Sea Ray 19 SPX, Owner'S Manual

23

19 SPX

19 SPX e

lectrIcal

 S

yStem

1. Dc s

YsTeM

The  12  volt  direct  current  (DC)  electrical  system 

(similar to that in your car or truck) derives its power 

from the batteries. Batteries are kept charged by 

the engine-driven alternator or the optional battery 

charger/converter which must be powered by shore 

power. The batteries supply power to the fuses in 

the engine compartment, or the circuit breakers on 

the main DC breaker panel. This panel contains the 

breakers which supply power to the subpanels and 

fuse blocks at the control station.

The negative terminal of each bank of batteries 

is attached to the negative ground studs of 

the propulsion engines. This “negative ground 

system” is the approved system for marine DC 

electrical systems.

Ask your dealer for a careful analysis of DC power 

needs on your boat. It may be necessary to add 

batteries or auxiliary charging methods to supply 

adequate power for any additional accessories you 

wish to install.

DO NOT USE JUMPER CABLES IN THE ENGINE 

COMPARTMENT.

They can cause an explosion from sparks.

!   

DANGER

A battery will explode if a flame or spark ignites 

the free hydrogen given off during charging.

Never use an open flame or strike sparks in the 

battery area.

!   

DANGER

2. b

aTTeries

The batteries installed in your boat have been 

selected for their ability to furnish starting power 

based on engine starting requirements, as well as 

their ability to power the DC accessories attached 

to the electrical system.

The following tables describe the recommended 

marine batteries to install in your boat. All batteries 

in a battery bank should be of the same type, age, 

and rating.

Standard:

Application

Volts

CCA

RC

QTY

1

st

 Battery

12

800

180

1

2

nd

 Battery (opt)

12

800

180

1

The battery trays and battery cabling installed at 

the manufacturing facility will indicate the quantity 

of the batteries needed in your boat. Installing the 

minimum size battery listed above will insure that 

the battery bank will be sized appropriately.

COLD  CRANKING AMPS  (CCA)  -  a  rating  used 

in the battery industry to classify a battery's ability 

to start an engine in cold temperatures. The rating 

is the number of amps a fully charged battery can 

deliver at 0º Fahrenheit for 30 seconds, while 

maintaining a voltage of at least 7.2 volts, for a 12 

volt battery.

RESERVE CAPACITY (RC) - is a battery industry 

rating, defining a battery's ability to power a vessel 

without a charging device to replenish the battery.  

The rating is the number of minutes a battery at 

80º Fahrenheit can be discharged at 25 amps and 

maintain a voltage of 10.5 volts for a 12 volt battery.

BATTERY BANK - one or more batteries connected 

together in series or parallel to provide the sufficient 

Cold Cranking Amps or Reserve Capacity needed 

to meet engine and calculated boat loads.

To prevent arcing or damage to the alternator, 

always disconnect battery cables before doing any 

work on the engine’s electrical system.

!

   CAUTION

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9/4/2014   2:12:30 PM