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Battery Switch Technical Information - How to Use PERKO Battery Switches

systems with one or more engines and facilitate putting New Concept Selector Switch.
batteries in parallel for emergency starting when one or both Fig. 8521 Series:
batteries are substantially discharged.
These small selector switches offer a completely new approach
When you’re done for the day, start your engine and head to battery switches for small boats not normally equipped with
home. You will recharge that battery on your way back. But if the ability to shut off the electrical system. Their primary
you happened to drain it too much to start the engine, then purpose is to prevent battery drain during regular periods of
just change the switch position to the other battery that is fully normal non-use. This selector version offers the option of
charged and you’re on your way. adding a second battery to the system.
The “both” positions can be used in the event neither battery An entirely new mounting system (designed specifically for
has enough power to start your engine. In this case using two small boats) makes these switches simple to install and to
badly discharged batteries together just may provide enough access on boats with limited space and low amperage draws.
power to start. Note that running in the “both” position may Simply cut a 4" hole, install the cup mounted switch with 4
not fully recharge both batteries. Recharging is best done with screws, attach the cables and you're off. The integral lid closes
the switch set to either the 1 or 2 position. Once back at the flush to the mounting surface, protects the switch from the
dock, turn the switch to the “off” position to prevent either elements and provides a clean, professional look. To turn on
battery from draining while in storage. or off, simply open the lid, turn the easy to hold key and close
the lid. No more dead battery.
High conductivity studs are long enough to handle more than
1 cable and strong enough for torque needed for secure Other series features include ignition protection, white or black
connections. Optional spacer ring (PN 0462DP0RED) allows for mounting cups, panel and bulkhead mount options and a
the use of larger cables. large plastic key that is retained or can be easily removed to
prevent accidental actuation. An on-off version (9621DP) is
Always consult a certified marine electrician if you have any
questions or doubt about how to use, install or wire any also available. 5
battery switch. Heavy Duty Selector Switches
Medium Duty Selector Switches Fig. 8603 Series:
Perko 8603 battery selector switches are among the most
Figs. 8501-8504 Series: popular heavy duty battery switches ever produced. Their use
This series of battery selector switches are among the most of the traditional Perko bolt circle makes for easy installation,
popular battery switches ever produced. Their use of the whether new or as a replacement. These switches can be
traditional Perko bolt circle makes for easy installation, whether mounted in numerous locations, and as ignition protected
new or as a replacement. These switches can be mounted in switches, they can be installed in the engine rooms of gasoline
numerous locations and positions, and as ignition protected powered boats.
switches, they can be installed in the engine rooms of gasoline
powered boats. These heavy duty switches are rated at up to 380 amps
continuous and 850 amps intermittent (see specifications). An
In addition to doing everything a battery disconnect switch alternator field disconnect feature is standard. The 90º rotation
does, battery selector switches permit battery selection (of two feature of the knob allows users to feel the switches’ position
or more batteries) for specific purposes including starting in no light situations, and the classic shape of the knob makes Battery Switches and Electrical Components
engines, running accessories or even recharging. They allow it easy to turn.
for the use of one or more batteries in systems with one or
more engines and facilitate putting batteries in parallel for
emergency starting when one or both batteries are Using Perko Cup Mount Battery Switches.
substantially discharged. Perko’s new “cup mount” system offers an entirely new
Versions of the 8501 Series switches offer additional features approach to battery switch installations and gives owners of
such as alternator disconnect and key lock security. small boats an easy way to reduce the likelihood of a dead
battery. Designed primarily for smaller boats with limited
The 90° rotation feature allows users to feel the switches' mounting location options, these switches offer an entirely
position in no light situations and the classic shape of the knob new approach to battery switch installation. They let you
makes it easy to turn.
mount a switch in places not normally thought of for switch
Compact Selector Switches installation like:
Figs. 8511 and 8512 Series: • On the side of center consoles
Compact battery selector switches use the same traditional
Perko bolt pattern as the 8501 series but with a smaller • Under seats
footprint. This makes for easy installation. These switches can • Against exposed bulkheads
be mounted in numerous locations and positions, and as Switches are flush mounted on the surface with no petrusions
ignition protected switches, they can be installed in the engine to bump against and protected from the elements by a simple
rooms of gasoline powered boats.
to open and close cover while the inner workings remain safely
Versions of the 8511 series switches offer additional features inside a compartment.
such as alternator disconnect and key lock security.
The cup mount switches are easy to install and simple to
Four removable skirt panels allow for easy cable connection access while remaining completely out of the way.
from different directions. High conductivity studs are long
enough to handle more than 1 cable and strong enough for
torque needed for secure connections.

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Visit www.perko.com for installation instructions and technical drawings on most PERKO products. 77