal power supply of the Quadrangle building, reducing the demand on our electrical mains. It will also provide enough energy to run the equivalent of 300 computers on campus every day, and save more than 80,000 kg of greenhouse gas emissions each year.

The performance of the Quadrangle Building PV system can be observed from a touch screen display located on the Quadrangle Lawn opposite the Quadrangle Building. This display can show the power produced by the PV system, or the electrical energy produced over any daily period, since it was constructed in 2005. The interactive display also provides useful information on solar electricity.

Quadrangle Building Photovoltaic System (Roof)

The Quadrangle Building PV system uses BP Solar Saturn PV modules, which were developed at UNSW. The entire PV module roof array is rated at a maximum of 42 kiloWatts under ideal conditions, although the actual amount of electrical power produced at any time is dependant primarily on the angle of the sun, the extent of clouds, and the air temperature. The Quadrangle Building PV system is also "grid-connected", which means the electricity produced by the roof mounted PV array ultimately is supplied into the Quadrangle Building electrical infrastructure. The roof mounted PV array produces "direct-current" (DC) electricity, which is then converted into "alternating current" (AC) electricity by thirteen microprocessor-based inverters located in a roof plantroom between the two roof array sections. The AC electricity is then supplied into a normal building switchboard on the top floor of the building, from where the solar produced electricity is used around the building.