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  1. Home
  2. DC Power
  3. Relays, Solenoids and Combiners

Relays, Solenoids and Combiners

Automatic charge relays are used to distribute charge to multiple battery banks. They achieve this by combining the banks while under charge and separating when the charge is not available.

Solenoids are used as remote battery switches. These solenoids provide remotely operated high amp switching under load and some also feature a local manual override which can be used as a service lockout.  Scroll down to the end of this section to see what the ABYC has to say about battery switches.

Take a look at my Blog post on how to set up a twin engine boat using remote switching.






I also have a category for Battery Accessories which are specifically designed for use with Lithium Ion Battery Banks but which share many of the functions shown here and are interchangeable in many cases.


Battery Protects


Battery Protects have moved to their own category

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Products [21]

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Blue Sea 7610 SI Series Solenoid120 Amp 12/24V ACR
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Blue Sea 7620 Solenoid ML Series 500A 12V ACR
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Blue Sea 7621 Automatic Charging Relay for 24 Volts
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Blue Sea 9012 Solenoid L Series 250A 12/24V with CE
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Blue Sea 7623 Solenoid ML 500A 24V ACR with manual Control
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Blue Sea 7717 Remote Battery Switch with lock - 24 Volt
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Victron Energy  BCD000802000 Argo BCD802 Diode Battery Combiner
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What the ABYC says about Battery Switches 

 11.6.1.2.1 A battery switch shall be installed in the positive conductor(s) from each battery or battery bank with a CCA rating greater than 800 amperes or 100 Ah if CCA is unavailable. 

and

11.6.1.2.2   A battery switch shall be mounted in a readily accessible location as close as practicable to the battery.

On most larger boats the second of these two provisions is impossible unless remote switching is used. If a manual switch is used it either wont be close to the batteries or it won't be accessible.  Below is a photo of a large remote switching and ACR setup on a large boat.



Remote battery management

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