OutBack Power
| Commissioning Document
©2019 OutBack | an EnerSys company
FA
-KF-10/
11
/2019
Page 2 of 12
Physical Installation
This section covers the physical installation requirements and best practices for a two-unit SkyBox
stack. Only those components that are affected by stacking will be discussed. Those that are not
affected, such as PV wiring or the temperature sensor wiring, are not covered. For specific details on
mounting each SkyBox, please refer to the Quick Start Guide.
Each SkyBox should have a clear space of 6” on both sides to ensure adequate airflow for cooling
and for ease of access to the Balance of System compartment (BOS). Figure 1 represents this.
Battery
Each SkyBox must have its own battery bank. Units cannot share the same battery bank as each
controls its own battery monitoring program.
Before mounting the Skyboxes, ensure enough room exists around each unit to accommodate its
battery bank.
CAUTION: Hazard to Equipment
Each SkyBox MUST have its own, separate battery. Damage can occur if a
battery is shared.
CAUTION: Hazard to Equipment
If battery banks must have different capacities, place the larger bank on
the master unit. Damage can occur if the master has a smaller capacity.
AC Input
Connect both units to the same AC source, whether the grid or a generator. See Figure 11 on
page 10 for further clarification. This may require the use of a bus bar. OutBack does not provide
general specifications on the size of this bus bar as it is site-specific.
Take the appropriate safety precautions when connecting the units to the AC source.
Figure 1 – Correct spacing
