Typically, PV combiner boxes are installed near the photovoltaic array (usually between panels and inverters) to keep cable runs short for minimal distance power loss. Installed close to the solar array, usually within just a few meters from it, this box collects output of multiple strings reducing DC cable runs to inverter and maintaining high electrical efficiency. Even a modest 10% reduction in cable length results in decreased power loss and better system performance.
The PV Combiner Box is always installed on outside, so environmental factors must provide; You need an enclosure with IP65 or higher ratings that will keep both a dust and moister away from equipment which is critical, especially when it comes to the temperature variations. A weatherproof box adds years to the life of a PV Combiner Box and must be used with each [outdoor] solar farm as well as most residences. In some high-humidity regions or where it will be exposed to lots of heavy rain, extra protection such as UV-resistant coatings can prolong the life of your torchlight.
The PV Combiner Box should also be placed in a convenient location for maintenance. Regular maintenance checks fuses, surge protection devices and the integrity of wiring offering a way to ensure uptime is maintained as well prolonging equipment longevity. Solar technicians suggest a clear height (1.5 meters) from the ground level so that it can be monitored and serviced conveniently as no special tools are required for servicing purposes. This also goes to show that in a commercial setting, as much 20% of maintenance efficiency can be gained simply by enabling easy access for inspections which are completed quickly.
In warm localities, the PV Combiner Box must be arranged under a shaded enclosure or some form of protective cover as extra heat creates thermal stress with an adversarial effect on box components. EX: In many climates, the related efficiency loss of heat can total 5%, so a shaded installation might directly or indirectly help performance as well as alleviate some common stress on surge protection and fuse components.
To achieve the best results and for a safe operation, placing PV Combiner Box adjacent to solar array at location low in risk, protection from sunlight is ideal option & it ensures maximum output efficiency, longer life of product along with less maintenance across all possible installation scenarios.