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Enter or verify that code JINGLE is in your cart at checkout, and a 10% discount will be applied to your order. Your savings will be based on the merchandise total only, excluding shipping, handling, additional freight, and taxes. This offer can not be combined with any other offer. Offer expires at 11:59pm ET 12/20/14. Other restrictions and exclusions may apply. Click here for full offer details

Blue Sea Systems Add-A-Battery Dual Circuit Battery Switch Only

Item # 87327
Customer Rating:

Key Features

  • Surface or rear panel mount

  • Supports alternators up to 120 amps

Our Price   $59.99

Availability: In Stock

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Product Description
blue_sea_systems The Dual Circuit Plus Battery Switch switches two battery banks simultaneously with one simple on/off switch, while still maintaining battery bank isolation and minimizing the risk of a dead start battery. The "Combine Batteries" function offers the ability to combine two battery banks in the event of a low start battery. Case can be surface or rear panel mount. Features 3/8" 16 tin-plated copper studs for maximum conductivity and corrosion resistance. The "Starting Isolation" Automatic Relay allows temporary isolation of house loads from engine circuit during engine cranking to protect sensitive electronics. Supports high-output alternators up to 120 amps. Built-in LED light indicates when batteries are combined. Waterproof rated IP67.

product reviews

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by PowerReviews
Blue Sea Systems Add-A-Battery Dual Circuit Battery Switch Only

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

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Battery Switch is PEFECT

By KWhit

from Moravia, IA

About Me Casual/ Recreational

Verified Buyer


  • Durable
  • Easy To Install
  • Must Have
  • Reliable
  • Waterproof


  • Kinda difficult 2 install

Best Uses

  • All boats

Comments about Blue Sea Systems Add-A-Battery Dual Circuit Battery Switch Only:

[...] This is such a great product and if you have a boat and like to listen to music all day while anchored down then this is a MUST HAVE!

  • Was this a gift?:
  • No

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q & a

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Do you have questions about this product? 4 easy ways to get the answers you need:

• Live Help - Real time help for basic questions. click here
• Customer Service - Use our online contact center to contact customer service and receive a response usually within 24 hours.
• Product Expert - Use our online contact center to contact our Product Experts to receive a response usually within 48 hours.
• Answer Box - Get answers from real customers by clicking "Ask a Question" below.

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3 Questions | 3 Answers
Displaying questions 1-3
  • Q:

    I am looking into buying this product but need to know if I need to buy extra cables to install an extra battery or does it come with everything I need except the extra battery.
    Asked on 11/1/2009 by Anonymous

    1 answer



      Yes, additional battery cables will be needed such as 21207 or 21212.

      Answered on 11/4/2009 by Bob from Overton's Tech
  • Q:

    I have a single battery and am looking to add a second battery. Is this switch all I need to accomplish this or do I need other items?
    Asked on 7/17/2009 by Jeff B from Viera, FL

    1 answer



      You will also need additional battery cables.

      Answered on 7/24/2009 by Casey Marine Buyer from Overtons
  • Q:

    Does this switch automatically select both batteries when needed.
    Asked on 5/4/2009 by Rich from Phoenix, Az

    1 answer



      This switch does not select batteries automatically.

      Answered on 6/8/2009 by Casey Marine Buyer from Overtons
Displaying questions 1-3

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