Casuarina Library
Solar Generated Power Project

Type: Photovoltaic Grid Connect System
Size: 99.84 kilowatts
Panels: 416 X 240watt polycrystalline modules
Pay back period: 4 years
System lifetime: 20 years
Trees offset: 4167 over 20 years
Greenhouse gas offset: 2588 tonnes of CO2e over 20 years

Casuarina Library
Solar Generated Power Project

City of Darwin Strategic Plan
Goal 3 - Environmentally Sustainable City


Outcome: Council’s carbon footprint is reduced


Strategy: Reduce Council’s greenhouse gas emissions

City of Darwin has greenhouse
gas emissions reduction targets

'15% reduction in greenhouse gas emissions from
Council operations (tCO2-e) by June 2016 based
on 2008/09 levels'


'60% reduction in grid electricity consumption from
Casuarina Library operations (kWh) by June 2016
based on 2008/09 levels'

What is Solar Energy?

Solar energy is the energy of sunlight
collected and used to generated electricity


Sunlight is a clean, renewable 
source of energy


Darwin has more than 200 days of sun each
year so solar energy is a sensible choice

How does a solar panel work?

The sun shines on the solar panels, generating "DC" (Direct Current) electricity.

The electricity is fed into a solar inverter that converts into "AC" (Alternating Current) electricity.

The AC electricity flows into the mains and is used onsite.

Any power not used in the building is available through the main power grid for others to use.

How does a solar panel work?


This system is unique…


There is an electronic “brain” under every two panels Why is that special?

The brain lets the solar panels work individually to produce the maximum possible power from the available sunlight.

If one panel develops a fault the brain lets us know electronically.

This is one HIGH TECH solar system!

This system is made up of…

416 Solar Panels (240 watts each)

6 inverters (17 kilowatts each)

Almost 1 kilometre of aluminium solar rail

Over 4000 screws to hold down the solar framing

Over 1 kilometre of electrical cable

Photovoltaic (PV) solar panels

(polycrystalline modules)

Six 17kW inverters

Inverters are linked to the internet