Alpha ESS SMILE-G3-S5 Manual page 31

1. Mounting more batteries
You can install extra batteries up to 6 batteries in a system.
1) If the expansion batteries are installed downwards:
Attach the positioning paper plate to the first wall bracket, and mark the wall through
holes (A2 and A1) on the paper plate. Use a hammer drill (Φ10.0mm; length 20cm) to drill
holes in A1 and A2 with a depth of about 7cm and fix the wall bracket tightly to the wall
with expansion screws. Please repeat steps 8~9 to in-stall the expanded battery.
2) If the expansion batteries are installed upwards, inverting the positioning paper plate
and repeat the steps above.
3) Please use a level to ensure that the wall bracket is horizontal.
The batteries can be stacked up to three batteries per column. Keep the distance between
two columns of the batteries greater than 300mm. Expansion wiring please refer to
Chapter 7.8.