Installing rooftop isolators is a requirement under AS/NZS 5033:2012. Rooftop isolators are required to ensure the safety of PV installations during maintenance and in emergency situations. However installing isolators correctly is essential if the full safety benefits are to be provided. This article clarifies the factors that installers need to consider when installing rooftop isolators.
Category: Technical Articles
To maintain our position as the preferred knowledge network for the industry and commerce of renewable energy innovation & technology, GSES communicates factual, up-to-date and evidence based information for publication. These include information on the issues surrounding DC circuit breakers, earthing fundamentals, how to sell solar, and information on isolator enclosures.
Sealing Roof Penetrations
Roof penetrations for PV systems are often the most difficult parts of installing a PV system, especially on tile roofs. Installations on tile roofs typically require grinding out the underside of numerous tiles for the mounting feet and then having to drill holes for cable entries, then to properly seal these holes can seem tedious […]
Oversizing PV Arrays
‘Array oversizing’ refers to solar photovoltaic (PV) systems that have been designed so that the solar array has a higher peak capacity than the inverter. A solar system of a given installed capacity under irradiance consistent with Standard Test Conditions, may actually deliver up to 20% less than the nameplate rating of the solar array. […]
Potential Induced Degradation (PID)
Potential Induced Degradation (PID) is a process that occurs in photovoltaic (PV) cells when the system has a negative potential relative to the ground. As a result, the PV module’s efficiency decreases over time. Although PID is a relatively new concept and is not widely understood, techniques already exist to minimise its undesirable effects. The […]