30A 18650/Lithium/LiFePo4 PWM Solar Charge Controller
If you have a custom 3s lithium battery pack built with 3.7v 18650 cells or a 4s lifepo4 system built with 3.2v cells or the lumos or sako battery then this is for you. this controller has 3 settings b1 = lead acid batteries b2 = 3s lithium battery pack b3 = 4s lifepo4 array you don't need to "manage" a controller not built for these batteries anymore!