Transfer by Electrical contact
Transfer by magnetic induction
Electrics exposed to air
Electrics completely enclosed
Multiple mechanical contacts:
- adds unreliability
- bulky and costly
No electrical moving parts:
- completely reliable
- small, low cost
Safety risk:
- contact with electrics
- sparks ignite fire
Completely safe:
- no exposed electrics
- no sparking
Only usable indoors
- safety risk outside
- possible water ingress
Usable anywhere
- usable even underwater
- works even in wet conditions
Complex to manufacture
Simple, automated manufacture
Contacts corrode
No exposed metal to corrode
Only transfers single voltage
Can step voltage up or down
One connector per socket
Can add multiple connections to the same
Magnetic coupler with different voltages