3 Commissioning
Before starting with the commissioning of the ZERO export controller all safety precautions must be
taken which apply to the rules in your country and general safety rules. Never work on a system with
a running generator or connected grid and short the output of the generator (when available) before
working on the power system.
Only a few settings are needed to commission the ZERO export controller.
Most important is the settings of the current transformer and the minimum setpoint of the
generator.
3.1 First time power on
Follow the following steps when the system is first time being powered.
Switch of the PV inverter, disconnect the PV inverter from the system and start the controller
by applying power to L1 and N in case you use a single-phase system or L1, L2 and L3 with N
for three phase systems. When the ZERO export unit is working properly, the LED is blinking
green.
Connect to the embedded webserver by typing the default address 192.168.1.100 in a web
browser.
On the Menu select Settings to adjust the CT ratio. The CT ratio is defined as 1: value. For
example, when you have a CT 5:200 the value is 40.
When the CT ratio is changed the power readings on the overview page should match the
actual power. A positive value is consumption from the grid, a negative value means
exporting to the grid. When this is not correct, check the wiring of K and L of the CT.
Switch on the DC side of the PV system to commission the PV inverters. The steps to add an
inverter to the system is explained on page 7.
