Eaton xStorage 400, Installation And Operation Manual

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2 Eaton xStorage 400 Installation and Operation Manual P-164001032—Rev 01
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The inverter system consists of two individual bi-directional inverters, referred to as Energy Conversion
Modules (ECMs), paralleled to each other, in order to provide the required power output to the load. The
inverters are designed to run in parallel with the incoming utility to the customer load. Under charging mode,
the inverter directs energy from the utility and charges the battery system. During high loading events, the
inverter converts DC energy from the battery to AC power to supplement the utility load.
The inverter system is housed in a metal frame with its associated power electronics, separate from the
battery system.
The inverter system also contains an input/output (IO) section which acts as a landing point for external power
and control connections as well as the battery connections. This section also contains control and monitoring
hardware to connect to Eaton’s PredictPulse dashboard and provide energy service control.
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Electrical energy storage is provided by the Samsung ® lithium-ion battery system. The battery system is
composed of 36 battery modules installed in four battery racks. The batteries are monitored and controlled by
the Samsung Battery Management System (BMS).
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The battery system and select portions of the inverter system are normally cooled by roof-mounted HVAC
units. For select systems located in areas subject to frequent temperatures below freezing, a cold weather kit
may be installed. Heaters are integrated into the roof-mounted HVAC units.
The HVAC units recirculate internal air to keep the internal equipment below the maximum value permitted by
the battery compartment temperature specifications detailed in paragraph
10.5 Environmental Specifications .
The HVAC cooling operation is expected during battery charging, battery discharging, and standby operation
with high ambient temperatures. The HVAC units are controlled by a common thermostat and controller
installed on the inner surface of a cabinet door.
The cold weather kit includes louvers, actuators, and sensors that cool the batteries using a portion of the
airstream from the inverter cooling system (described in paragraph
1.1.4 Inverter Cooling System ). When
outdoor temperatures fall below approximately -7°C (20°F), the cold weather kit will operate in lieu of the
rooftop HVAC units to keep the internal equipment below the maximum value permitted by the battery
compartment temperature specifications detailed in paragraph
10.5 Environmental Specifications . Cold
weather kit cooling operation is expected during battery charging and battery discharging with low ambient
temperatures.
Heaters are integrated into the HVAC units and keep the internal equipment above minimum value permitted
by the battery compartment temperature specifications detailed in paragraph
10.5 Environmental Specifications . Heater operation is expected during low ambient temperatures.
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The inverter system is cooled by filtered, unconditioned external air. External air is pulled from the front of the
cabinet, through the filters, blowers, and inlet plenum; this filtered air is then passed through the equipment
and exhausted through another set of filters located on the roof of the cabinet. Each of the two inverter
sections is cooled by a dedicated blower.
The inlet and outlet filters are designed to maintain the weathertight performance of the cabinet. The inlet
filters also serve to preclude the introduction of dust or debris into the equipment during cooling. An air
pressure sensor is included to provide early warning of a dirty or clogged inlet filter.
System Description