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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 1-2-70A Isolator 1 Alternator 2 Bank Battery 70A
Newmar 1-3-120A Isolator 1 Alternator 3 Bank Battery 120A
Newmar 1-2-70A Isolator 1 Alternator 2 Bank Battery 70A

Brand New with Factory Warranty

List Price: $US 129.00
Our Price: $US 79.00

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

Brand New with Factory Warranty

List Price: $US 199.00
Our Price: $US 179.00

Newmar 1-3-70A Isolator 1 Alternator 3 Bank Battery 70A
Newmar 2-3-120A Isolator 2 Alternator 3 Bank Battery 120A
Newmar 1-3-70A Isolator 1 Alternator 3 Bank Battery 70A

Brand New with Factory Warranty

List Price: $US 149.00
Our Price: $US 99.00

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

Brand New with Factory Warranty

List Price: $US 349.00
Our Price: $US 309.00

Newmar 2-3-70A Isolator 2 Alternator 3 Bank Battery 70A
Promariner 1 Alternator 2 Bank Battery Isolator 130A, 1-130-2
Newmar 2-3-70A Isolator 2 Alternator 3 Bank Battery 70A

Brand New with Factory Warranty

List Price: $US 229.00
Our Price: $US 189.00

Promariner 1 Alternator 2 Bank Battery Isolator 130A, 1-130-2

Brand New with Factory Warranty

List Price: $US 139.00
Our Price: $US 86.33

Promariner 1 Alternator 2 Bank Battery Isolator 70A
Promariner 1 Alternator 3 Bank Battery Isolator 70A
Promariner 1 Alternator 2 Bank Battery Isolator 70A

Brand New with Factory Warranty

List Price: $US 89.00
Our Price: $US 66.93

Promariner 1 Alternator 3 Bank Battery Isolator 70A

Brand New with Factory Warranty

List Price: $US 149.00
Our Price: $US 76.63

Promariner 1 Alternator 3 Bank Battery Isolator 130A, 1-130-3
Promariner 2 Alternator 2 Bank Battery Isolator 70A, 02-70-2
Promariner 1 Alternator 3 Bank Battery Isolator 130A, 1-130-3

Brand New with Factory Warranty

List Price: $US 179.00
Our Price: $US 96.03

Promariner 2 Alternator 2 Bank Battery Isolator 70A, 02-70-2

Brand New with Factory Warranty

List Price: $US 169.00
Our Price: $US 96.03

Promariner 2 Alternator 2 Bank Battery Isolator 130A 02-130-2
Promariner 2 Alternator 3 Bank Battery Isolator 70A 02-70-3
Promariner 2 Alternator 2 Bank Battery Isolator 130A 02-130-2

Brand New with Factory Warranty

List Price: $US 279.00
Our Price: $US 144.53

Promariner 2 Alternator 3 Bank Battery Isolator 70A 02-70-3

Brand New with Factory Warranty

List Price: $US 199.00
Our Price: $US 125.13

Promariner 2 Alternator 3 Bank Battery Isolator 130A 2-130-3
ProMariner ProIsoCharge Battery Isolator 120Amp 1-Alternator 2 Bank Battery, 12V
Promariner 2 Alternator 3 Bank Battery Isolator 130A 2-130-3

Brand New with Factory Warranty

List Price: $US 359.00
Our Price: $US 202.73

ProMariner ProIsoCharge Battery Isolator 120Amp 1-Alternator 2 Bank Battery, 12V

Brand New with Factory Warranty

List Price: $US 159.00
Our Price: $US 115.43

ProMariner ProIsoCharge Battery Isolator 180Amp 1-Alternator 2 Bank Battery, 12V
ProMariner ProIsoCharge Battery Isolator 120Amp 1-Alternator 3 Bank Battery, 12V
ProMariner ProIsoCharge Battery Isolator 180Amp 1-Alternator 2 Bank Battery, 12V

Brand New with Factory Warranty

List Price: $US 179.00
Our Price: $US 134.83

ProMariner ProIsoCharge Battery Isolator 120Amp 1-Alternator 3 Bank Battery, 12V

Brand New with Factory Warranty

List Price: $US 169.00
Our Price: $US 125.13

ProMariner ProIsoCharge Battery Isolator 250Amp 1-Alternator 2 Bank Battery, 12V
ProMariner ProIsoCharge Battery Isolator 180Amp 1-Alternator 3 Bank Battery, 12V
ProMariner ProIsoCharge Battery Isolator 250Amp 1-Alternator 2 Bank Battery, 12V

Brand New with Factory Warranty

List Price: $US 209.00
Our Price: $US 144.53

ProMariner ProIsoCharge Battery Isolator 180Amp 1-Alternator 3 Bank Battery, 12V

Brand New with Factory Warranty

List Price: $US 219.00
Our Price: $US 154.23

ProMariner ProIsoCharge Battery Isolator 250Amp 1-Alternator 3 Bank Battery, 12V
ProMariner ProIsoCharge Battery Isolator 130Amp 2-Alternator 4 Bank Battery, 12V
ProMariner ProIsoCharge Battery Isolator 250Amp 1-Alternator 3 Bank Battery, 12V

Brand New with Factory Warranty

List Price: $US 249.00
Our Price: $US 173.63

ProMariner ProIsoCharge Battery Isolator 130Amp 2-Alternator 4 Bank Battery, 12V

Brand New with Factory Warranty

List Price: $US 319.00
Our Price: $US 222.13

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

Brand New with Factory Warranty

List Price: $US 433.00
Our Price: $US 241.53

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

Brand New with Factory Warranty

List Price: $US 485.00
Our Price: $US 270.63

Mastervolt Battery Mate 2503 IG Isolator, 200A, 3 Bank Battery, 83125035
Mastervolt Battery Mate 2503 IG Isolator, 200A, 3 Bank Battery, 83125035

Brand New with Factory Warranty

List Price: $US 523.00
Our Price: $US 290.03

Guest 2502 Isolator 2 Alternator, 2 Bank Battery, 70A

Brand New with Factory Warranty

List Price: $US 239.00
Our Price: $US 169.00


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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