The DC Autotransformer/Equalizer can efficiently convert DC power up or down from one voltage to another. This can be especially helpful when trying to charge a 12V battery from a distant solar array since these units allow you to wire your solar array for 24 or 48V to minimize line loss. The Lineal Cyurrent Boosters are typically used in solar water pumping systems to maximize the power produced and hence water pumped in low light level conditions in the morning and evening.