Battery Isolators

A Battery Isolator allows you to charge two or more different types of marine batteries like a Deep – Cycle Flooded & a Cranking Battery from your engine’s alternator, without them discharging each other. On many fishing boats it’s not uncommon to see a Battery Isolator installed that separates the starting battery from the electronics battery. To select the correct Battery Isolator(s) for your vessel first count the number of alternators you have, second determine what the amperage output of each alternator is and third determine how many batteries do you want your system to charge. Once you’ve answered those questions then its relatively easy to select the correct Battery Isolator for your marine application. Captain’s Marine Supply stocks the Mastervolt & ProMariner line of battery isolators. Shop these & all of our other quality marine products today and remember to always “Be Prepared on the Water”.       

18 products found in Battery Isolators

Mastervolt Battery Mate 1602 IG Isolator - 120 Amp, 2 Bank
  • $331.99
Mastervolt Battery Mate 1603 IG Isolator - 120A, 3 Bank
  • $371.99

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Mastervolt Battery Mate 2503 IG Isolator - 200 Amp, 3 Bank
  • $401.99
ProMariner Battery Isolator - 1 Alternator - 2 Battery - 130 Amp
  • $116.99
Promariner Battery Isolator - 1 Alternator - 2 Battery - 70 Amp
  • $83.99
ProMariner Battery Isolator - 1 Alternator - 3 Battery - 130 Amp
  • $151.99
ProMariner Battery Isolator - 1 Alternator - 3 Battery - 70 Amp
  • $103.99
ProMariner Battery Isolator - 2 Alternator - 2 Battery - 130 Amp
  • $240.99
ProMariner Battery Isolator - 2 Alternator - 2 Battery - 70 Amp
  • $144.99
ProMariner Battery Isolator - 2 Alternator - 3 Battery - 130 Amp
  • $342.99
ProMariner Battery Isolator - 2 Alternator - 3 battery - 70 Amp
  • $179.99
ProMariner ProIsoCharge Battery Isolator 120Amp 1-Alt 2-Bat - 12V
  • $138.99
ProMariner ProIsoCharge Battery Isolator 120Amp 1-Alt 3-Bat - 12V
  • $148.99
ProMariner ProIsoCharge Battery Isolator 130Amp 2-Alt 4-Bat - 12V
  • $273.99
ProMariner ProIsoCharge Battery Isolator 180Amp 1-Alt 2-Bat - 12V
  • $157.99
ProMariner ProIsoCharge Battery Isolator 180Amp 1-Alt 3-Bat - 12V
  • $189.99
ProMariner ProIsoCharge Battery Isolator 250Amp 1-Alt 2-Bat - 12V
  • $179.99
ProMariner ProIsoCharge Battery Isolator 250Amp 1-Alt 3-Bat - 12V
  • $217.99