Commercial & Industrial Solar in Perth Metropolitan
A guide to choosing commercial and industrial solar suppliers in Perth Metropolitan, with 94 businesses covered and what to check before signing a contract.
Commercial and industrial solar covers everything from a 30kW system on a warehouse roof in Malaga to multi-hundred-kilowatt arrays for cold storage facilities, factories and shopping centres across Perth Metropolitan. Unlike a small residential job, these projects involve three-phase inverters, structural assessment of the roof or ground-mount frame, load analysis against your actual business usage, and often a battery or demand management component to cut peak charges. Many installers in this category also handle the paperwork for Western Power network approval, STCs (small-scale technology certificates) or the STP scheme for larger systems, and any council or landlord sign-off needed before work starts.
What to look for in a supplier
Check for CEC (Clean Energy Council) accreditation on both the installer and the specific electricians on site, since this affects warranty validity and any rebate eligibility. Ask for a site-specific design based on your actual power bills and roof orientation, not a generic quote. Look at the inverter and panel brands offered, whether they stock parts locally for repairs, and how they handle monitoring after installation so you can track performance and catch faults early. Get at least two or three quotes and compare the full scope, not just the headline price per kW.
How we score these 94 businesses
Our ranking weighs licensing and accreditation, the range and quality of equipment brands stocked, customer feedback specific to commercial jobs, and responsiveness to quotes and after-sales support. See the full ranked guide to solar energy equipment suppliers for the current order, and read our methodology for how each business is assessed.
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All commercial & industrial solar, ranked by score and relevance
We found 94 businesses offering commercial & industrial solar; 5 met the criteria for the scored directory. The order weighs each business's overall score by how much of its reviewed work is commercial & industrial solar, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
When you submit an enquiry through our forms, we may share it with partner providers who can do the work, and we may receive a referral fee. Our rankings and scores come from our published method only and are never affected by referral fees.
Common questions about commercial & industrial solar
- How much does a commercial solar system cost in Perth?
- It varies a lot with system size, but as a rough guide, commercial systems typically run somewhere between $1,000 and $1,500 per kW installed once you factor in three-phase inverters and any switchboard upgrades. A 100kW system might land anywhere from $100,000 to $150,000 before rebates, so get a site-specific quote rather than relying on a per-watt average.
- How long does a commercial solar installation take?
- Design and approvals (including Western Power network assessment for larger systems) can take several weeks to a few months, and the physical installation itself is usually completed within one to two weeks depending on system size and roof access.
- How do I judge the quality of a commercial solar supplier?
- Ask about their experience with systems of similar scale to yours, request references from past commercial clients, check they hold current CEC accreditation, and confirm what monitoring and maintenance support is included after handover. A supplier that pushes a fast sale without a proper site assessment is a red flag.
- How often does a commercial solar system need servicing?
- Most suppliers recommend a professional inspection every one to two years to check inverter performance, panel condition and electrical connections, though remote monitoring can flag many issues (like underperforming strings) between visits.
Guides to choosing commercial & industrial solar
- EOFY solar tax incentives for WA businesses: timing your purchase
How the financial year end affects commercial solar purchase decisions in WA, and what to ask your accountant before you commit.