Chapter 4: Connecting The Ac And The Strings To The Inverter; Grid Connection Guidelines; Connecting The Ac Grid To The Inverter - SolarEdge Delta SE12.5K Installation Manual

28 Chapter 4: Connecting the AC and the Strings to the Inverter
Chapter 4: Connecting the AC and the Strings
to the Inverter
This chapter describes how to connect the inverter to the AC grid, and to the strings of
modules with power optimizers.

Grid Connection Guidelines

In most countries, three phase inverters require neutral connection at all times. In
some countries, the three phase inverters can be connected to delta grids; in other
cases, multiple single phase inverters can be used.
Prior to system installation, refer to:
Three Phase Inverters for Delta Grids application note at
https://www.solaredge.com/sites/default/files/se_three_phase_
inverters_for_delta_grids.pdf
Supported Countries application note to confirm compatibility at
http://www.solaredge.com/sites/default/files/se_inverters_
supported_countries.pdf; installing without confirmation may
void the inverter warranty.
For more wiring information refer to the SolarEdge Recommended AC Wiring
Application Note , available on the SolarEdge website at
http://www.solaredge.com/files/pdfs/application-note-recommended-wiring.pdf.
For recommended circuit breaker size per model refer to Determining the Circuit
Breaker Size on page 67
Connecting the AC Grid to the Inverter
Use a five-wire cable for three phase connection.The maximum wire size for the input
terminal blocks is 16 mm².
1. Turn OFF the AC circuit breaker.
2. Release the six Allen screws of the inverter cover and carefully move the cover
horizontally before lowering it.
Three Phase System MAN-01-00505-1.5