PROsine 1800 806-1802 HW/TR, 12V input, 1800W, with AC Hard Wire & Transfer Switch: Offering superior quality true sine wave output, the Prosine 1000 and 1800 stand-alone inverters are ideally suited for electrical systems that already have a quality multistage battery charger. Designed for recreational and industrial applications, their 120-volt, 60 Hz AC power output is capable of handling both heavy duty and smaller, multiple AC loads.