Australian CO2 Exchange (ACX) is a comprehensive provider of accredited GreenPower and carbon offsets. 

Organisation wishing to reduce their carbon footprint using GreenPower or accredited offsets should contact us directly on 03 9805 0728.



Our group has successfully completed multiple consulting projects across a range of carbon, energy and sustainable design issues.

We work with government private enterprise, and NGOs.

See Capabilities here.


We have introduced numerous systems for improving the accuracy and effectiveness of energy and carbon monitoring, analysis and reporting.


CarbonTracker allows users to graph and analyse their usage in real time.  



We provide seminars and educational services to assist organisations understand carbon management environmental reporting, energy efficiency and emissions trading.

Click here for current courses.


We have changed our name!

Australian CO2 Exchange Pty Ltd (ACX) has merged its operations with Argyle Systems Pty Ltd.

GreenPower provider Australian CO2 Exchange which previously traded under the name Ark Climate has assumed the operations of Green IT and resource efficiency specialist Argyle Systems Pty Ltd. The new combined operation trading as ACXargyle will give customers the ability to resolve a wider spectrum of sustainability issues under the one umbrella.

The  new branding was accompanied by other changes at board and advisory board level for the two companies. There was no change to ABN or corporate entity for ACX customers.


GreenPower Discussion Paper released by VCMA

Getting GreenPower to work again.

Your options for purchasing renewable energy are currently limited while we wait for the federal government to determine the new ground rules for the national GreenPower scheme. This discussion paper from the Voluntary Carbon Markets Association, lays out the issues. More ..



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