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Strange current measurement with EM540

Hi,

my ESS system consists of two Multiplus II 3000 (230V) synchronized on a single phase (L1). A Carlo Gavazzi EM540 is connected as grid meter to the GX. Everythings works fine. But the EM540 returns strange current measurements that don't seem to make sense:

strange-current.png

The current on L1 always seems to be ~1A higher than expected - in the direction of the energy flow - although it's not exactly 1A. Examples: e.g. 230W *sent to* the grid: ~ -2A; 230W *drawn from* the grid: ~ 2A.

Am I missing something here? Does anyone have the same strange measurement?

Thank you any hint.


ESSem540
2 |3000

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