System provides constant power allowing use of items such as aerator, spreader lights, radio, etc. while charging. Input voltage 100-130AC/50-60Hz. Pre-wired with 2-6' cables for 12V DC output and one 120 V AC input cable with 15 amp plug. Internal ground provides boat protection without the need for an AC electrical panel. Charger's electronics are protected against impact, vibration, overload and reverse polarity. Lifetime warranty against water damage. Use MAR 150CCI for quick "shorepower" inlet.