If a longer cable is required it can be extended using CAT5 Ethernet cable or why not consider using the myenergi harvi to connect the CT over wireless?.
myenergi CT Current Transformer Clamp, 100A 5m CT100-16-05 UU2601
myenergi CT100-24-05 Current transformer with 5m cable (100A 24mm)
myenergi harvi 65a3p - wireless power sensor (wallbox accessories for myenergi)
myenergi hub + app web connection (wallbox accessories for myenergi)
Ignition Voltage Transformer Module 0001500258 for Mercedes CL600 CL65 S600
