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When Only The Best Will Do

SA's Leading Energy Solutions Provider

We pride ourselves in providing ‘Value for Money’ high quality energy efficiency products and services to all South Australians.

Cool or Cosy is one of the longest standing members of the Clean Energy Council (a member since 2010).  We can undertake any type of Energy Efficiency project from a small domestic extension to large commercial projects with our range of safe, efficient and quality endorsed products. Our passionate and knowledgeable team, expert installers and reputable brands are the foundation of our success.

Over thirty five years in operation, Cool or Cosy now has over 45,000 customers, an enviable reputation of quality and service, and are currently one of the largest Solar System installers in South Australia with over 14,000 systems installed.

Quality You Can Bank On!

The Complete Package

At Cool or Cosy, we go well beyond just quoting a shelf product or merely quoting from a plan. Cool or Cosy holds Australian Standards Licence 4859 and is passionate about quality.

For Home

No matter what you are looking for in energy efficiency or comfort, we have you covered every time. 

For Business

Providing high quality solar for SA businesses. Ask us today about what we can do for your company. 

The Complete Cool or Cosy Range

Our Energy Saving Products


It's Time To Talk...

We have the latest technology on offer, added with affordable finance solutions, there has never been a better time for storage.

Compact, affordable and simple to install, Powerwall 2 charges during the day and powers your home at night.
The sonnenBatterie is not just a battery, it's an intelligent storage system that automatically adjusts energy usage.
LG Chem RESU battery solution is designed for those who want flexibility over their storage.

How Rex saved with Cool or Cosy

Ready to get quality Australian Made Solar Panels?

What Makes Cool Or Cosy SA’s #1 Energy Solutions Experts?

Our Proud Industry Partners

*promotion ends 31st of December 2023, Terms & Conditions apply.
20% Off, Plus Up To 48 Months Interest Free*