{"id":77888,"date":"2023-08-29T11:00:44","date_gmt":"2023-08-29T01:30:44","guid":{"rendered":"https:\/\/www.solarquotes.com.au\/blog\/?p=77888"},"modified":"2023-12-28T09:02:49","modified_gmt":"2023-12-27T23:32:49","slug":"disconnection-point-vs-dc-isolator","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/disconnection-point-vs-dc-isolator\/","title":{"rendered":"Disconnection Points Vs DC Isolators: A Solar Inspector’s Experience"},"content":{"rendered":"

\"a<\/p>\n

Let’s shed some light on the ongoing debate between disconnection points and rooftop isolators; two critical aspects that have stirred discussions within the solar industry.<\/p>\n

As a Licenced Electrical Inspector, I’m here to look into the intriguing world of real-world solar installations in the Australian market. This is the first article in a monthly series.<\/p>\n

The Emergence Of DC Isolators<\/h2>\n

DC isolators caused quite a stir upon their introduction early last decade. Depending on who you talk to, either firefighters in Victoria played a significant role in advocating for them, or it was a typical “nanny state” decision.<\/p>\n

The idea is that in the event of a fire, the solar panel arrays on your roof could be safely switched off by anyone on the roof using the rooftop isolator – so they could be confident they would not be electrocuted as they battled the flames.<\/p>\n

DC isolators became mandated nationwide via the Australian Standard for solar installations: AS5033.<\/p>\n

As with any new technology, challenges arose, including concerns about workmanship, product quality, and the impact of UV exposure degrading the plastic isolators.<\/p>\n

The Rise And Fall Of Rooftop DC Isolators<\/h2>\n

Fast forward to late 2021, and an update to the 5033 standard meant – in many cases – rooftop DC isolators were no longer mandatory<\/a>. An alternative option in the latest standard is the disconnection point.<\/p>\n

A disconnection point is a connector that can be pulled apart, opening the DC circuit to the solar panel array, isolating it from the inverter.<\/p>\n

This development was generally well-received by installers, as it promised streamlined installations and reduced potential failure points.<\/p>\n

However, like any change, it also brought unique challenges, such as additional cabling requirements and restrictions on specific installation locations.<\/p>\n

Let’s now explore the pros and cons of each approach:<\/p>\n

Disconnection Points (DPs) Pros & Cons:<\/h2>\n

Pros:<\/strong><\/h3>\n

\u2705 Simplified installations: Disconnection points offer installers a more straightforward and efficient installation process.<\/p>\n

\u2705 Reduced potential failure points: With fewer components, the risk of failures due to faulty parts is minimized.<\/p>\n

\"disconnection

This is an image of a disconnection point with the correct labelling.<\/p><\/div>\n

Cons:<\/strong><\/h3>\n

\u274c Increased cabling requirements: Implementing disconnection points may necessitate additional cabling, which could complicate the installation process.<\/p>\n

These new measures aim to minimise the risk of cables falling if a ceiling collapses – which can happen in a house fire.<\/p>\n

Specifically:<\/p>\n