Delta showcases commercial string PV inverters at Intersolar Europe

At this year’s Intersolar Europe, Delta will present two commercial string PV inverters and a cloud monitoring system.

The three-phase M125HV string inverter has 140kVA capacity and peak efficiency of 99.2 per cent and the compact, three-phase M70A string inverter has a capacity of 75kVA capacity and six MPP trackers. The cloud-based MyDeltaSolar monitoring solution manages solar arrays with Delta inverters.

The M125HV string inverter for ground-mounted solar arrays has maxim output power of 140kVA and an input voltage range from 860 to 1600V DC. It can accommodate up to 20 strings, via Amphenol connectors. String monitoring includes the measurement of the I-V curve at each individual string breaker, while remote control and monitoring options are via Fieldbus.

Type 2 surge protection devices is pre-installed on the input and output sides, and connection hardware for Type 1 is available.

The M125HV is suitable for use in large, MW-scale ground-mounted solar plants. According to Delta, it optimises electrical generation for photovoltaic (PV) systems with its peak efficiency of 99.2 per cent. The higher input voltage results in lower current, which allows for smaller cable diameters and reduces energy loss during operation. A cooling system constantly maintains ideal temperatures for the electronics with a combination of natural convection and fans to ensure air flows through the device and to prevent hotspots from forming inside the housing.

The inverter is in an aluminium housing with IP65 protection for the internal electronics. The terminal box has protection class II and robust screw terminals on the DC side. As there are no electrolytic capacitors, Delta claims that service life is over 20 years.

For ground-mounted and commercial rooftop arrays, the M70A three-phase string solar inverter has 75kVA maximum AC apparent power for ground-mounted and commercial rooftop systems. Its compact design and low weight make it easy to transport and install. The six MPP trackers, each with three pairs of connectors, give the system planner more flexibility when arranging the module strings, maximising yields, says Delta. With ground-mounted systems, module rows can be set up with minimal spacing. Potential shadowing can be compensated by smart allocation of the MPP trackers.

Even complex rooftop systems that have multiple sections with different alignments can be easily implemented using the M70A, says Delta. If two strings are attached per DC input, no external string breakers need to be installed.

MyDeltaSolar cloud-based monitoring works with all Delta inverters and allows operators and installers to set up and manage multiple plants and inverters. It is available for mobile devices and desktop PCs, with configurable email alerts for all important events. It is compatible with monitoring solutions of various third-party vendors and displays all major parameters of a plant broken down into individual strings or inverters, says Delta.

Visit Delta at Intersolar Europe 2019 (15 to 17 May, Munich) at Hall B2-450

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