Preparing for the Installation
Preparing for the Installation
Ensure your local utility is consulted for any requirements for connecting to or returning power to the grid. Obtain all permits necessary to complete the installation. Consult your local and national electrical codes for more information.
Important: In this manual “wiring” and “wires” are used in reference to both AC and DC wiring/cabling and wires/cables.
WiringWire size and length will be determined by the location of each component and their relative distance to each other. Wire sizes may also be affected by whether or not conduit is used.
Important: Wire size should be based on the maximum power rating of the inverter. Ensure that wiring is not undersized. Undersized wiring can result in significant power losses and reduction in system efficiency.
AC Circuit Breaker RequirementsThe main utility service panel must dedicate a double pole breaker for each inverter installed. This breaker must be capable of handling the rated maximum output voltage and current of the inverter (see “Electrical Specifications” on page
Depending on the installation, external AC and/or DC disconnects may be required, and they may need to be in a location easily accessible to utility or fire personnel. Consult local codes and authorities for additional information.
WARNING: Shock hazard
Never connect or disconnect the PV modules from the GT Inverter under load (by pulling the PV quick connects before disconnecting the grid). Always disconnect the GT Inverter from the grid first.