Siena Catholic College

Customer Profile

When the outgoing Principal of Siena Catholic College in Sippy Downs Queensland announced his retirement at the end of 2016, he wanted to be able to leave behind a legacy item – an 80 kW solar system from Planet Ark Power, for the school and its students to benefit for years to come.

Sippy Downs, QLD


Siena Catholic College


Siena Catholic College was looking for a way to reduce energy costs, reduce CO2 emissions and provide a more sustainable campus.

With 1,000 students onsite, the project had to be completed within WHS guidelines and accommodate logistical, scheduling and construction restrictions. Planet Ark Power was able to design and implement an integrated, end-to-end solution.


Planet Ark Power designed a rooftop solar system, consisting of 80 KW of rooftop solar using 308 solar panels and 3 inverters.

Anticipated to generate 120,000 kWh to mitigate against cost of future energy price rises saving an estimated $26,475 in annual energy costs. Estimated annual emission savings of 92 tonnes of carbon – the equivalent 200,000 kms travelled by car in a year.


The Siena College installation has been operating smoothly since its commissioning in late 2016. The system has been a success and operated as a reference point for Planet Ark Power securing additional school sites for its commercial rooftop installations.
Planet Ark Power Icon - CO2e Savings

92 tonnes CO2e Savings p.a.

Environmental Impact

Planet Ark Power Icon - Solar PV System

80.08 kW System Capacity

Planet Ark Power Icon - Savings
31% Annual Savings

Reduction in power cost

Siena Catholic College
Siena Catholic College

We have installed an 80 kW system that meets the complete needs of the College and significantly reduced our $75,000 a year electricity bill.
Graeme Hight, Siena Catholic College, Principal (2016).
To learn more about Siena Catholic College visit their website at