RioRand (TM) 30Amp charger battery eTracer ET3415 30A MPPT Charge Regulator New RioRand MPPT technology; Excellent thermal design and nature air cooling; CE certificate; 12/24/36/48V auto work,Advanced MPPT technology,Several seconds tracking speed High Tracking efficiency of 99%,Multiphase synchronous rectification technology Peak conversion efficiency of 98% 7) DSP&ARM processors architecture ensures high speed and performance Three stages charging optimizes battery performance