Boat Battery Isolators & Charging Relays

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Promariner Marine Battery Isolators, 1-2 Alternator, 2-3 Batteries, 70/130 Amp
    Isolators allow one or more devices to charge multiple battery banks, allowing current to flow in only one direction, preventing batteries from …
    List price: $91.53
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    API Battery Isolators
      These automatic solid state devices allow you to connect your engine alternator directly to both batteries or multiples of batteries without fear of …
      List price: $70.00
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      $63.45
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      30A Fail Safe Galvanic Isolator - Guest (Marinco)
        Product Features: Prevents the electroplating action that occurs on boats with AC power feeds Voltage Rating: 115/230VAC Frequency Rating: 50/60Hz …
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        $262.95
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        50/60A Fail Safe Galvanic Isolator - Guest (Marinco)
          Product Features: Voltage Rating: 115/230VAC Passes necessary AC ground current for shore power safety Frequency Rating: 50/60Hz Current Rating: 50/ …
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          $331.05
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          ProMariner ProIsoCharge Battery Isolator 120Amp 1-Alt 3-Bat - 12V
            ProIsoCharge Series Model ProIsoCharge120 1•3™ Part No. 23124 System Volts DC 12 Max DC Amps 120 Amp Alternator Input 1 Battery Outputs 3 …
            List price: $210.39
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            ProMariner ProIsoCharge Battery Isolator 120Amp 1-Alt 2-Bat - 12V
              ProIsoCharge Series Model ProIsoCharge120 Amp, 1 Alt, 2 Battery Part No. 23121 System Volts DC 12 Max DC Amps 120 Amp Alternator Input 1 Battery …
              List price: $196.30
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              ProMariner ProIsoCharge Battery Isolator 180Amp 1-Alt 3-Bat - 12V
                ProIsoCharge Series Model ProIsoCharge180 1•3 Part No. 23125 System Volts DC 12 Max DC Amps 180 Amp Alternator Input 1 Battery Outputs 3 Size 7. …
                List price: $269.36
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                ProMariner ProIsoCharge Battery Isolator 130Amp 2-Alt 4-Bat - 12V
                  ProIsoCharge Series Model ProIsoCharge130 2•4 Part No. 23127 System Volts DC 12 Max DC Amps 130 Amp Alternator Input 2 Battery Outputs 4™ …
                  List price: $387.83
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                  ProMariner ProIsoCharge Battery Isolator 250Amp 1-Alt 3-Bat - 12V
                    ProIsoCharge Series Model ProIsoCharge250 1•3 Part No. 23126 System Volts DC 12 Max DC Amps 250 Amp Alternator Input 1 Battery Outputs 3 Size 8. …
                    List price: $308.86
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                    ProMariner ProIsoCharge Battery Isolator 180Amp 1-Alt 2-Bat - 12V
                      ProIsoCharge™ Series Model ProIsoCharge180 1•2 Part No. 23122 System Volts DC 12 Max DC Amps 180 Amp Alternator Input 1 Battery Outputs 2 …
                      List price: $224.29
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                      $180.75
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                      ProMariner ProIsoCharge Battery Isolator 250Amp 1-Alt 2-Bat - 12V
                        ProIsoCharge Series Model ProIsoCharge250 1•3 Part No. 23123 System Volts DC 12 Max DC Amps 250 Amp Alternator Input 1 Battery Outputs 2 Size 6. …
                        List price: $254.34
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                        70 Amp 2 Alternator 3 Bank Battery Isolator - Charles
                          All Charles Battery Isolators are ignition protected and prevent over-charging. They feature a heat chamber design, protective boots on heavy-duty 5/ …
                          List price: $239.52
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                          $195.15
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                          130 Amp 1 Alternator 2 Bank Battery Isolator - Charles
                            All Charles Battery Isolators are ignition protected and prevent over-charging. They feature a heat chamber design, protective boots on heavy-duty 5/ …
                            List price: $219.07
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                            $178.55
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                            190 Amp 1 Alternator 3 Bank Battery Isolator - Charles
                              All Charles Battery Isolators are ignition protected and prevent over-charging. They feature a heat chamber design, protective boots on heavy-duty 5/ …
                              List price: $296.63
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                              $241.75
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                              160 Amp 1 Alternator 2 Bank Battery Isolator - Charles
                                All Charles Battery Isolators are ignition protected and prevent over-charging. They feature a heat chamber design, protective boots on heavy-duty 5/ …
                                List price: $241.08
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                                $196.45
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                                70 Amp 1 Alternator 3 Bank Battery Isolator - Charles
                                  All Charles Battery Isolators are ignition protected and prevent over-charging. They feature a heat chamber design, protective boots on heavy-duty 5/ …
                                  List price: $169.42
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                                  $138.05
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                                  60 AMP FAIL SAFE GALVANIC ISO - ProMariner
                                    Failsafe galvanic isolators interrupt galvanic current with other boats in your marina when installed on a boat which is connected to shore power. It …
                                    List price: $442.89
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                                    30 AMP FAIL SAFE GALVANIC ISO - ProMariner
                                      Failsafe galvanic isolators interrupt galvanic current with other boats in your marina when installed on a boat which is connected to shore power. It …
                                      List price: $332.69
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                                      Remote Battery Switches - ML-Remote Battery Switches -Blue Sea Systems
                                        500 Amp magnetic latching (bi-stable) switch provides high-amp switching under load, manually or from remote locations Manual override knob provides …
                                        List price: $212.87
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                                        $180.94
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                                        Blue Sea Systems Si-Series Automatic Charging Relay
                                          Automatically manages the charging of two battery banks and isolates batteries during starting to protect sensitive electronics. 120 Ampere …
                                          List price: $109.97
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                                          $90.66
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                                          L-Series Solenoid Switch
                                            Hermetically sealed contacts, vaporproof. Ignition protected. Pulse circuit requires very low current draw when contact is closed. Input voltage: 9 …
                                            List price: $216.99
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                                            $174.17
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                                            Mini Battery Switch & Auto Charging Relay 65 Amp - Blue Sea Systems
                                              Simplifies switching and automates charging for a complete two battery bank solution for outboard powered boats. The Mini Add-A-Battery offers a …
                                              List price: $119.49
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                                              $92.98
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                                              Battery Isolator (Marinco/Guest/Afi/Nicro/Bep)
                                                Optimized heat sink design for maximum performance. Minimized voltage drop across isolation barrier using Schottky type diodes. Each output …
                                                List price: $212.79
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                                                $180.23
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                                                Battery Isolator (Pro Mariner)
                                                  Rated for 70 amps maximum alternator. Operates on 6, 12, 24 & 32 volt negative ground systems. Electrical current able to flow from DC source …
                                                  List price: $91.53
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                                                  Battery Isolator (Marinco/Guest/Afi/Nicro/Bep)
                                                    Connect engine alternator to two batteries or battery banks for independent battery charging. Isolates batteries and prevents a higher charged …
                                                    List price: $82.69
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                                                    $68.38
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                                                    Heavy Duty Battery Isolator (Cole Hersee)
                                                      For 12-36 volt, DC negative ground electrical systems. Isolate each battery to prevent the battery with the higher charge from draining into the …
                                                      List price: $87.79
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                                                      $65.04
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                                                      Fail-Safe Galvanic Isolator (Marinco/Guest/Afi/Nicro/Bep)
                                                        Prevent galvanic corrosion between boats due to dissimilar metals. Gold plated terminals provide superior corrosion resistance for harsh environment …
                                                        List price: $382.29
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                                                        $298.47
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                                                        Iso-Guard Isolation Transformers (Charles Marine Products)
                                                          Designed to be a viable alternative to using a galvanic isolator with status monitor, as is now required by ABYC. Offers all of the benefits and …
                                                          List price: $705.99
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                                                          $607.14
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                                                          Blue Sea 7622 ML-Series Heavy Duty Automatic Charging Relay - Blue Sea Systems
                                                            7622 Manual Control: Yes Coil Voltage: 12v Features: Manual control switch provides an added level of safety allowing control with or without power, …
                                                            List price: $261.63
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                                                            $222.45
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                                                            Automatic Charging Relay, 65A 12V - Blue Sea Systems
                                                              Automatically combines batteries during charging, isolates batteries when discharging or at rest. 65 Amp continuous rating manages the charging …
                                                              List price: $69.09
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                                                              $58.72
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                                                              Blue Sea 7620 ML-Series Automatic Charging Relay (Magnetic Latch) 12v DC - Blue Sea Systems
                                                                7620 Manual Control: No Coil Voltage: 12V DC Combines battery banks during charging and isolates under discharge 300 Ampere continuous rating …
                                                                List price: $245.67
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                                                                $208.85
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                                                                Maretron DCR100-01 Direct Current Relay Module
                                                                  Maretron's DCR100 contains 6 Direct Current (DC) relays, each capable of switching up to 10amps. The DCR100 connects directly to an NMEA 2000 network, …
                                                                  List price: $395.00
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                                                                  $333.75
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                                                                  39 Items | 1 of 2 pages
                                                                   1 2
                                                                  Boating Know How
                                                                  ACR

