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Home > Electrical Supply >

Battery Isolator




Solid state devices which allow electrical current to flow in one directly only. This allows one alternator to be connected to multiple battery banks without fear of fully charged batteries discharging into undercharged batteries





Newmar 1-2-120 Isolator 1 alternator, 2 battery banks 120A
Newmar 1-2-70 Isolator 1 Alternator 2 Bank Battery 70A
Newmar 1-2-120 Isolator 1 alternator, 2 battery banks 120A

Brand New with Factory Warranty

List Price: $US 218.30
Our Price: $US 159.00

Newmar 1-2-70 Isolator 1 Alternator 2 Bank Battery 70A

Brand New with Factory Warranty

List Price: $US 149.00
Our Price: $US 91.25

Newmar 1-3-120 Isolator 1 Alternator 3 Bank Battery 120A
Newmar 1-3-70 Isolator 1 Alternator 3 Bank Battery 70A
Newmar 1-3-120 Isolator 1 Alternator 3 Bank Battery 120A

Brand New with Factory Warranty

List Price: $US 257.57
Our Price: $US 219.00

Newmar 1-3-70 Isolator 1 Alternator 3 Bank Battery 70A

Brand New with Factory Warranty

List Price: $US 230.00
Our Price: $US 169.00

Newmar 2-3-120 Isolator 2 Alternator 3 Bank Battery 120A
Newmar 2-3-70 Isolator 2 Alternator 3 Bank Battery 70A
Newmar 2-3-120 Isolator 2 Alternator 3 Bank Battery 120A

Brand New with Factory Warranty

List Price: $US 496.65
Our Price: $US 389.00

Newmar 2-3-70 Isolator 2 Alternator 3 Bank Battery 70A

Brand New with Factory Warranty

List Price: $US 264.50
Our Price: $US 219.00

Mastervolt Battery Mate 1602 IG Isolator - 120 Amp, 2 Bank, 83116025
Mastervolt Battery Mate 1603 IG Isolator - 120A, 3 Bank Battery, 83116035
Mastervolt Battery Mate 1602 IG Isolator - 120 Amp, 2 Bank, 83116025

Up to $4000 Mail-in Rebate

List Price: $US 433.00
Our Price: $US 309.00

Mastervolt Battery Mate 1603 IG Isolator - 120A, 3 Bank Battery, 83116035

Up to $4000 Mail-in Rebate

List Price: $US 485.00
Our Price: $US 349.00

Mastervolt Battery Mate 2503 IG Isolator - 200 Amp, 3 Bank Battery, 83125035
Victron Argo Diode Battery Isolator - 160AMP - 2 Batteries
Mastervolt Battery Mate 2503 IG Isolator - 200 Amp, 3 Bank Battery, 83125035

Up to $4000 Mail-in Rebate

List Price: $US 523.00
Our Price: $US 379.00

Victron Argo Diode Battery Isolator - 160AMP - 2 Batteries

Brand New with Factory Warranty

List Price: $US 106.00
Our Price: $US 90.10

Victron Argo FET Battery Isolator - 100AMP - 2 Batteries
Victron Argo FET Battery Isolator - 200AMP - 2 Batteries
Victron Argo FET Battery Isolator - 100AMP - 2 Batteries

Brand New with Factory Warranty

List Price: $US 118.00
Our Price: $US 100.30

Victron Argo FET Battery Isolator - 200AMP - 2 Batteries

Brand New with Factory Warranty

List Price: $US 141.00
Our Price: $US 119.85

Victron Argo FET Battery Isolator 200-3 3 Batteries - 200AMP, ARG200301020
Victron Galvanic Isolator VDI-32A 32A Max Waterproof (Potted) GDI000032000
Victron Argo FET Battery Isolator 200-3 3 Batteries - 200AMP, ARG200301020

