A PV Combiner Box is the indispensable part of solar photovoltaic (PV) systems, which combines output from several groups of series low-voltage DC strings to a high current bus bar and then creates an easy way for multiple strands/arrays on their route towards inverter. This in turn, simplifies the wiring between solar panels and inverters. In order to improve longevity and reliability of the PV system, called as overcurrent protection or external electrical surgesprotection features are equipped with standard fuses, SPDs(surge protect device) and disconnect switch into at a time combine all those summarised together namedPV Combiner Boxes.
PV Combiner Boxes, in terms of technical specifications are designed for handling particular current ratings and voltage limits. For example, a common combiner box might be rated for driving 1500 V or handling current between100 to400 A depending on model /system size. Additionally, boxes must be weather-resistant to IP (Ingress Protection) rating such as preferably 65 or 66 so that it can stand-up-to outdoor conditions like rain, dust and UV exposure for longer periods. Both of these features go a long way in ensuring the durability and longevity (over 20 years) which matches that of most solar systems.
PV system design, safety is still the primary concerns of builders and users alike; one key aspect in this regard is PV Combiner Box. For grid-tied solar system, it renders the electrical fault risks to minimal by placing a fuse in each string which will be disconnected if an overcurrent due to a fault occurs and hence saving any further harm of other parts. Combiner boxes are a crucial component of system management in large commercial systems and utility-scale installations. Larger boxes can take up to 32 input strings, which is a way for larger solar arrays — those in sunnier climes — like the utility-scale solar farms it wants to target. In addition, as the trend towards greater reliance on renewable energy sources continues and more commercial and residential installations use these systems, demand for PV Combiner Boxes is expected to grow 8% a year through 2021.
Download the spec sheetThe cost of a PV Combiner Box is varied and can range from as low $200 to about $1,000 depending on its capacity and features. While this upfront investment is advantageous to safeguard the solar array, reducing operational & maintenance costs and achieving optimal performance. With the world wide expansion of solar systems, their growing market demand for PV Combiner Boxes as essential to operate safe and stable.
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