                                                                  Selecting the Correct Automatic Charging Relay

                                                                  When selecting a particular Automatic Charging Relay (ACR), there are many things to consider in order to get the correct system for your application. You will need to ... read more take into account the continuous rating and the intermittent rating. The continuous rating will need to reach levels above the highest alternator output rating, and the intermittent rating will need to be above the biggest load for the battery. You will then need to carefully consider which preset ACR settings to choose, followed by the product features.

                                                                  Preset ACR Settings



                                                                  Combine Voltage:
                                                                  • Batteries will share the present charge.
                                                                  • Voltage:13.0 at 2 minutes.
                                                                  • Closed relay and combined batteries.
                                                                  Open Voltage:
                                                                  • No present charge; charge input loads will not exceed set limit.
                                                                  • Voltage: 12.75 at 30 seconds.
                                                                  • Batteries do not share the charge.
                                                                  Under Voltage Lockout:
                                                                  • Charge may or may not be present.
                                                                  • Voltage: 9.5.
                                                                  • Batteries do not share the charge.

                                                                  Product Features


                                                                  Auxiliary Battery Priority (Optional):
                                                                  • Combines batteries and closed relays for extended length of time.
                                                                  • Open voltage ranging between 12.25 and 12.75 volts.
                                                                  • Engine must be running.
                                                                  Start Isolation (Optional):
                                                                  • Batteries are isolated, and the relay is open.
                                                                  • Vulnerable products will be shielded by isolated batteries.
                                                                  • Engine must be starting.
                                                                  Start Assist:
                                                                  • Closed relay, combined batteries.
                                                                  • Batteries share power.
                                                                  • Engine must be starting.
                                                                  Engine Isolation:
                                                                  • One relay will be open, while the other will be closed.
                                                                  • Two engines must be running.

                                                                  We do recommend consulting with a mechanic or technician in the process of choosing an ACR and its features.
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