A smart charger controller harvests the solar-to-battery energy flow, maximizing its efficiency and extending a battery life expectancy. Operates with various battery technologies (e.g. lithium-ion LiFePO4, flooded lead-acid, AGM and Gel). The smart solar charge controller will start charging even if the battery has been discharged to zero volts. It works with 12V and 24V systems and can handle up to 430 W of solar in a 12V configuration and 840W in a 24V configuration.