Brand New with Factory Warranty

List Price: $US 165.00
Our Price: $US 140.25

Victron Galvanic Isolator VDI-32A 32A Max Waterproof (Potted) GDI000032000

Brand New with Factory Warranty

List Price: $US 277.00
Our Price: $US 249.05

Victron Galvanic Isolator VDI-64A 64A Max Waterproof (Potted) GDI000064000
Victron Argofet Battery Isolator 100-3 3 Batteries - 100AMP
Victron Galvanic Isolator VDI-64A 64A Max Waterproof (Potted) GDI000064000

Brand New with Factory Warranty

List Price: $US 337.00
Our Price: $US 305.15

Victron Argofet Battery Isolator 100-3 3 Batteries - 100AMP

Brand New with Factory Warranty

List Price: $US 135.00
Our Price: $US 114.75

ProMariner Battery Isolator - 1 Alternator - 2 Battery - 70 AMP
ProMariner Battery Isolator - 1 Alternator - 3 Battery - 70 AMP
ProMariner Battery Isolator - 1 Alternator - 2 Battery - 70 AMP

Up to $4000 Mail-in Rebate

List Price: $US 179.00
Our Price: $US 89.00

ProMariner Battery Isolator - 1 Alternator - 3 Battery - 70 AMP

Up to $4000 Mail-in Rebate

List Price: $US 199.00
Our Price: $US 99.00

ProMariner Battery Isolator - 2 Alternator - 2 Battery - 70 AMP
ProMariner Battery Isolator - 2 Alternator - 3 Battery - 70 AMP
ProMariner Battery Isolator - 2 Alternator - 2 Battery - 70 AMP

Up to $4000 Mail-in Rebate

List Price: $US 249.00
Our Price: $US 149.00

ProMariner Battery Isolator - 2 Alternator - 3 Battery - 70 AMP

Up to $4000 Mail-in Rebate

List Price: $US 279.00
Our Price: $US 179.00

ProMariner Battery Isolator - 1 Alternator - 2 Battery - 130 AMP
ProMariner Battery Isolator - 1 Alternator - 3 Battery - 130 AMP
ProMariner Battery Isolator - 1 Alternator - 2 Battery - 130 AMP

Up to $4000 Mail-in Rebate

List Price: $US 209.00
Our Price: $US 109.00

ProMariner Battery Isolator - 1 Alternator - 3 Battery - 130 AMP

Up to $4000 Mail-in Rebate

List Price: $US 293.00
Our Price: $US 149.00

ProMariner Battery Isolator - 2 Alternator - 2 Battery - 130 AMP
ProMariner Battery Isolator - 2 Alternator - 3 Battery - 130 AMP
ProMariner Battery Isolator - 2 Alternator - 2 Battery - 130 AMP

Up to $4000 Mail-in Rebate

List Price: $US 459.00
Our Price: $US 229.00

ProMariner Battery Isolator - 2 Alternator - 3 Battery - 130 AMP

Up to $4000 Mail-in Rebate

List Price: $US 666.00
Our Price: $US 329.00

Victron Galvanic Isolator VDI-16A, 16 AMP Max Waterproof Potted GDI000016000
ProMariner ProIsoCharge 120 0 Voltage Loss Isolator 12v 1 Alternator 2 Batteries
Victron Galvanic Isolator VDI-16A, 16 AMP Max Waterproof Potted GDI000016000

Brand New with Factory Warranty

List Price: $US 277.00
Our Price: $US 108.80

ProMariner ProIsoCharge 120 0 Voltage Loss Isolator 12v 1 Alternator 2 Batteries

Up to $4000 Mail-in Rebate

List Price: $US 199.00
Our Price: $US 149.00

ProMariner ProIsoCharge 180 0 Voltage Loss Isolator 12v 1 Alternator 2 Batteries
ProMariner ProIsoCharge 250 0 Voltage Loss Isolator 12v 1 Alternator 2 Batteries
ProMariner ProIsoCharge 180 0 Voltage Loss Isolator 12v 1 Alternator 2 Batteries

