Photovoltaic system protection

Protect the DC side of the PV system against overcurrent’s and overvoltages, install PV combiner boxes with fuses and surge protection devices!

Interest in renewable energy such as solar power is rapidly increasing, the industry for photovoltaic modules is growing at 30-40% per year. Rising energy prices has generated an increased interest also in Scandinavia.

A photovoltaic (PV) cell converts light into electrical current - DC. A PV module is an assembly comprising a number of interconnected PV cells. To be able to generate sufficient voltage, the PV modules are connected in series and form a string. A number of strings can then be connected in parallel, forming an array to achieve the desired output power. The PV modules should be protected against overcurrent and overvoltage.

Roof mounted PV modules does also affect how firefighter’s can operate in case of a fire. Swedish Fire Departments recommends increased safety measures, allowing the fireman to isolate the lines between PV modules and the inverter from the building access points.