the ACT's #2 Most Popular Solar Installer for 2026
Recognised in the 2026 SunWiz Awards as a #2 Best Rated + Most Popular installer – ACT, based on verified data for the 2025 calendar year.
Sunstak has been named Best Rated Solar Installer in the ACT for 2026 by SunWiz, also taking out #2 Most Popular Installer in the region. See the full endorsement: https://www.sunwiz.com.au/sunstak/
Hi, I'm David McElrea, CEO of the Smart Energy Council.
And hi, I'm Warwick Johnston, the founder of SunWiz.
We've partnered to help consumers choose an installer for their solar and storage system.
SunWiz has determined Sunstak is among Australia's best-rated solar businesses.
Customers should work with Sunstak Energy because we are passionate; we care about energy. When we talk to you, it's about educating you, about empowering you with knowledge to be able to make the right decisions when it comes to renewables.
So we encourage you to buy from Sunstak.
They rank among Australia's top-tier solar installers.
Choosing a solar installer you can trust is hard — the market is full of bold claims that are difficult to verify. SunWiz Awards exist to help Australian homeowners cut through that: they recognise the solar companies proven by independent installation and customer-review data — not marketing, nominations, or paid placement — to be among the best in their region. Sunstak is one of them, recognised for #2 Best Rated + Most Popular installer – ACT on verified data.
Since 2009, SunWiz has tracked every solar power system installed across Australia, documenting each company’s installation volume. Rankings draw on the Clean Energy Regulator REC-Registry plus verified records from STC service providers, and on audited customer review data for review-based awards. Ranking positions are determined by data, independent of whether a company chooses to participate — SunWiz Awards are determined exclusively by data rather than by judging panels, nominations, or sponsor relationships. As the recognised authority on Australian solar market volumes, SunWiz data is referenced by corporations, NGOs, and government bodies.
Sunstak is a solar and battery installer based in Hume, ACT, servicing Canberra, Queanbeyan and surrounding regions, with a further presence covering Wollongong, Shellharbour and Kiama in New South Wales. The company has been operating since at least 2021, when it became a Tesla Powerwall Premium Certified Installer, and has since grown to a team of more than nine staff.
The business designs and installs solar panel systems, battery storage and EV chargers, working with brands including Tesla Powerwall, GoodWe and WINAICO. Sunstak has completed installations across more than 1,000 streets in the Canberra region, including Belconnen, Gungahlin, Tuggeranong, Woden, Weston Creek and Molonglo Valley, as well as commercial and larger-scale projects.
Sunstak emphasises clear, upfront scoping and pricing, confirming the installation plan with customers before work begins and seeking approval for any changes along the way. Installations are carried out by master installers who have each completed at least 100 jobs, and the company backs its work with a roof leak guarantee and a stock guarantee covering equipment substitutions.
