![]() ![]() “But Superintendent Kingsland said if isolation switches were removed, alternative safeguards were required to protect firefighters and other first responders from the risk of electric shock. “Industry experts have been lobbying to make the isolator switch voluntary, with the Clean Energy Regulator saying it’s mandatory only in Australia… Unfortunately, though, the article only made one small suggestion, which was to make DC isolators optional: It’s great that the spotlight is finally shining on DC solar systems, especially at the cheaper end of the solar market. DC Solar Is In The SpotlightĪn article in the Sydney Morning Herald yesterday highlighted the increasing concern around solar panels fires. Standard solar systems that use a central inverter don’t have Rapid Shutdown functionality like an AC system, and ironically it is often the safety switch itself that is causing the fire. ![]() This switch isolates the electricity being generated by the solar panels. Once an arc fault is triggered, it can be difficult to stop because the voltage in DC systems is constant, and you have to be able to interrupt the circuit or the arcing will continue.Ī DC Arc fault typically occurs in a faulty DC isolator, a switch that is used in solar systems so that firefighters can turn off a system in the event of a fire. Even the smallest equipment failure, such as a damaged cable or a loose electrical connection can cause an arc fault. Solar systems that have high-voltage DC power running from the panels down to the inverter have to be closely monitored for arc faults, which pose a significant risk of fire. ![]()
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