Fronius CL central inverters

Fronius CL central inverters

The Fronius CL central inverters (CL) has modular system architecture with up to 15 identical power modules contained in one central unit. Configurations of 9, 12, or 15 power modules are available for outputs ranging from 33.3 kW to 60 kW. With Fronius' MIX power module management, individual power modules can be automatically activated or disabled depending on solar conditions to achieve 3 separate efficiency peaks. The CL's wide DC input MPPT voltage range maximizes flexibility for system configuration. 

The CL's control unit automatically calculates which power modules will be turned on and off in partial load conditions by analyzing the respective operating hours of each unit. This helps to equalize the work load on individual power modules, increasing the service life of the inverter, and provides redundancy in the event of a fault in an individual power module. Individual power modules can be easily removed and replaced for quick servicing via the plug and play drawer design. Power modules can be temporarily removed prior to housing installation, reducing the weight of the housing so it is easier to move and install.

The CL has a NEMA3R enclosure with integrated AC and DC disconnects. An innovative ventilation design prevents dust and moisture from entering the power module area. For indoor installation there is an optional exhaust air guide, allowing the Fronius CL to vent the exhaust hot air to the outside. An integrated relay contact can also be used to control an external fan.

The CL is compatible with the Fronius DATCOM system for comprehensive system monitoring. A Fronius Com Card and a Signal Card are already integrated into the unit. Other components, such as the Fronius Datalogger, the Sensor Box, and environmental sensors, can be added at any time.

The Fronius CL central inverters series are Listed to UL 1741 for the U.S. and Canada. Dimensions (in inches) including optional 4-inch base: 72" H x 43.5" W x 28.5" D. The CL comes with a 5-year warranty.

Fronius String Control 250/25

The Fronius String Control 250/25 combiner and string monitor continually compares the string currents with one another, providing early detection of any problems in individual array strings. It can be used to combine up to 25 module strings with a total current of up to 250 A. The String Control's integrated fuse holder accommodates up to 20 A string fuses. The Fronius String Control 250/25 is compatible with all Fronius inverters and is particularly effective in combination with Fronius CL inverters. Dimensions (in inches): 26.8" H x 19.7" W x 16.7" D. Weight: 225 lbs.

Features:

• Operating temperatures of -13 °F to +122°F (-25 °C to +50°C)
• Proprietary MIX concept increases energy harvest in low light conditions
• Available in sizes from 33 to 60 kW
• Field configurable for either positive or negative ground PV arrays
• 10-year warranty, extendable up to 20 years
• Listed to UL 1741-2010 for U.S. and Canada
• Compliant with:
• IEEE 1547-2003
• IEEE 1547.1
• ANSI/IEEE C62.41
• FCC Part 15 A& B
• C22. 2 No. 107.1-01 (Sept. 2001)

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