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.
- 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
| 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
| 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
| 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
| 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
| 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 |
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.