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Home  >  Battery Management  >  Battery Isolators  > Cole Hersee-A Littelfuse Brand(x)
# of Battery Banks
Current Rating
# of Alternators
# of Studs
Voltage Rating

Battery Isolators for Multiple Batteries

Battery isolators are best seen as the distribution point of an automotive electrical system. Generally built with diodes, isolators ensure that charge is evenly distributed between multiple batteries and the alternator.

Battery Isolators eliminate multi-battery drain when two or more battery banks are in a charging system. These function as a check valve between the batteries and the alternator, allowing current to only flow in one direction, from the alternator to the batteries. Quality and reliability are the cornerstone of our battery isolator selection, featuring leading manufacturers such as EATON and Cole Hersee.

Need a battery isolator for automotive, equipment or marine applications? Waytek offers a variety of solid state models, all designed to meet or exceed OEM specifications. Want a battery isolator with "brains"? Waytek also carries a selection of smart battery isolators, which are smaller, lighter, more flexible and generate less heat than traditional models.


1 - 5 of 5
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Description
Price
Quantity
  • Cole Hersee 48090 Battery Isolators
  • Category: Battery Isolators
  • Manufacturer: Cole Hersee
  • # of Battery Banks: 2
  • # of Alternators: 1
  • Termination: (3) 1/4 Studs
  • Amp Rating: 90A
  • For use in 12-36 volt DC Negative ground systems
  • Mounting holes: (2) 9/32  holes
  • Battery isolators are designed for vehicles and equipment with multiple batteries - one for starting the engine and another for powering accessories
  • Battery isolators prevent a battery with a higher charge from draining into a battery with a lower charge
  • Ensures your accessories won't drain your starting battery
  • Allows for both batteries to be charged simultaneously from one source
  • Electronic components are embedded for protection from contamination and vibration
  • Integral heat sink provides efficient heat dissipation
  • More battery management products available
  • Use with alternators that do not have integral electronic voltage regulator
Item#:
77053
Manufacturer Item:
48090
Manufacturer:
Cole Hersee-A Littelfuse Brand
Min. Order Qty:
1
Avail #:
80
 
RoHS Compliant
REACH Compliant
Price Break for UM: EA

Qty Piece Price Ext. Price
1
55.7900
55.79
5
52.2500
261.25
10
48.9300
489.30
25
45.7100
1142.75
50
43.9500
2197.50
  • Cole Hersee 48120 Battery Isolators
  • Category: Battery Isolators
  • Manufacturer: Cole Hersee
  • # of Battery Banks: 2
  • # of Alternators: 1
  • Termination: (3) 5/16 Studs
  • Amp Rating: 140A
  • For use in 12-36 volt DC Negative ground systems
  • Mounting holes: (4) 9/32  holes
  • Battery isolators are designed for vehicles and equipment with multiple batteries - one for starting the engine and another for powering accessories
  • Battery isolators prevent a battery with a higher charge from draining into a battery with a lower charge
  • Ensures your accessories won't drain your starting battery
  • Allows for both batteries to be charged simultaneously from one source
  • Electronic components are embedded for protection from contamination and vibration
  • Integral heat sink provides efficient heat dissipation
  • More battery management products available
  • Use with alternators that do not have integral electronic voltage regulator
Item#:
77054
Manufacturer Item:
48120
Manufacturer:
Cole Hersee-A Littelfuse Brand
Min. Order Qty:
1
Avail #:
1
 
RoHS Compliant
REACH Compliant
Price Break for UM: EA

Qty Piece Price Ext. Price
1
89.1700
89.17
5
83.5100
417.55
10
78.2000
782.00
25
73.0600
1826.50
50
70.2500
3512.50
  • Cole Hersee 48122 Battery Isolators
  • Category: Battery Isolators
  • Manufacturer: Cole Hersee
  • # of Battery Banks: 2
  • # of Alternators: 1
  • Termination: (3) 5/16 Studs, (1) #10 Stud
  • Amp Rating: 140A
  • For use in 12-36 volt DC Negative ground systems
  • Mounting holes: (4) 9/32  holes
  • Battery isolators are designed for vehicles and equipment with multiple batteries - one for starting the engine and another for powering accessories
  • Battery isolators prevent a battery with a higher charge from draining into a battery with a lower charge
  • Ensures your accessories won't drain your starting battery
  • Allows for both batteries to be charged simultaneously from one source
  • Electronic components are embedded for protection from contamination and vibration
  • Integral heat sink provides efficient heat dissipation
  • More battery management products available
  • For use with Delcotron-type alternators
Item#:
77056
Manufacturer Item:
48122
Manufacturer:
Cole Hersee-A Littelfuse Brand
Min. Order Qty:
1
Avail #:
4
 
