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Where a surge protective device is installed determines how much of the surge it actually intercepts. A correctly specified device placed in the wrong position provides far less protection than its datasheet suggests — and because the installation still looks compliant, the shortfall is rarely detected until equipment fails. This guide covers surge protective device […]

Certification requirements sit between a solar combiner box being technically suitable and being accepted. In practice, a box that meets every functional requirement can still be rejected at tender stage or on site because the documentation supporting its conformity does not match what the market expects. This is a documentation and compliance topic rather than […]

Most solar combiner box datasheets open with a table of ratings, and most buyers skim past it. That table is where the decision actually gets made. A combiner box is a passive enclosure — it does not protect anything by itself — so every number on its datasheet is either a limit you must stay […]

Photovoltaic systems fail in ways that are individually simple and collectively expensive. A DC arc that never clears. A fuse that blows on a cloudy morning. A surge that enters through the PV cable rather than the mains. Each of these sits on the DC side, and each traces back to a protection decision made […]

Selecting the wrong surge protective device type is one of the more common and more expensive specification errors in low-voltage installations. The device may work, the installation may pass inspection, and the system will still be under-protected for the actual risk it faces — because Type 1, Type 2, and Type 3 devices are not […]

Most problems found inside a PV combiner box a year after handover are not caused by the protection devices themselves. They come from how the enclosure was mounted, how the cables were glanded, how the terminals were tightened, and what was never verified before the strings were energised. This guide covers how to install a […]