Many homeowners are unaware that a once-mandatory device, the DC isolator, could actually be endangering their solar system – and their homes. DC isolators, once required by Australian regulations, were supposed to offer an extra layer of protection. Ironically, they have become notorious for causing fires rather than preventing them. In fact, faulty DC isolators were linked to a 500% increase in rooftop fires in New South Wales alone in the three years leading up to early 2021. As a consequence of the dangers posed by DC isolator failure, the Australian Standard for solar system installations, AS/NZS 5033, was updated in late 2021. If your solar system still has one installed, now is the time to take action.
Solar isolators are no longer required equipment on household solar system installations (provided other safety measures are followed). At Brisbane Solar Repairs, our experts can safely remove these fire hazards, ensuring your system operates safely and efficiently.
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Why DC Isolators Have Become a Hazard
A DC isolator is a manual switch designed to cut off the direct current (DC) from a solar panel system. Installed between your solar panels and the inverter, it was meant to allow for quick disconnection in the event of an emergency or for maintenance purposes. However, they have been proven to be the largest single source of conventional DC solar system failures.
DC isolators were initially introduced to increase solar system safety, but over time, they’ve proven to be a significant fire hazard. Poor installation practices, combined with the harsh Australian climate, have caused many of these switches to fail. When exposed to water, dust, and UV damage, the devices can corrode and short-circuit, leading to fires.
Australia’s Push to Phase Out DC Isolators
The update to the solar installation standards in late 2021 signalled a clear move toward safer solar systems. If your solar panels were installed before this mandate, they likely still have a DC isolator—and the risks associated with it.
Whilst it’s still legal to use DC isolators on your system, why would you risk your investment (or even your home)? If you haven’t acted already, now is the time to bring your solar system up to date. At Brisbane Solar Repairs, our expert solar electricians can safely and professionally remove your outdated DC isolators. Don’t wait for a disaster to happen—take control of your solar system’s safety and performance today.
Concerned about the risks posed by your DC isolator? Call us now to schedule an inspection and take the first step toward a safer home. Contact Brisbane Solar Repairs today for a free consultation and safety assessment.
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