RoHS Compliant
REACH Compliant
Price Break for UM: EA

Qty Piece Price Ext. Price
1
94.9300
94.93
5
88.9000
444.50
10
83.2500
832.50
25
77.7900
1944.75
50
74.7900
3739.50
  • Cole Hersee 48525 Smart Battery Isolators
  • Category: Battery Isolators
  • Manufacturer: Cole Hersee
  • # of Battery Banks: 1
  • # of Alternators: 2
  • Termination: 5/16 -24 copper studs
  • Amp Rating: 85A
  • Voltage: 9-16VDC
  • LED status indicator
  • Works with SAE J1455 & J1113
  • Operating Temperature: 185°F (85°C) to -40°F (-40°C)
  • IP65 Ingress Protection
  • Works with all alternator types
  • Smart battery isolators are smaller, lighter and generate less heat than standard battery isolators
  • Reduces battery charging system workload by not connecting auxiliary battery until primary battery is charged to 13.2V
  • Allows bi-directional charging from alternator or from shore/campground charging components
  • Optional start assist - connect to a momentary switch that will allow the auxiliary battery to assist the starting battery
  • The most flexible battery isolator solution
Item#:
77050
Manufacturer Item:
48525
Manufacturer:
Cole Hersee-A Littelfuse Brand
Min. Order Qty:
1
Avail #:
69
 
RoHS Compliant
REACH Compliant
Price Break for UM: EA

Qty Piece Price Ext. Price
1
75.4400
75.44
5
70.6500
353.25
10
66.1700
661.70
25
61.8100
1545.25
50
59.4400
2972.00
  • Cole Hersee 48530 Smart Battery Isolators
  • Category: Battery Isolators
  • Manufacturer: Cole Hersee
  • # of Battery Banks: 1
  • # of Alternators: 2
  • Termination: 5/16 -24 copper studs
  • Amp Rating: 200A
  • Voltage: 9-16VDC
  • LED status indicator
  • Works with SAE J1455 & J1113
  • Operating Temperature: 185°F (85°C) to -40°F (-40°C)
  • IP65 Ingress Protection
  • Works with all alternator types
  • Smart battery isolators are smaller, lighter and generate less heat than standard battery isolators
  • Reduces battery charging system workload by not connecting auxiliary battery until primary battery is charged to 13.2V
  • Allows bi-directional charging from alternator or from shore/campground charging components
  • Optional start assist - connect to a momentary switch that will allow the auxiliary battery to assist the starting battery
  • The most flexible battery isolator solution
Item#:
77051
Manufacturer Item:
48530
Manufacturer:
Cole Hersee-A Littelfuse Brand
Min. Order Qty:
1
Avail #:
821
 
RoHS Compliant
REACH Compliant
Price Break for UM: EA

Qty Piece Price Ext. Price
1
121.5100
121.51
5
116.5900
582.95
10
111.8800
1118.80
25
105.5400
2638.50
1 - 5 of 5
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Types of Battery Isolators

The two types of battery isolators are diode and solenoid.

Diode Battery Isolators

The diode battery isolator combines two high current diodes in a heat sink. The benefits are that they do not require maintenance and last a long time. However, many diode-based isolators experience voltage loss, causing an inability to charge to as high a voltage as when connected to a vehicle alternator. Advanced diode battery isolators also include an extra terminal that is used to control current flow through the isolator.

Solenoid Battery Isolators

Solenoid (relay) battery isolators use large, high current relays to control electric current flow through the isolator. This benefit of this type is that it doesn’t experience any voltage loss. However, its reliability is lower than the diode battery isolator, so it may require replacement sooner and more frequently.

Battery Isolator Uses

Battery isolators are most commonly used on systems that have multiple batteries. Using these will ensure the battery doesn’t drain the others in the system, offering key redundancy in a system that needs either multiple backups or needs to have several batteries on one alternator.

Waytek is a one-stop shop for all your battery management system needs. From tin plated battery lugs designed to protect against corrosion to electrical disconnect switches engineered to protect against electrical fires, theft and excessive battery drain -Waytek’s got you covered. Below are some additional products to help you easily install and manage your battery isolator.

  • Battery Lugs
  • Battery Cables
  • Battery Boots
  • Customer Service Hours
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    1.800.328.2724
    Waytek, Inc.
    2440 Galpin Court
    Chanhassen, MN 55317 USA
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