Regarding the emonVS-PSU in North America (both the currently-available 1-input version, and the likely future version with two inputs for split-phase voltage): my understanding is that the CM choke and filter are there to meet EMC standards. I asked about it and Glyn replied here. Earlier in the same conversation, Trystan attached the test results showing the EN standards met.
My question now is, are these components necessary in a US configuration of the emonVS-PSU?
Do they have any impact on the accuracy or function of the emonVS-PSU, or are they there exclusively to meet EMC standards? (Since there is a CM choke and filter both before and after the PSU in the current configuration, my question applies to all four compenents.)