Magnum Energy Ms Series Pure Sine Wave Inverter/chargers 12v Dc Input Voltage, 2800w Continuous Cap., 3900w Surge 125a Output, 53lb. . Power your TVs, stereos, plasma screens and other sensitive electronics without worry. This pure sine wave inverter and power-factor corrected charger provides clean, reliable inverter power with a total harmonic distortion of less than 5%. Flash programming allows easy memory upgrades. The transfer relay shifts power automatically in 16 milliseconds whenever shore power is lost, preventing crashes from damaging sensitive electronics. The inverter/charger keeps its cool, with dual variable-speed brushless cooling fans. Like other Magnum inverter/chargers, the MS Series includes five-stage smart battery chargers (with Bulk, Absorption, Float, Equalization and Battery Saver which maintains your batteries in storage without drying them out). Ruggedly marinized for corrosion protection in the salt water environment, the MS Series includes conformal coated c