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.
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 an award-winning Australian electrification company that specializes in solar energy systems, Tesla Powerwall battery installations, smart air conditioning, and hot water heat pumps to help homes and businesses achieve energy independence. They operate primarily in the Australian Capital Territory (ACT), where they participate in the ACT Government's Sustainable Household Scheme offering low-interest loans for energy upgrades. What makes them notable is their impressive collection of certifications and awards, including being named Enphase ACT Installer of the Year 2024-2025, a Premium Tesla Powerwall Certified Installer since 2021, and ranked #2 Most Popular installer in ACT by SunWiz Awards 2026.
