EO Charging CT clamp is suitable for use with the EO Mini Pro 3 and Genius 2 ranges. The CT clamp will monitor the total load (amps) going through your home. If the current clamp detects that the load is close to exceeding the maximum the house is able to handle, then the charge rate on your charger will be reduced to compensate. This unit is used for load management and is suitable for use with 100A AC inputs.