5 Best Marine Battery Combiners (Reviews Updated 2022)

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Electronics are used on boats for multiple purposes. Lights require electricity, as do speakers, receivers, navigation systems and many other pieces of equipment. Where there are electronics, there should be electrical terminals. A marine amp battery combiner allows two and sometimes more batteries to be automatically combined allowing a single charge source to charge multiple battery banks.

Best Marine Battery Combiner

Here are our Marine Battery Combiner reviews.

1. Blue Sea Systems Automatic Charging Relays

Blue Sea Systems Automatic Charging Relays (acrs)

The Blue Sea Systems Automatic Charging Relays is a high quality marine battery combiner. This combiner is available in both 12v and 24v power depending on the requirements. It is made by a reputable marine manufacturer.

  • Protects sensitive electronics
  • Designed for 12 or 24v systems
  • Ignition protection for easy installation
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2. Marine Boat 4-Way Battery Selector Switch

Marine Boat 4 Way Battery Selector Switch

The Marine Boat 4-Way Battery Selector Switch is a versatile 4 way battery selector ideal for use on boats. This marine battery combiner is ruggedly built and is composed of Bakelite housing, copper washers and solid brass terminals.

  • Rated for 300 amps continuous use at 6v and 150 amps at 12v
  • Includes automatic alternator
  • Protects valuable boat electronics
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3. Victron Intelligent Battery Combiner Cyrix

Victron Intelligent Battery Combiner Cyrix

The Victron Intelligent Battery Combiner Cyrix is a good deal on an intelligent marine battery combiner. This piece of equipment is a n excellent replacement for diode isolators. The main feature is no voltage loss which protects the alternator and battery.

  • Protection against overheating
  • 5 year warranty included
  • Parallel connection in case of emergency
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4. YANDINA Combiner 200

Yandina Combiner 200

The YANDINA Combiner 200 is an efficiently-built marine battery combiner. This product combines durability with lightweight design making it ideal for usage on a boat. It is under an unlimited warranty for quality assurance.

  • For alternators rated up to 200 amps
  • Waterproof & vapor proof
  • Draws no current when not charging
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5. Blue Sea Systems Add-A-Battery Kit

Blue Sea Systems Add A Battery Kit

The Blue Sea Systems Add-A-Batter Kit is a simple and effective combiner for marine purposes. This item combines batteries for emergency starting and uses tin-plated copper studs for maximum conductivity and corrosion resistance.

  • Includes E-series dual circuit plus battery switch
  • Shares the charge between two batteries
  • 12/24 volt compatibility
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Marine Battery Combiner Buyer’s Guide

Choosing a marine battery combiner is an important investment for a boat owner.  Prices are not too high, usually around the $50 mark.  While the price may seem quite low, a good portable combiner is well worth investing in.  A portable combiner is not a required piece of equipment on a boat, but if the boat needs use multiple types of battery powered equipment needs it is required.

Our buying guide reviews the best marine battery combiners on the market so you can choose the right marine battery combiner for your boat.   The following features are included on most marine battery combiners and will help you to choose which features you need on a marine battery combiner for your boat.


Boat marine battery combiners are used to charge the batteries onboard a boat, therefore they need to give out certain amounts of power. Many combiners will give out 12v of power, whilst being compatible with 6v batteries also. Combiners which feature a dual design are capable of charging two batteries at once and therefore require more power.


Marine battery combiners should ideally be quick and easy to install. Look for one which includes the necessary bolts and hardware this will speed up the process and have you out on the water using your marine battery combiner in no time.


Marine battery combiners are made of corrosion-resistant materials because they are installed at the bow of the boat where they may be exposed to and sea spray.  Common materials include stainless steel, plastics and other metals.  Be sure to buy a marine battery combiner that is made of high-quality materials for a long service life.  Stainless steel is the strongest and best choice for long term use.

Safety Features

Marine battery combiners should be fitted with certain safety protection features. These features include reverse polarity, spark-proof technology, thermal protection, ignition protection and protection from over charging. These features ultimately ensure that the battery combiner is as safe as possible and minimize the risk of anything going wrong.