Step 4 - Ground The System - APsystems QT2-220 User Manual

4. APsystems Microinverter System Installation
Install the microinverters (including DC and AC connectors) under the PV modules to avoid direct
exposure to rain, UV or other harmful weather events. Allow a minimum of 1.5 cm (3/4'') below and
above the casing of the microinverter to allow proper air flow. The racking must be properly grounded as
per local electrical code.
When flush-mounting photovoltaic modules on the rooftop, please reserve the DC connectors, antenna,
and LED indicator of the microinverter facing outwards to facilitate monitoring of indicator status and
ensure optimal communication quality.

4.3.4 Step 4 - Ground the system

There're 2 ways to ground the QT2-220 series microinverters.
1. By grounding washer attached.
After the microinverters and racking are reliably installed, the microinverter's grounding washer can connect to
the racking to ensure proper earthing.
2. By grounding copper wire.
Fix the grounding copper wire by the grounding lug.
Thoroughfare
grounding washer Warning
injure hand
APsystems Microinverter QT2-220 User Manual
grounding lug
10