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Alpha ESS Co., Ltd.
Page 34 of 69
Your Smart Energy
7.4
AC Connection
7.4.1
Conditions for the AC Connection
AC breakers must be installed on the AC side of the SMILE-B3-PLUS to ensure that
the system can be safely disconnected from the power grid and the load.
DANGER
Danger to life due to fire!
You must protect each SMILE-B3-PLUS with an individual AC circuit breaker in order
to ensure that the system can be disconnected safely.
Do not connect loads between the SMILE-B3-PLUS and the grid breaker.
No consumer load should be applied between the AC circuit breaker and SMILE-B3-
PLUS. Use dedicated circuit breakers with load switch functionality for load switching.
The selection of the AC circuit breaker rating depends on the wiring design (wire
cross section area), cable type, wiring method, ambient temperature, inverter current
rating, etc. Derating of the AC circuit breaker rating may be necessary due to self-
heating or if exposed to heat.
The maximum AC current of SMILE-B3-PLUS can be found in the following table.
We recommend the following AC circuit breaker for AC connection.
Description
Max Current
Recommend AC Circuit Breaker Rating
Grid side
26A
40A
Backup side
13A
25A
7.4.2
Grid and Backup Connection
There are two AC terminal blocks for grid and backup connection which have the
same installation steps.
We recommend the following cable requirements for AC connection.
Description
Value
Cable diameter
9-16 mm
Copper conductor cross section area range
4~6 mm
2
Stripping length of the insulated conductors
10~12 mm
1.
Take out the cord end terminals and AC connection cover provided by the inverter.
2.
Dismantle the AC cable by 80 mm, and strip the insulation of L, N and PE conduc-
tors by 10 mm.
