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6.2 Chassis Grounding
In this section, “Chassis Ground” is referred to as “ground” or “grounding” unless otherwise mentioned.
The PCS cabinet is shipped with ungrounded DC power terminals within the inverter. When terminated to the
batteries, the DC bus is configured for DC negative to ground.
AC Grid Earthing System: The AC power grounding is achieved through the PE terminals of the AC grid connectors
on the AC Filter Board, as shown in section 6.1. The PCS is configured by default for a TN earthing system.
Note: The field ground wire rating applies to the AC circuit only
. The DC source loop is internal to the battery
cabinet, and is rated accordingly.
DC ground fault monitoring: The Evolve BESS provides integrated DC earth fault monitoring, and provides
indication on the PCS panel as shown in section 12.2.
Lightning Grounding: The inverter has built-in lightning protection. In order for the lightning protection to be
effective, the grounding for lightning currents must be provided via low impedance path from the PCS PE terminal
to the building Ground/Earthing point.
7 Energy meter installation
The energy management system’s solar self-consumption algorithm requires the connection of an energy meter at
the customer’s main electrical panel. The meter must be installed and configured according to the electrical service;
either single phase or three phase. The information covered in this guide is generic to the approved list of
integrated energy meters that are supported by the home storage system at the time of your purchase. Refer to
the energy meter manufacturer’s installation manual supplied with your system for full installation details and
safety information.
Note: Refer to Appendix B for wiring diagrams specific to the manufacturer and model of the energy
meter supplied with your system.
The energy meter is supplied inside the PCS cabinet. It can be relocated within or adjacent to the main electrical
panel to simplify the current and voltage wiring. Energy meters supplied with the home storage system are DIN
rail mounted. Use existing DIN rail space within the electrical panel, or add DIN rail as required.
7.1 Electrical connections – voltage measurement / power supply
The energy meter provided is line powered from the electrical service. An in-line fuse, rated 1 Amp / 250 VAC, is
required on the voltage line input to the meter. For three phase service, fuses are required on the V1, V2, and V3
input terminals. The voltage inputs can be connected anywhere on the customer side of the main service disconnect
breaker. For three phase systems, phase rotation is automatically configured by the meter.
7.2 CT (current transformer) connections
Note: Observe the current flow direction of the CT. The direction of flow must be away from the utility
meter. For three phase systems, phase rotation is automatically configured by the meter.
CAUTION! Handle CTs with care. Always terminate the CTs at the meter inputs prior to clamping the
core onto a hot wire.
Summary of Contents for Evolve ESS AU 13
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