The Kiwis are clever folk.Īnyway, after years of the industry trying and finally succeeding to get rid of the requirement for the blasted things, a new isolator shitstorm has brewed. While AS/NZS 5033 also applied across the ditch in New Zealand, NZ installations did not require rooftop isolators. Regardless of quality, it’s another reason why a professional solar system inspection every five years is a very good idea as this is one of the items that would be carefully checked 1.Īs far as I’m aware, Australia was the only country in the world that required their use. Water ingress has been a common problem and I think it would be safe to say half of fires involving solar systems have been caused by these isolators, which is rather ironic – and traumatic for affected households. Rooftop DC isolators were meant to be an added safety device, but they have been problematic particularly where poor-quality devices have been used. In November, many in Australia’s solar industry were rejoicing over the dropping of a requirement in the AS/NZS 5033 (Installation and safety requirements for photovoltaic (PV) arrays) standard that all solar system installations must include a rooftop DC isolatorĪ rooftop DC isolator is a manually operated switch installed adjacent to a solar panel array that stops the flow of DC current between the solar panels and the solar inverter when engaged. Solar installers and inverter manufacturers are tearing their hair out over a spanner thrown into the works relating to new inverter standards in Australia.
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