Ac Connection; Requirements For The Ac Connection - Alpha ESS SMILE-G3-S3.6 Installation, Operation & Maintenance Manual

6.3. AC Connection

6.3.1. Requirements for the AC Connection

AC cable requirements as follows:
☐ Conductor type: copper wire (tinned-copper preferred)
☐ Current carrying capacity:
AC Supply 21.7A + Backup (total up to 43.4A)
Backup Output: 21.7A
Note: Account for temperature de-rating and voltage drop/rise when selecting wire di-
ameters. 110°C or higher de-rates slower as temperatures increase (ref AS3008)
☐ Insulation stripping length: 10 mm
☐ Sheath stripping length: 50 mm
Residual-current monitoring unit:
The inverter does not require an external residual-current device when operating.
If local regulations or a particular installation configuration requires the use of a
residual-current device, the following must be observed:
The inverter is compatible with type A residual-current devices with a rated residual
current of 100 mA or higher. Each inverter in the system must be connected to the
utility grid via a separate residual-current device.
You must protect each inverter with an individual grid/backup circuit breaker in
order to ensure that the inverter can be disconnected safely.
For Australia and New Zealand installation sites, the neutral cable of the ac grid
supply to the battery and the Neutral on the backup circuit must be connected
together for the backup output to operate.
Selecting Circuit Breakers for the AC supply and Backup output is dependent on the
maximum current of the backup circuit and the inverter (if it force-charged), the model
of MCBs used and their de-rated current rating considering their maximum tempera-
tures. Supplier Datasheets detail temperature derating for their MCBs. Ensure MCBs
used are appropriate for the current and the operating temperature.
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