The Compact size Pure Sine Wave model SK DC-AC inverters are available in 12/24/48 VDC models from 150W ti the large and powerful 3000W inverter. Built-in multistage of power saving control endowed it with more practical function in saving your battery power for when you need it the most. Offering quality pure sine wave output, the SK series stand-alone inverters are ideally suited for electrical systems that already have a quality battery charger.