Fronius Inverter CL 36 WYE 277V 36kW Review
Configurations of 9, 12, or 15 power modules are available for outputs ranging from 33.3kW to 60kW. Using Fronius‘ MIX power module management, individual power modules can be automatically activated or disabled depending on solar conditions; combined with automatic transformer switching, this allows the Fronius CL to achieve three separate efficiency peaks. The CL’s wide DC input MPPT voltage range provides high flexibility for system configuration.
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The Fronius CL 36 WYE Inverter control unit automatically calculates how many power modules, and which ones, 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. It also provides redundancy, ensuring that the inverter remains operating even when there is a fault in an individual power module. If service is required, individual power modules can be removed and replaced easily via the plug and play drawer design. This ensures the highest serviceability and quick repair times. Another advantage of the modular design is that power modules can be removed for housing installation, reducing the weight of the housing and making it easier to move and install.
The Fronius CL has a NEMA 3R enclosure, with integrated AC and DC disconnects. An innovative ventilation design eliminates dust and moisture from getting into the power module area. For indoor installation there is an optional exhaust air guide, allowing the Fronius CL to channel the exhaust air to the outside. An integrated relay contact can also be used to control an external fan.
The CL is 100% compatible with the Fronius DATCOM system for comprehensive system monitoring. A Fronius Com Card and a Signal Card are already integrated in to the unit. Other components such as the Fronius Datalogger, the Sensor Box and environmental sensors can be added at any time.
CSA Listed to UL 1741 for the U.S. and Canada. Dimensions (in inches) including base (4-inch and optional): 72 H x 43.5 W x 28.5D The CL comes with a 10-year warranty.
Unique System design with the Fronius MIXTM concept
Nine power modules operate in the Fronius CL 36.0 accomplishing something great together. This combination of several power modules has many advantages: maximum earnings in partial load ranges, high system stability, long service life and easy servicing.
Highest partial load efficiency.
Nine identical power modules divide up the work in the MIX™ concept. The individual power racks are turned off and on automatically depending on the insolation power. This ensures that the load is optimized and yield is always at maximum – even while raining, when cloudy or at dusk.
Unsurpassed reliability.
The Fronius CL creates a redundant system because it integrates several smaller power modules that work together. If one power module should fail, the others simply take up the slack. In comparison: when the power module fails in monolithic systems, the entire system stops operating and this leads to considerable loss of earnings. The Fronius MIX™ concept ensures that the inverter remains in operation even when there is a defect in a power module and this helps to lock in your earnings.
Long service life.
The control unit automatically calculates which power racks and how many will be turned on and off in partial load operation using the respective operating hours of the power modules. This helps to equalize the work load on the PC boards. This also decreases the operating hours of the individual power modules thus increasing the service life of the inverter.
Fast service option.
When service is required, power modules can be removed and replaced easily via the plug & play principle and drawer design. This ensures the highest serviceability and the fastest reaction times on the market.
Simple planning, easy installation.
The Fronius CL was designed with practicality in mind. It can be used for many different assignments due to its planning flexibility. It is also easy to set up due to numerous design details that make installation and connection as simple as possible.
Wide input voltage range.
Different module configurations are possible: The wide input voltage range ensures high flexibility for system configuration.
Integrated grounding option.
The Fronius CL is well-equipped should modules have to be grounded whether positive or negative. Simply change two wires and a software paramater to change from negative to positive grounding.
Optional exhaust air guide.
If the Fronius CL is set up in a closed area, the exhaust air can be channeled out of the space using a connected pipe to prevent extreme heating of the ambient air. An integrated relay contact can also be used to control an external fan that draws the air to the outside.
Low installation height.
The Fronius CL can also fit into shallow spaces due to its low 72 inch height (with base). This compact design is achieved by its three-row arrangement of power modules in the inverter.
Low installation weight.
The power racks can simply be removed for installation. This reduces the weight of the Fronius CL and makes the housing easier to move. The racks can then be re-inserted and the inverter can begin operation immediately.
Generous connection area.
Sufficient space is available for connections and cabling with large cable cross sections. This makes installation simpler and much easier.
High-yield power
The Fronius CL was designed for continual high performance. The clever combination of automatic transformer switching, the precise Fronius Module Manager, the innovative ventilation concept and the advantages of the high frequency transformer technology make it one of the highest yield inverters of its class.
Automatic transformer switching.
The Fronius CL provides constant, high efficiency over the entire input voltage range. This is because Fronius inverters have three efficiency peaks due to automatic transformer switching. In comparison: Devices without transformer switching only have one efficiency peak. The efficiency then decreases steadily with an increasing input voltage.
Exact MPP tracking.
The Fronius Module Manager always finds the exact maximum power point (MPP). This is true even with the more demanding thin-layer modules. Overall, the Fronius Module Manager is able to achieve an outstanding MPP adaptation efficiency of 99.9%. This ensures that the maximum yield is obtained from every ray of light.
High-frequency transformer technology.
High performance with low weight and a compact design: The use of proven high-frequency transformer technology produces excellent performance results. The Fronius CL uses galvanic isolation, which meets the strictest safety standards worldwide.
Intelligent Cooling
An innovative ventilation design eliminates dust and moisture from getting into the power module area. The air required for cooling is drawn in by two fans on the front of the device and passed through a closed channel through the individual power racks. The PC boards never come into contact with the outside air. Inside the hermetically sealed power module, a smaller fan ensures uniform cooling. This sophisticated system increases the operational reliability and the service life of the inverter.
Specifications:
♦Weight 661
♦AC output volts 277VAC
♦CEC efficiency 95.5%
♦Watts 5000 watts
♦AC out volts/hertz 480V/60Hz
♦Maximum AC output watts 4500W / 5000W
♦Maximum DC voltage 600 volts
♦CEC efficiency 208/240 94.5% / 95%
♦Max DC array voltage 475 volts
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