Wiring and connecting solar and batteries is electrical contracting in WA, licensed by the Electrical Licensing Board, and your EC number has to be conspicuous in advertising, a website included. Our Perth electricians page covers Building and Energy's guideline on that, and our solar installers page explains SAA accreditation and the federal battery discount. What makes Perth different is the grid. Homes across the metropolitan area are on the South West Interconnected System, running on Western Power's network, which reaches north to Kalbarri, east to Kalgoorlie and south to Albany. Households using 50 MWh a year or less are non-contestable customers, so their retailer is Synergy. That's why Synergy's platform, its Supported Solutions List and its commissioning process come up in almost every residential job, and why a Perth solar site can explain one set of rules rather than several.
Those rules changed on 1 May 2026. New or upgraded systems up to 30 kVA, which covers most homes, must use inverters set to Australian Region B under AS/NZS 4777.2, be capable of remote disconnection and reconnection, and pass capability testing at installation, unless the customer takes the fixed 1.5 kW export limit instead. The retailer nominates the technical solution, and Synergy uses the CSIP-AUS communications standard. If a connected system loses its internet link it drops to a lower static export limit until the link returns, without penalty, and Energy Policy WA notes that keeping the equipment connected is the customer's job, and a common fix is reconnecting it to the home Wi-Fi router. A short help page for customers who have changed their modem or internet provider will save calls. Inverters replaced under warranty with a similar or exact model are exempt, and installers still lodge connection applications with Western Power. This builds on Emergency Solar Management, which has applied to new and upgraded systems of 5 kVA or less since 14 February 2022 and which Western Power expected to be used only a few times a year for a few hours.
The WA Residential Battery Scheme also shapes how a Perth installer should present itself. The number of rebates rose from 20,000 to 100,000 once the federal program began. Synergy-area retailers must register with Synergy under its Installation Handbook, installations face safety compliance audits after the rebate and loan funds are paid, and fitting a battery or gateway that isn't on the Supported Solutions List can leave the customer ineligible, with repeat cases putting Approved Vendor status at risk. The federal discount has changed too: the Clean Energy Regulator's certificate factor fell on 1 May 2026, is applied at a lower rate above 14 kWh, and steps down at set points out to 2030. Both programs move, so we date each figure on the page and link to the government's pages rather than printing a combined total.
Perth's metropolitan region takes in 30 local government areas, from Wanneroo and Joondalup in the north to Rockingham and Kwinana in the south, with Kalamunda and Mundaring in the hills. A service-area section that lists where you install, and separately where you'll go for servicing or warranty calls, helps buyers from the outer growth suburbs. If you also take jobs in regional towns supplied by Horizon Power, those customers have a different retailer, different technical requirements and a higher maximum battery rebate, up to $3,800, so they need their own section rather than a footnote.
We're a web design team at Ste 3/110 Hutt St, Adelaide, working with WA businesses by phone and email. We haven't built a site for a solar or battery company, or for any WA business yet, and our current clients are in SA, NSW, VIC and QLD. The pages described here are assembled from parts we've already built for other clients: multi-step quote forms, file uploads, service-area pages, FAQs and tap-to-call.