Up to $4000 Mail-in Rebate

List Price: $US 269.00
Our Price: $US 169.00

ProMariner ProIsoCharge 250 0 Voltage Loss Isolator 12v 1 Alternator 2 Batteries

Up to $4000 Mail-in Rebate

List Price: $US 349.00
Our Price: $US 249.00

ProMariner ProIsoCharge 120 0 Voltage Loss Isolator 12v 1 Alternator 3 Batteries
ProMariner ProIsoCharge 180 0 Voltage Loss Isolator 12v 1 Alternator 3 Batteries
ProMariner ProIsoCharge 120 0 Voltage Loss Isolator 12v 1 Alternator 3 Batteries

Up to $4000 Mail-in Rebate

List Price: $US 259.00
Our Price: $US 159.00

ProMariner ProIsoCharge 180 0 Voltage Loss Isolator 12v 1 Alternator 3 Batteries

Up to $4000 Mail-in Rebate

List Price: $US 289.00
Our Price: $US 189.00

ProMariner ProIsoCharge 250 0 Voltage Loss Isolator 12v 1 Alternator 3 Batteries
ProMariner ProIsoCharge 130 0 Voltage Loss Isolator 2 Alternator 4 Batteries
ProMariner ProIsoCharge 250 0 Voltage Loss Isolator 12v 1 Alternator 3 Batteries

Up to $4000 Mail-in Rebate

List Price: $US 319.00
Our Price: $US 219.00

ProMariner ProIsoCharge 130 0 Voltage Loss Isolator 2 Alternator 4 Batteries

Up to $4000 Mail-in Rebate

List Price: $US 444.00
Our Price: $US 279.00

ProMariner ProIsoCharge 150 0 Voltage Loss Isolator 24v 1 Alternator 3 Batteries
Mastervolt BI1203 BI Series Battery Isolator 120 Amp 3 Battery
ProMariner ProIsoCharge 150 0 Voltage Loss Isolator 24v 1 Alternator 3 Batteries

Up to $4000 Mail-in Rebate

List Price: $US 370.00
Our Price: $US 229.00

Mastervolt BI1203 BI Series Battery Isolator 120 Amp 3 Battery

Up to $4000 Mail-in Rebate

List Price: $US 288.00
Our Price: $US 219.00

Mastervolt BI1202-S BI Series Battery Isolator 120 Amp 2 Battery
Mastervolt BI703 BI Series Battery Isolator 70 Amp 3 Battery
Mastervolt BI1202-S BI Series Battery Isolator 120 Amp 2 Battery

Up to $4000 Mail-in Rebate

List Price: $US 210.00
Our Price: $US 159.00

Mastervolt BI703 BI Series Battery Isolator 70 Amp 3 Battery

Up to $4000 Mail-in Rebate

List Price: $US 178.00
Our Price: $US 139.00

Mastervolt BI702-S BI Series Battery Isolator 70 Amp 2 Battery
Mastervolt BI702-S BI Series Battery Isolator 70 Amp 2 Battery

Up to $4000 Mail-in Rebate

List Price: $US 111.00
Our Price: $US 89.00


Q. What is an isolator used for?
A. They are solid state devices which allow electrical current to flow in one directly only. This allows one alternator to be connected to multiple battery banks without fear of fully charged batteries discharging into undercharged batteries.
Q. How do I know which isolator I need?
A. It all depends on the number of alternators you have, the amperage output of the alternator(s), and the number of batteries that you are wiring to.NOTE: Professional Mariner Isolators are not recommended for use with the following alternators: Niehoff; Delco 10 SI type 116, 25 SI or 30 SI series; Hitachi LR 135-31 type, 110 or 106 type; Leece Neville JB series; or any self exciting style alternator.
Q. How do I wire up the isolator?
A. ANSWER: The isolator is wired between the alternator and the batteries. You would have either one or two input terminals that connect from the alternator and either two or three output terminals that go to the batteries.
Q. There is no output voltage on my isolator?
A. You can check to see if the isolator is working with a digital multi-meter set on “DIODE CHECK” mode. Put the red lead on the alternator input terminal and the black lead on one of the battery output terminals…..you should get a reading around .4 on most meters. Then reverse the leads and you should get a reading of infinity. Perform this procedure from all of your alternator input terminals to all of your battery output terminals. If you get a different reading with the red lead on a battery terminal then the isolator is defective.
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