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Amps
# of Alternators
# of Studs
# of Battery Banks

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 - 12 of 24
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Description
Price
Quantity
  • Cole Hersee 48090 Battery Isolators
  • Category: Battery Isolators
  • Manufacturer: Cole Hersee
  • # of Battery Banks: 1
  • # of Alternators: 2
  • 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
Item#:
77053
Manufacturer Item:
48090
Manufacturer:
Cole Hersee-A Littelfuse Brand
Min. Order Qty:
1
Avail #:
0
 
RoHS Compliant
REACH Compliant
Price Break for UM: EA

Qty Piece Price Ext. Price
1
48.6360
48.64
5
45.5490
227.75
10
42.6510
426.51
25
39.8510
996.28
50
38.3160
1915.80
  • 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
Item#:
77054
Manufacturer Item:
48120
Manufacturer:
Cole Hersee-A Littelfuse Brand
Min. Order Qty:
1
Avail #:
22
 
RoHS Compliant
REACH Compliant
Price Break for UM: EA

Qty Piece Price Ext. Price
1
77.7320
77.73
5
72.7970
363.99
10
68.1770
681.77
25
63.6850
1592.13
50
61.2440
3062.20
  • 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
Item#:
77056
Manufacturer Item:
48122
Manufacturer:
Cole Hersee-A Littelfuse Brand
Min. Order Qty:
1
Avail #:
7
 
RoHS Compliant
REACH Compliant
Price Break for UM: EA

Qty Piece Price Ext. Price
1
93.0720
93.07
5
87.1610
435.81
10
81.6270
816.27
25
76.2610
1906.53
50
73.3260
3666.30
  • EATON's Sure Power 122 Multi Battery Isolator
  • Category: Battery Isolators
  • Manufacturer: EATON
  • Sure Power battery isolators eliminate multi-battery drain when 2 or more battery banks are in a charging system
  • Allows each battery to charge according to its own needs
  • Prevents auxiliary power from draining the starter battery
  • Battery isolators make sure you are never stranded with a dead starter battery
  • Sure Power model #122
  • Fully solid state
  • 25 amps
  • 3 studs, 6mm
  • Mounting holes: 2 holes at .210"
Item#:
80045
Manufacturer Item:
122
Manufacturer:
Eaton
Min. Order Qty:
1
Avail #:
17
Price Break for UM: EA

Qty Piece Price Ext. Price
1
33.5060
33.51
5
31.6050
158.03
10
30.5970
305.97
50
28.5930
1429.65
100
27.2330
2723.30
  • EATON's Sure Power 703 Multi Battery Isolator
  • Category: Battery Isolators
  • Manufacturer: EATON
  • Sure Power battery isolators eliminate multi-battery drain when 2 or more battery banks are in a charging system
  • Allows each battery to charge according to its own needs
  • Prevents auxiliary power from draining the starter battery
  • Battery isolators make sure you are never stranded with a dead starter battery
  • Sure Power model #703
  • Fully solid state
  • 70 amps
  • 4 studs, 6mm
  • Mounting holes: 4 holes at .210"
Item#:
80047
Manufacturer Item:
703
Manufacturer:
Eaton
Min. Order Qty:
1
Avail #:
15
Price Break for UM: EA

Qty Piece Price Ext. Price
1
48.4470
48.45
5
45.3710
226.86
10
42.4830
424.83
25
39.6960
992.40
50
38.1620
1908.10
  • EATON's Sure Power 952 Multi Battery Isolator
  • Category: Battery Isolators
  • Manufacturer: EATON
  • Sure Power battery isolators eliminate multi-battery drain when 2 or more battery banks are in a charging system
  • Allows each battery to charge according to its own needs
  • Prevents auxiliary power from draining the starter battery
  • Battery isolators make sure you are never stranded with a dead starter battery
  • Sure Power model #952
  • Fully solid state
  • 95 amps
  • 3 studs, 6mm
  • Mounting holes: 4 holes at .210"
Item#:
80050
Manufacturer Item:
952
Manufacturer:
Eaton
Min. Order Qty:
1
Avail #:
23
Price Break for UM: EA

Qty Piece Price Ext. Price
1
42.9660
42.97
5
40.2360
201.18
10
37.6740
376.74
25
35.2050
880.13
50
33.8460
1692.30
  • EATON's Sure Power 1202 Multi Battery Isolator
  • Category: Battery Isolators
  • Manufacturer: EATON
  • Sure Power battery isolators eliminate multi-battery drain when 2 or more battery banks are in a charging system
  • Allows each battery to charge according to its own needs
  • Prevents auxiliary power from draining the starter battery
  • Battery isolators make sure you are never stranded with a dead starter battery
  • Sure Power model #1202
  • Fully solid state
  • 120 amps
  • 3 studs, 8mm
  • Mounting holes: 6 holes at .210"
Item#:
80051
Manufacturer Item:
1202
Manufacturer:
Eaton
Min. Order Qty:
1
Avail #:
11
Price Break for UM: EA

