Dc Electrical System - Marquis 720 FLY Owner's Manual

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A 24-volt DC (Direct Current) electrical system is equipped on the yacht . The DC system is a comprehensive system designed to
meet present and future 24-volt electrical needs . Wire-runs and connections are positioned to prevent abrasion and exposure to
moisture, as well as to remain accessible for inspection, repairs, and the addition of aftermarket electrical accessories .
Wires used throughout the DC electrical system are plastic coated and color-coded . Connections are made, using crimped connector
points . The electrical system is virtually maintenance free, with only the batteries requiring periodic inspection and maintenance .
MASTER DISCONNECT SWITCHES
Master disconnect switches control electricity from the batteries to the DC bus distribution panel, engines, and accessories . The
master disconnect switches are located in the engine room on the STDB and PORT aft bulkheads . Turn the master disconnect switch
to the ON position to provide electricity to the DC Bus Distribution Panel . Circuit breakers on the DC bus distribution panel control the
flow of electricity to the other DC circuit breaker panels .
PORT Master Disconnect Panel
BATTERIES
The DC electrical system is divided into three areas, each powered by one or more, 12-volt batteries:
• Engine, Bow, and Stern:
• Accessory:
• Generator:
battery Layout - Hull Location
7027 • A2 07/11
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STbD Master Disconnect Panel
Four 12 Volt batteries (two for each engine, batteries also supply power to Bow and Thruster)
Four 12-volt batteries, located at each bank parallel connected to produce 12-volts
One 12-volt battery, placed at aft of generator
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battery Detail (4 shown, 8 total)
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