SolarBOS Launches New Current Sensing Combiner

SolarBOS has launched a new current sensing combiner system that can find applications in the solar industry. The combiner solution is available in 8, 12 and 16 circuit versions with voltage rating of both 600 VDC and 1000 VDC and current rating up to 250 ADC.

The combiners are listed to anti-islanding protection standard UL-1741 for voltage rating up to 1000 V DC. The design is yet to be patented. The current through the fuse holders is measured by means of tiny hall-effect sensors. The sensors facilitate the detection of circuits operating below par. The Modbus RS-485 serves as a means of communication for the current sensing combiners. The combiners are also capable of recording the temperature of the busbar. This feature is important for early detection of loose connections before it leads to issues in the combiner system. LEDs are built into the system to serve as indicators of “string-out”. The combiners are available in a variety of configurations, namely, with contactors, with disconnects as well as with voltage transducers and surge suppressors.

Pricing of the devices is yet to be fixed. However, the company pegs the selling price of a 16 circuit disconnect combiner of 250 A rating at less than $1000. The combiners with contactor configuration are capable of detecting series arcs in the array wiring and interrupting them. All the models will be exhibited by SolarBOS at InterSolar North America from July 10 to 12 at booth #8247.

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