APsystems QS1A Installation/User Manual
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1. Important Safety Instructions
This manual contains important instructions to follow during installation and maintenance of
the APsystems Photovoltaic Grid-connected Inverter (Microinverter). To reduce the risk of
electrical shock and ensure the safe installation and operation of the APsystems Microinverter,
the following symbols appear throughout this document to indicate dangerous conditions
and important safety instructions. Specifications are subject to change without notice -
please ensure you are using the most recent update found at
This symbol indicates a situation where not following instructions may cause a serious
hardware or safety issue and/or put people in danger. Be extremely cautious when
performing this task.
T
This symbol provides important indication to follow in order to optimize microninverters
operations. Follow these instructions closely.
1.1 Safety Instructions
Do NOT disconnect the PV module from the APsystems Microinverter without first
disconnecting the AC power.
Only qualified professionals should install and/or replace APsystems Microinverters.
Perform all electrical installations in accordance with local electrical codes.
Before installing or using the APsystems Microinverter, please read all instructions and
warning notices in the technical documents and on the APsystems Microinverter system
and the solar-array.
Be aware that the case of the APsystems Microinverter is the heat sink and can reach a
temperature of 80°C. To reduce risk of burns, do not touch the case of the Microinverter.
Do NOT attempt to repair the APsystems Microinverter. If it fails, contact APsystems
Customer Support to obtain an RMA number and start the replacement process.
Damaging or opening the APsystems Microinverter will void the warranty.
Caution!
The external protective earthing conductor is connected to the inverter protective
earthing terminal through AC connector. When connecting, connect the AC connector
first to ensure the inverter earthing then do the DC connections. When disconnecting
disconnect the AC by opening the branch circuit breaker first but maintain the protective
earthing conductor in the branch circuit breaker connect to the inverter ,then disconnect
the DC inputs.
Please install AC breakers on the AC side of the inverter.
CAUTION – Hot surfaces - To reduce the risk of burns - Do not touch. Risk of electric
shock-(a) both ac and dc voltage source are terminated inside this equipment. Each
circuit must be individually disconnected before servicing, and (b) When the photovoltaic
array is exposed to light, it supplies a dc voltage to this equipment. Warranty void if cover
removed. No user serviceable parts inside.Refer servicing to qualified service personnel.
This inverter has an integral ground-fault detector / interrupter (GFDI). This
Utility-InteractiveInverter contains active anti-islanding protection(IEEE1547) and is
tested per FCC/IC.
