[PDF] Bussmann series Battery Isolator Product Profile No. 10104

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Protect engine starting power

Battery isolators

Battery isolators

prevent auxiliary batteries from draining main battery power in vehicle electrical systems.

Product description:

Designed by Sure Power™,

battery isolators are solid state devices in a multi- battery charging system that help ensure engine starting power.

The battery isolators act

as a check valve to prevent auxiliary batteries from draining the main battery.

When installed, isolators

allow vehicle accessories to draw current from the auxiliary battery without affecting the battery used for engine starting. This frees up the vehicle's charging system so that the main and auxiliary batteries can charge and discharge according the needs of their electrical loads.BUSSMANN SERIES• Suited for light truck, RV, select commercial and marine applications.

Easily connects alternator to one main and one auxiliary battery.• Includes wiring and hardware for basic installation. An optional

installation kit is available for advanced installation.Features and bene?ts:

Eaton and Bussmann are valuable

trademarks of Eaton in the US and other countries. You are not permitted to use the Eaton trademarks without prior written consent of Eaton.Eaton

1000 Eaton Boulevard

Cleveland, OH 44122

United States

Eaton.com

Bussmann Division

114 Old State Road

Ellisville, MO 63021

United States

Eaton.com/bussmannseries

© 2015 Eaton

All Rights Reserved

Printed in USA

Publication No. 10104

October 2015

Catalog numberDescriptionModel no.Unit UPCUnit dimensions (HxWxL)Unit weight(lbs.) Carton qty.Carton barcode

RB-BI-70A70A Battery Isolator

w/wiring kit7020517124945264.25" x 3.44" x 4.75"1.5741270051712494525

RB-BI-95A

95A Battery Isolator

w/wiring kit9523A0517124040064.25" x 3.44" x 4.75"1.5741270051712404005

RB-BI-120A

120A Battery Isolator

w/wiring kit12023A0517124040136.75" x 3.44" x 4.875"2.538870051712404012

RB-BI-130A

130A Battery Isolator

w/wiring kit13023A0517124040206.75" x 3.44" x 4.875"2.538870051712404029

RB-BI-240A

240A Battery Isolator

w/wiring kit24023A0517124945332.75" x 5.25" x 13.3"4.98470051712494532

RB-BIK-1882

Battery Isolator

Installation Kit11820517124040374.25" x 3.44" x 4.75"1.21270051712404036

RB-GM-KIT

GM Delco

CS Series144-CD0517124040514.31" x 1.06" x 4.75"0.1741870051712404050

Why batteries need isolating

Multiple batteries are often connected in an electrical system, one to start the engine and another to power accessories. This can become a problem when a fully charged battery is connected to a partially discharged or dead battery. The current in the fully charged battery will ?ow to the less charged battery, until both reach a common charge level, or even worse, discharge completely. Regardless of how many batteries are available, this current ?ow from one battery to another will continue until all batteries in the electrical system reach the same charge level and may prevent the

engine from starting.Battery isolators ensure reliable engine startsA battery isolator can eliminate the problem of battery drain altogether. A battery isolator acts as a check valve between

the batteries to prevent current ?owing from a battery with a full charge to one that is partially charged. Each battery is isolated and acts as an independent power source. This allows the main battery to conserve power even if the auxiliary battery is fully discharged. When charging, each battery determines the amount of charge it needs based on its own requirements. This control method is the best way of isolation. Illustration of multi-battery drain. Accessories connected to auxiliary battery #2 drain power from main battery #1 until both reach an equal state of charge. 12 A l t e r n a t o r B a t t e r y I s o l a t o r

MainAux

12 12

MainAux

12 A l t e r n a t o r B a t t e r y I s o l a t o r

MainAux

121
2

MainAux

When the engine is running, the alternator provides current to both batteries with equalized voltage while the battery isolator protects against parasitic current ?ow from one battery to the other.

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For Eaton's Bussmann series

product information, call

1-855-287-7626

or visit:

Eaton.com/BussmannConsumer

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