Please see attached instructions video for needed upgrade steps. Ensure circuit is done according to schematics:
Note! Only trained electrician can perform the needed on-site upgrade.
Upgrade kit order codes:
EVSER-MIDKIT = Sales package includes ONE (1) pcs upgrade kit for EVF200: Delivery package contains 2x MID Energy Meter (type: EM340) and 1x Door (color white) with windows for energy meter readings
EVSER-MIDKIT5 = Sales package includes FIVE (5) pcs upgrade kit for EVF200: Delivery package contains 5x EVSER-MIDKIT
Please note, when Ensto Pro is already equipped with Energy meter, but it does not have door with only windows, then order code for only for the door is PZZ448.WC
Kit content:
After physical device installation also the controller configuration is needed. Instructions for USB memory stick configuration work:
By this method: USB stick configuration
With this file: 
Config_meter
Instructions video (contains also instructions how to verify correct energy meter data communication with the controller electronics board):
aviensto_evc_-_ensto_pro_(evf)_update_with_mid_energy_meters_720.mp4