Qty Piece Price Ext. Price
1
64.5650
64.57
5
60.4590
302.30
10
56.6270
566.27
25
52.9010
1322.53
50
50.8610
2543.05
  • EATON's Sure Power 2002 Multi Battery Isolator
  • Category: Battery Isolators
  • Manufacturer: EATON
  • System operation: 6-50 V DC
  • Max current: 200 AMP
  • Operating temperature: -40°c to 85°c
  • Ground Type: Negative 
  • Terminal and hardware included
  • Vehicle and marine applications
Item#:
80053
Manufacturer Item:
2002
Manufacturer:
Eaton
Min. Order Qty:
1
Avail #:
0
Price Break for UM: EA

Qty Piece Price Ext. Price
1
94.1540
94.15
5
90.3530
451.77
10
86.6990
866.99
25
80.2270
2005.68
  • EATON's Sure Power 24023A-IB Multi Battery Isolator
  • Category: Battery Isolators
  • Manufacturer: EATON
  • Sure Power battery isolators eliminate multi-battery drain when 2 or more battery banks are in a charging system
  • Allows each battery to charge according to its own needs
  • Prevents auxiliary power from draining the starter battery
  • Battery isolators make sure you are never stranded with a dead starter battery
  • Fully solid state
  • 240A
  • Mounting length: 190mm/ 7.480in
  • Mounting width: 115mm/ 4.528in
  • Mounting height: 85mm/ 3.346in
  • Stud size: (1) 3/8-16 Threaded Input Terminal and (3) 3/8-16 Threaded Output Terminals
Item#:
80060
Manufacturer Item:
24023A-IB
Manufacturer:
Eaton
Min. Order Qty:
1
Avail #:
13
 
REACH Compliant
Price Break for UM: EA

Qty Piece Price Ext. Price
1
131.0510
131.05
5
125.7480
628.74
10
120.6560
1206.56
25
111.6620
2791.55
  • EATON's Sure Power 3003 Multi Battery Isolator
  • Category: Battery Isolators
  • Manufacturer: EATON
  • Sure Power battery isolators eliminate multi-battery drain when 2 or more battery banks are in a charging system
  • Allows each battery to charge according to its own needs
  • Prevents auxiliary power from draining the starter battery
  • Battery isolators make sure you are never stranded with a dead starter battery
  • Sure Power model #3003
  • Fully solid state
  • 300 amps
  • 4 studs, 1/2"
  • Mounting holes: 2 holes at .313"
Item#:
80062
Manufacturer Item:
3003
Manufacturer:
Eaton
Min. Order Qty:
1
Avail #:
9
Price Break for UM: EA

Qty Piece Price Ext. Price
1
810.5370
810.54
5
771.9390
3859.70
10
735.1790
7351.79
  • EATON's Sure Power 12023A Multi Battery Isolator
  • Category: Battery Isolators
  • Manufacturer: EATON
  • Sure Power battery isolators eliminate multi-battery drain when 2 or more battery banks are in a charging system
  • Allows each battery to charge according to its own needs
  • Prevents auxiliary power from draining the starter battery
  • Battery isolators make sure you are never stranded with a dead starter battery
  • Sure Power model #12023A
  • Fully solid state
  • 120 amps
  • 3 studs, 8mm
  • Mounting holes: 6 holes at .210"
  • Includes battery isolator plug connector kit 80093
Item#:
80067
Manufacturer Item:
12023A
Manufacturer:
Eaton
Min. Order Qty:
1
Avail #:
39
Price Break for UM: EA

Qty Piece Price Ext. Price
1
75.4430
75.44
5
70.6550
353.28
10
66.1610
661.61
25
61.8100
1545.25
50
59.4410
2972.05
  • EATON's Sure Power 12033A Multi Battery Isolator
  • Category: Battery Isolators
  • Manufacturer: EATON
  • Sure Power battery isolators eliminate multi-battery drain when 2 or more battery banks are in a charging system
  • Allows each battery to charge according to its own needs
  • Prevents auxiliary power from draining the starter battery
  • Battery isolators make sure you are never stranded with a dead starter battery
  • Sure Power model #12033A
  • Fully solid state
  • 120 amps
  • 5 studs, (1) 6mm, (4) 8mm
  • Mounting holes: 6 holes at .210"
  • Includes battery isolator plug connector kit 80093
Item#:
80068
Manufacturer Item:
12033A
Manufacturer:
Eaton
Min. Order Qty:
1
Avail #:
6
Price Break for UM: EA

Qty Piece Price Ext. Price
1
90.1950
90.20
5
86.5410
432.71
10
83.0450
830.45
25
76.8480
1921.20
1 - 12 of 24
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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