This is a TWEAK for Midnite Solar Classic Charge controllers to limit charge current. This can be useful in an over paneling situation where the charger charges full amps most of the time and is running hot. I have found at 24v and 92 amps charging for long periods of time, the FETs get very hot and the case of the classic gets very hot. Using this limit setting the charge amps can be set to about 80-85 amps and this keeps the Classic much cooler.