How important do you think would a grid hookup be on European freight trains for reefers? It should be straight forward to include full wagon power with the up

How important do you think would a grid hookup be on European freight trains for reefers? It should be straight forward to include full wagon power with the upcoming DAC4EU coupling (UIC 552 says that normal coaches are to have an 800A through connection that's regularly fed with 1000V 16.7Hz or 1500V 50Hz; this is single-wire earth(/track)-return). Keep in mind that unlike North American freight trains, Europe mainline service is almost fully electrified. Thus the reefer would be grid-fed. I'm asking because I'm looking to propose a change to the current plans for the electric coupler (use near-field RF instead of the currently-preferred single-pair Ethernet or it's fallback powerline; I think 802.11 has suitable PHY options, especially among the OFDM codes if the near-field chamber is dispersive and/or has problematic resonances in the channel), and throwing in "grid power for reefers" with actual numbers from the reefer container industry would be easy (a change to the coupler is a change, and the additional cable through the wagon shouldn't be that extensive either if it's an economical aluminum type; also this would allow passenger coaches that are currently using the pre-DAC4EU hook and chain coupling to be used with DAC4EU rolling stock).