Commercial & Industrial Solar in Perth Metropolitan
A buyer's guide to commercial and industrial solar installers in Perth Metropolitan, with 51 suppliers compared and what to check before you sign a contract.
Commercial and industrial solar covers systems built for businesses rather than households: rooftop arrays on warehouses and factories, ground mounts on larger sites, carport structures over car parks, and the three-phase inverters, switchboards and monitoring gear needed to run them safely alongside heavy daytime loads. In Perth Metropolitan, where sites range from small retail units to large logistics sheds, the right setup depends on your roof structure, your electricity usage pattern, and whether you're chasing bill savings, demand charge reduction, or a sustainability target for tenants or shareholders.
Sorting through 51 suppliers in this category means looking past the glossy brochure. Check that a company holds Clean Energy Council accreditation for design and install, that they can show you a switchboard and structural assessment before quoting (not just a satellite-image estimate), and that they use inverters and panels backed by manufacturers with a local service presence, since a 10-15 year warranty is worthless if the maker has left the market. Ask for references from businesses with a similar roof type or load profile to yours, and get a clear breakdown of cabling, switchboard upgrades, and any council or Western Power approvals included in the price.
Our rankings weigh licensing, product brands used, project scale experience, and how suppliers handle documentation and after-sales support. See the full comparison in our ranked guide to solar energy equipment suppliers, and read how we score providers on our methodology page.
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All commercial & industrial solar, ranked by score and relevance
51 businesses. 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 a quote or contact form here, we may share your enquiry with partner providers who can do the work, and we may receive a referral fee for that. Our rankings and scores are based only on our published methodology and are not affected by referral fees.
Common questions about commercial & industrial solar
- How much does commercial solar cost in Perth?
- Costs vary widely by system size and site complexity, but businesses typically budget on a per-kilowatt basis, with larger systems (100kW+) usually costing less per kW than small residential-scale jobs due to economies of scale. Get at least three itemised quotes covering panels, inverters, mounting, switchboard work and any Western Power network approvals, since these line items explain most of the price spread between suppliers.
- How often does a commercial solar system need servicing?
- Most suppliers recommend an inspection at least once a year, checking panel condition, inverter performance, cabling, and rooftop fixings, plus cleaning if the site collects dust or is near industrial activity. Systems with performance monitoring can flag output drops between visits, which is worth asking about at quoting stage.
- What should a business expect during the installation process?
- Expect a site visit and structural or switchboard assessment before any contract, a design that accounts for your roof orientation and shading, then a scheduled install that may need to work around business hours to avoid disrupting operations. Approvals through Western Power and any council permits are usually handled by the installer but confirm this is included.
- How can I judge the quality of a solar installer before signing a contract?
- Confirm Clean Energy Council accreditation, ask what brands of panels and inverters they install and why, and request references from projects of a similar size to yours. A supplier who wants to inspect your site and switchboard before quoting is generally more reliable than one who prices from an aerial photo alone.
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.