As a follow up to this post, I might ask to check the following 3 nodes at your ESS system.
The 3 Victron nodes display the power value of ESS Out in their status line.
L1 and L3 are same or similar to Venus dashboard, while L2 always shows a big difference.
Here is flow and display of my system
[{"id":"26b622eddc3234c6","type":"tab","label":"Flow 1","disabled":false,"info":"","env":[]},{"id":"ea0642e65ee3c02f","type":"victron-input-vebus","z":"26b622eddc3234c6","service":"com.victronenergy.vebus/276","path":"/Ac/Out/L1/P","serviceObj":{"service":"com.victronenergy.vebus/276","name":"MultiPlus-II 48/5000/70-50"},"pathObj":{"path":"/Ac/Out/L1/P","type":"float","name":"Output power phase 1 (W)"},"initial":"","name":"ACOut1","onlyChanges":false,"roundValues":"no","x":450,"y":280,"wires":[[]]},{"id":"dcc4494d21e05a16","type":"victron-input-vebus","z":"26b622eddc3234c6","service":"com.victronenergy.vebus/276","path":"/Ac/Out/L2/P","serviceObj":{"service":"com.victronenergy.vebus/276","name":"MultiPlus-II 48/5000/70-50"},"pathObj":{"path":"/Ac/Out/L2/P","type":"float","name":"Output power phase 2 (W)"},"initial":"","name":"ACOut2","onlyChanges":false,"roundValues":"no","x":450,"y":340,"wires":[[]]},{"id":"10de287422ee3c8d","type":"victron-input-vebus","z":"26b622eddc3234c6","service":"com.victronenergy.vebus/276","path":"/Ac/Out/L3/P","serviceObj":{"service":"com.victronenergy.vebus/276","name":"MultiPlus-II 48/5000/70-50"},"pathObj":{"path":"/Ac/Out/L3/P","type":"float","name":"Output power phase 3 (W)"},"initial":"","name":"ACOut3","onlyChanges":false,"roundValues":"no","x":450,"y":400,"wires":[[]]}]
Edit: Here is another screen output. L2 again wrong. Left image is correct and identical with my AC current clamp. All calculations based on L2 by NodeRed including the total power gauge are wrong as a result of wrong L2.
