Omnik Omniksol-5KW-TH-TL3-NS User Manual page 21

CAUTION
The anti-backflow meter and current transformer (CT) should be installed
at the front end of the connection point between the inverter, all loads
and the grid (that is, close to the public power grid). The direction of the
current transformer (CT) is from the user side to the public power grid
side.
Definition and wiring of the anti-backflow meter terminal are shown below.
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