Mastervolt Powerbook 2023 EN

TECHNICAL TERMS “Oyster aims to provide the best customer service in the industry. This is only possible if its key suppliers have similar aims and can provide the service and support that Oyster owners have become accustomed to. Mastervolt has always displayed the right dedication to service, supporting Oyster yachts around the world. Mastervolt is willing to go that extra mile to provide the service and support which set Oyster apart.” PETER INGRAM, TECHNICAL MANAGER OYSTER YACHTS, UNITED KINGDOM QUOTE n Transfer system A (frequently automatic) system used to switch between multiple power sources, such as grid, generator and inverter. n UL approval An American certification provided by Underwriters Laboratories that is similar to the European CE-mark and mainly focused on safety issues. n Volt (V) Unit in which electric potential (voltage) is measured. n Volt-amps (VA) Unit for measuring electrical power. n Voltage ripple A voltage ripple is a small alternating current on top of a direct current, which results in a DC voltage that is not entirely smooth but ripples slightly. While a battery delivers pure direct current without any ripple, this is not always the case with a battery charger. In an old-fashioned battery charger, 50 % of the voltage will contain ripples. A large voltage ripple shortens the lifespan of a battery, which needs to be charged with direct (not alternating) current. In addition, a voltage ripple can interfere with onboard audio, navigation and communications systems. Mastervolt battery chargers supply a flat DC voltage with no more than 0.3 % of ripple voltage. n Watt (W) Unit that measures the rate of energy, calculated by multiplying volts by amps. n Watt-hour (Wh) Measure of electrical power in time. One watt-hour of electricity is equal to one watt of power consumed over one hour. A 10-watt light bulb uses 10 watt-hours of electricity in one hour (see also kWh). V U W 151