... 12/24V Solar Charge Controller,Solar Charge Controller,Solar Controller,12/24V solar charge controller SML series,solar controller SML series,solar pruducts ... disconnect pre-warning.3.PWM-regulation (series type).4.Boost, Equal ize and Float charging, also for VRLA.5 ... functions.The temperature-compensated three-stage PWM charging method (boost -equalizat ionfloat )is now adjustable to sealed and vented ...