Ac Side Wiring - Alpha ESS PWG2-50K User Manual

Cabinet and module need to be grounded reliably!
1) Use a multi-meter to measure the voltage of PV and battery port, and ensure that the voltage is within input
voltage range of Bi-directional Hybrid Storage Inverter.
2) Disconnect DC switch at previous level. Wiring operation can be conducted after using a multi-meter to measure
and confirm that there is no voltage between positive and negative poles of DC input.
3) Connect the positive pole of PV battery pack to "DC+" of DC input of Q1 switch.
4) Connect the negative pole of PV battery pack to "DC-" of DC input of Q1 switch.
5) Connect the positive pole of storage battery to "DC+" of DC input of Q2 switch.
6) Connect the negative pole of storage battery to "DC-" of DC input of Q2 switch.
7) Confirm wiring firmness.
Disconnect DC distribution isolation switch and ensure that there is no dangerous voltage in the system during wiring.
The positive and negative poles of batteries cannot be connected inversely. Before wiring, a multi-meter needs to be used for
measurement.

AC side wiring

4.6.5
1) Use a phase-sequence meter for measurement, and ensure that the phase consequence of wires should be a
positive consequence.
2) Disconnect distribution switch Q3 at back level in Bi-directional Hybrid Storage Inverter.
3) Use a multi-meter to measure and ensure that the cables connected to the terminals are electrically neutral.
4) During on-grid, A/B/C phases of AC distribution switch Q3 of power grid and PE are respectively connected to
A/B/C phases of power grid and PE.
If on/off-grid switching is to be achieved, extra power distribution unit and wires need to be added.
5) Confirm wiring firmness.
Ensure that there is no dangerous voltage at connection points during wiring.
Danger
Attention
Warning
Chapter IV Device Installation 15