Innovative combiner boxes for floating PV systems

Innovative combiner boxes for floating PV systems

The lack of land requires the development of new locations for PV systems. In this case, water surfaces are particularly suitable because of the low shading and the cooling effect of the water. However, the ambient conditions place high demands on the generator connection boxes.

Our PV DC Floating Combiner Boxes are designed for use in floating PV systems on freshwater surfaces and equipped with central inverters. They comply with IEC-61439 (ed. 2) and withstand high humidity, corrosive atmosphere and exposure to sunlight. We offer a wide range of plug & play variants from 8 to 24 inputs - with comprehensive protection and suitable covering solutions.

Collect, protect and monitor DC strings of floating PV systems

Collect, protect and monitor DC strings of floating PV systems

Collect, protect and monitor DC strings of floating PV systems

In floating photovoltaic plants, generator connection boxes need to withstand the high demands caused by high humidity and direct sunlight. Our PV floating DC combiner boxes are the perfect solution for long term efficiency.

Your benefits at a glance

Whitstands high humidity

Whitstands high humidity

Suitable for environments with high humidity according to IEC-61439-ed-2.

Resistent to sunlight

Resistent to sunlight

Can be operated in direct sunlight without additional sunshade.

Outstanding thermal performance

Outstanding thermal performance

PMMA cover for better reflection of solar radiation and to increase thermal performance.

Easy installation

Easy installation

Plug-and-play solution for quick, easy and flexible installation

5 years warranty

5 years warranty

We increase the warranty period due to the high quality of our combiner boxes

Product highlights

Absorbing PMMA sunshade

Absorbing PMMA sunshade

Absorbing PMMA sunshade

The specially developed PMMA sunshade absorbs incident solar radiation and heat. Its glazed polymer surface increases the reflection index and efficiently deflects the incident radiation. This very effectively reduces the temperature inside the combiner box.

Ensured ventilation

Ensured ventilation

Ensured ventilation

An air gap between the door housing and the PMMA cover ensures constant air convection. In this way, the combiner box and its components are reliably cooled.

Reliable sealing function

Reliable sealing function

Reliable sealing function

The PMMA cover is fixed to the enclosure door with stainless steel blind rivets. The rivets are located outside the area of the door seal, so that the sealing function according to IP65 is reliably guaranteed at all times.

Optimum watertightness

Optimum watertightness

Optimum watertightness

Multivia cable glands ensure optimum watertightness. They reduce the number of mechanical parts and make the entire construction more robust.

String monitoring with Transclinic Product innovation

Inside our PV Floating DC Combiner Boxes the Transclinic xi+ series continuously monitors the power from single strings or groups of strings as well as the voltage of a Photovoltaic system and thereby permits detailed monitoring of the system. Negative influences, which lead to reduced output, can be detected immediately allowing rapid repairs or adjustments to be made to the system.

String monitoring with Transclinic
Special features:
  • Various monitoring options - As standard, single strings with up to 16 inputs and a maximum Isc of 10 A per input can be monitored. For monitoring solutions of more than 16 inputs, double line monitoring is possible.
  • Efficient double line monitoring - With double line monitoring, two lines can be monitored via one channel. This reduces the number of connections required, the amount of components in the enclosure, the size of the control cabinet and thus also the costs. The maximum Isc per channel is 25 A.
  • Reduction of maintenance costs - All wiring is done with PUSH-IN connectors. There is no need to check the torque as required with screw connections. No further connection testing is necessary during the entire service life of the system.
  • Reliable even under extreme conditions - Transclinic 16i+ 1k5 H allows the measurement of 25 A per input even at 70 °C with an accuracy of ±1% (voltage/current). This helps pair monitoring in combiner boxes in difficult environments by using only one string monitor and optimising the cost of the solution.
  • RS485 SPD on board - A specific overvoltage protection for RS485 interfaces is already integrated to increase robustness and reliability of the device throughout its operational lifetime.

Trust in approved quality

Trust in approved quality

Trust in approved quality

Our laboratory ensures the highest product quality

Our laboratory is accredited according to international standards. It operates independently and is recognised by institutions, registration services, and other institutions and authorities. As a member of the CTDP program, Weidmüller is regularly audited by UL, especially about test methods, quality management and documentation.

PV Floating DC combiner boxes are tested according to IEC-61439-ed-2 and are constructed on the basis of the test results as well as assembled for the specific application. This ensures that each of the requirements of the target application is fully met.

Floating Solar Installations - Request your free white paper

Learn more on what to considerate when it comes to conditions, market development and financial aspects.

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