Commercial solar, batteries and electrification
We help businesses, schools, embassies and community organisations across the ACT with energy systems designed around their buildings and daily operations. From design to installation, our team works with your project manager to coordinate access, meet deadlines and minimise disruption.
6 named commercial clients · 2 case studies with the client quoted · Capability statement, July 2025
- Austrian Embassy
- Royal Thai Embassy
- Trinity Christian School
- ByGeorge Film Studio
- C3 Church Monash
- Duffy Primary School
Energy systems built around your business
Rooftop solar
Make your roof work for you with solar designed around your site and daytime energy use.
Battery storage
Store energy for when you need it and help reduce peak demand costs.
One contractor, one invoice
We coordinate switchboard upgrades, wiring, lighting, air conditioning and EV charging as part of your solar or battery project.Our team, credentials and experience
Get to know the people, accreditations and completed projects behind our commercial work. You’ll find the details in our capability statement, available to download below.
Our size and capacity
- Batteries installed
More than 1,000
Batteries installed More than 1,000 Across the ACT and surrounding regions
- Deployment capacity
200+ per quarter
Installation capacity 200+ per quarter Supported by the install schedule and the local warehouse
- Office staff
10+ full time
Coordinating projects, logistics, safety and customer support
- Warehousing
Local warehouse
Stock held in Canberra Staffed full time to support reliable project delivery
- Certification
Project capabilities
Residential and commercial Solar and battery storage, with hot water and air conditioning available as part of your project
Our experience with government energy programs
We’ve helped hundreds of households access government support for energy upgrades. That experience brings careful coordination, documentation and compliance to our commercial projects.
- ACT Sustainable Household Scheme
- 550 participants · Approximately $6 million in support
- ACT NextGen Battery Rebate
- 247 participants · Approximately $1 million in support
- Cheaper Home Battery Program
- More than $2 million in battery certificate discounts These figures reflect our work through each program, rather than the support available to an individual household.
These are delivery totals, and not current rebate rates. Figures and rates as at July 2025.
We did not encounter any administrative issues and Sunstak complied with the conditions of their Deed of Grant with the ACT Government.
Accreditations
Premium Powerwall installer, since 2021
ACT Installer of the Year, 2024 · 2025
Best Rated, 2026
- SolarQuotes
ACT Top Rated Installer, 2024
Approved seller
- SAA
Solar Accreditation Australia approved
- ACT Government
Sustainable Household Scheme
How we work
From your first energy bill to switching on your system, we guide you through every step.
Share your energy bills
Send us a summer bill and a winter bill, and tell us when you use the most energy. This helps us design around your household.
Talk to an Energy Geek
During a home visit or phone consultation, we discuss your goals and review your roof, switchboard and meter.
See your system design
Our engineer designs your system in house. You’ll see where the equipment will go and understand why it suits your home.
Review your quote
Your quote clearly lists equipment, model numbers, inclusions and exclusions. Take your time to review it. We only order once you approve.
Get ready for installation
We explain what to expect on the day, including any planned power interruptions and how long they should last.
Enjoy ongoing support
We get your system running and set up your monitoring app. For questions, service or warranty help, the same team is here after installation.
Our commercial projects
See how we've helped schools and community organisations across the ACT, with feedback from the people who ran the projects.
Commercial rooftop solar Wanniassa ACT
A school hall in Wanniassa
A school roof is a set-out problem with a deadline attached. We planned, delivered and commissioned the array inside the break before the new term. Somebody else coordinated the site. 40 kW of panels onto one long hall roof, in five days, with six people on it.
Thank you for delivering this project before the start of a new school term
Project Manager, Trinity Christian School Sunstak Capability Statement, July 2025 - Panels
- Trina Solar
- Inverter
- 30 kW Sungrow commercial
- Solar
- 40 kW
- On site
- Five days, six staff
Commercial solar and battery Lyneham ACT
A temple in Lyneham
Community members referred the temple, worried about its power bills. The complex is large and draughty, and expensive to heat. 20 kW of solar and a 20 kWh battery, with the meter board upgraded to carry it. The battery holds the demand peak down, which a commercial tariff charges separately from the energy.
The Abbot is very pleased and wishes to pass on his appreciation and support to get this project delivered
Project Manager, Wat Dhammadharo Sunstak Capability Statement, July 2025 - Solar
- 20 kW
- Battery
- Sungrow SBH Battery
- Battery capacity
- 20 kWh
- Switchboard
- Meter board upgraded
The capability statement
Learn more about our team, credentials and project experience. Download a copy to share with your project manager, board or procurement team.
- Awards and industry accreditations
- Residential and commercial services
- Commercial projects and client feedback
- Government program experience and compliance
- Contact details and locations
Talk to a Commercial Energy Geek about your site
- Business developmentRichard Ko
- Managing directorMichael Brown
- Office02 5127 5000
- Headquarters15/68 Sawmill Circuit, Hume ACT
Book a chat about your commercial site
Choose a time to speak with an Energy Geek about your site, energy costs and solar or battery plans.
- Solar Accreditation Australia approved
★★★★★
Having used two other installers previously, the Sunstak experience is head and shoulders superior…
Ask for a quote