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Marine Battery Isolators

Galvanic corrosion problems can occur when your boat is connected to shore power and low-voltage DC currents come on board via the shore power ground wire. Galvanic isolation through the use of a marine battery disconnect switch or boat battery isolator can help you avoid this problem and save you from experiencing damaging corrosion to your boat's underwater metal parts such as the propeller, shaft, etc.

We're offering some fantastic discounted prices on our full lineup of Blue Sea battery isolators, Mastervolt isolation transformers and other top-name marine battery isolator switches. Our selection of ProMariner battery isolators includes units to handle either two or three batteries and ranges from 70 amp to 130 amp. Other top names include Newmar and Charles.

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Newmar Gi-30 Galvanic Isolator Newmar Gi-30 Galvanic Isolator
List Price: $220.00
Our Price: $162.88
You save $57.12!
7 in stock!
(7)
Blue Sea 7620 ML-Series Automatic Charging Relay (Magnetic Latch) 12v DC Blue Sea 7620 Ml-Series Automatic Charging Relay (Magnetic Latch) 12vdc
List Price: $274.99
Our Price: $176.28
You save $98.71!
9 in stock!
(1)
Mastervolt Battery Mate 1603 IG Isolator - 120A, 3 Bank Mastervolt Battery Mate 1603 Ig Isolator - 120a, 3 Bank
List Price: $381.77
Our Price: $294.52
You save $87.25!
1 in stock!
(1)
Newmar 1-2-120a Isolator 1ait 2batt 120amp Newmar 1-2-120a Isolator 1ait 2batt 120amp
List Price: $149.00
Our Price: $112.56
You save $36.44!
1 in stock!
Newmar 1-2-70a Isolator 1ait 2batt 70amp Newmar 1-2-70a Isolator 1ait 2batt 70amp
List Price: $80.00
Our Price: $66.12
You save $13.88!
Out of Stock
Newmar 1-3-120a Isolator 1ait 3batt 120amp Newmar 1-3-120a Isolator 1ait 3batt 120amp
List Price: $199.00
Our Price: $154.13
You save $44.87!
1 in stock!
Newmar 1-3-70a Isolator 1ait 3batt 70amp Newmar 1-3-70a Isolator 1ait 3batt 70amp
List Price: $120.00
Our Price: $95.70
You save $24.30!
Out of Stock
Newmar 2-3-120a Isolator 2ait 3batt 120amp Newmar 2-3-120a Isolator 2ait 3batt 120amp
List Price: $395.00
Our Price: $299.08
You save $95.92!
1 in stock!
Newmar 2-3-70a Isolator 2ait 3batt 70amp Newmar 2-3-70a Isolator 2ait 3batt 70amp
List Price: $220.00
Our Price: $169.65
You save $50.35!
1 in stock!
Newmar Bi-100 12v Battery Integrator Newmar Bi-100 12v Battery Integrator
List Price: $169.00
Our Price: $126.74
You save $42.26!
2 in stock!
Newmar Bi-24-100 24v Battery Integrator Newmar Bi-24-100 24v Battery Integrator
List Price: $185.00
Our Price: $138.07
You save $46.93!
Out of Stock
Newmar Gi-50 Galvanic Isolator Newmar Gi-50 Galvanic Isolator
List Price: $265.00
Our Price: $194.78
You save $70.22!
4 in stock!
(1)
Mastervolt Battery Mate 1602 IG Isolator - 120 Amp, 2 Bank Mastervolt Battery Mate 1602 Ig Isolator - 120 Amp, 2 Bank
List Price: $340.67
Our Price: $263.58
You save $77.09!
Out of Stock
Mastervolt Battery Mate 2503 IG Isolator - 200 Amp, 3 Bank Mastervolt Battery Mate 2503 Ig Isolator - 200 Amp, 3 Bank
List Price: $412.05
Our Price: $317.34
You save $94.71!
3 in stock!
Hubbel Hbl100aitssb 25kva 60hz Isolation Transformer W/Boost Hubbel Hbl100aitssb 25kva 60hz Isolation Transformer W/Boost (Truck Freight)
List Price: $10,249.88
Our Price: $6,288.73
You save $3,961.15!
Out of Stock
Hubbel Hbl100aitw 25kva 60hz Isolation Transformer White Hubbel Hbl100aitw 25kva 60hz Isolation Transformer White (Truck Freight)
List Price: $2,739.88
Our Price: $1,686.12
You save $1,053.76!
Out of Stock
Hubbel Hbl50aitssb 15kva 60hz Isolation Transformer W/Boost Hubbel Hbl50aitssb 15kva 60hz Isolation Transformer W/Boost (Truck Freight)
List Price: $7,749.88
Our Price: $4,756.57
You save $2,993.31!
Out of Stock
Hubbel Hbl50aitw 15kva 60hz Isolation Transformer White Hubbel Hbl50aitw 15kva 60hz Isolation Transformer White (Truck Freight)
List Price: $2,249.88
Our Price: $1,385.82
You save $864.06!
Out of Stock