STANDARD OPERATING PROCEDURE
String Inverter Installation – Zeverlution Series
Version 1.2 Effective date 02/08/2017
Page 11 of 15
An AC isolator must be installed adjacent to the inverter if the inverter is more than 3 meters away
from the switchboard or it is out of line of sight. The AC isolator must have a current rating equal to
or greater than the MCB current rating.
MCB’s must be sized correctly according to the cable cross section used to connect the inverter
to the switch board. Please refer to the inverter datasheet or sections 5.2.1 and 5.2.2 to determine
the appropriate MCB rating.
SYSTEM COMMISSIONING
Commissioning Tests
It is extremely important that all mandatory tests are done before commissioning the PV system.
Please make yourself familiar with Appendix D of AS/NZS 5033:2014 and follow the instructions
outlined in the standard.
Attached to this document you’ll find a commissioning sheet which you may use to record the test
results. A completed and signed copy of the commissioning sheet together with the CCSC must
be provided to solarcity.
Grid Protection Settings
AS4777.2:2015 defines specific grid protection requirements for New Zealand. Before
commissioning the PV system, you must ensure that the inverter is set to the correct standard.
6.2.1
Adjusting grid protection settings using the inverter display
To change these settings, the inverter must be powered by DC only.
Keep in mind that the inverters need a minimum DC input power of 30Watts from the array to start
up. If the irradiance is insufficient in the late evening, you might not be able to access the inverters
settings menu.
1.
With the AC isolator turned off, turn on the DC
isolator(s) and wait for the inverter to start. This
may take a few seconds. The display will show an
error code.
