Blue Sea Systems 7610 Solenoid SI Series 120A 12/24V ACR

Blue Sea 7610 SI Series Solenoid120 Amp 12/24V ACR

On sale ~~$114.63~~ $87.96

Blue Sea Systems Automatic Charge Relay for 12/24 volts. Used to automatically combine batteries when charging and separate them when they discharging.

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p/n: BSS-0007610

Availability: 5 in stock

Quantity

Description
P65 Warning
Specifications
Additional information
Questions & Answers

This automatic battery combiner is suitable for small and medium sized boats and has a rating of 120 Amps. It can operate at 12 or 24 Volts DC. It automatically combines two battery banks when either of the batteries is being charged, and once the charge source goes away it separates the two banks again. The operation is completely automatic.

Allows temporary isolation of house loads from engine circuit during engine cranking to protect sensitive electronics

Automatically combines battery banks during the charging cycle and isolates under discharge

12/24 Volt auto ranging voltage input

Waterproof rated IP67 - temporary immersion for 30 minutes

Ignition protected - safe for installation aboard gasoline powered boats

LED light indicates when batteries are combined

Supports high-output alternators up to 120 Amperes

Automatically combines battery banks during the charging cycle and isolates under discharge

Activates from any charging source - alternators, battery chargers, or solar panels

Read my Blog Post on the use of the Start Isolation feature

Download the instruction manual here. Additional instructions here relating to wire size and circuit protection.

Tech Tip

The 7610 and the 7611 ACR's are almost identical and both do the same thing. The 7611 allows one more function though if you connect the auxiliary priority connection. It allows the 7611 to stay combined longer so you can tap some of the power in your start battery to run auxiliary loads. It will still disconnect the two batteries early enough to prevent your start battery running down too low to start your engine, but it does give a bit more flexibility for smaller systems to use some of the power of the start battery. See the manufacturers web page for more details

Q: Will this work if I install a second battery on my sea doo rxt 300. Does it charge one battery at a time or both at the same time?

Asked by: Jeff - 5/12/2017

A: You can use it on your Sea Doo, both batteries will charge at once. For smaller engines there is a smaller version of this, the 7601

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Answer provided by: Peter Kennedy (5/12/2017)

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Q: Does this device allow safe charging of dissimilar battery banks, e.g., deep cycle (for house battery - say two, 6 volt golf cart type batteries wired in series) and one FLA battery, e.g., 12 volt, 80 amp battery, for starting, with the priority set for charging the start battery first? Thanks

Asked by: Byron McCord - 7/14/2019

A: It might help answer this to think of the ACR as an automated on-off switch. It's on if one battery is above 13 volts, off otherwise. That is basically all it does (although it does have a couple of safety shutoff provisions for excessively high or low voltage) . If your battery characteristics are sufficiently similar then it will work for you, if they are really different then you will be combining them and will have to deal with whatever the consequences are. The switch doesn't have any smarts, the battery connected to the charge source will get charged first, the second battery in line will get charged when the parameters to connect (above 13 volts for 30 seconds) are met. The only "smart" thing the ACR has that is a time delay to prevent it turning on and off constantly when conditions are borderline.

Note that it doesn't work at all for Lithium batteries because the voltage of these batteries doesn't vary enough to give the cue when to combine.

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Answer provided by: Peter Kennedy (7/15/2019)

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Q: Can this unit be used with a starter batter of lead/acid wet and a house bank of AGM batteries

Asked by: brian hayden - 5/25/2020

A: The ACR will work no matter what batteries you use (except lithium) Its really a question of whether the batteries themselves will live happily together. Lead acid and AGM are close enough in characteristics that you can get away with it. I wouldn't do it if one of the batteries was Gel. This ACR doesn't work very well with lithium because the voltage of the battery stays high enough that the ACR tends to stay combined most of the time.

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Answer provided by: Peter Kennedy (5/26/2020)

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Specifications
Nominal Voltage	12V DC 24V DC
Start Isolation	Yes
Amperage Operating Current	175mA (combined) 15mA (open)
Terminal Stud Torque	140 in-lb (15.82 Nm)
Continuous Rating	120A
Intermittent Rating	210A (5 min)
Cable Size to Meet Ratings	1/0 AWG
Stud Material	Tinned Copper
Terminal Ring Diameter Clearance	1.12in (28.45 mm)
Terminal Stud Length	0.875in (22.23 mm)
Terminal Stud Size	3/8" - 16 (M10)
Relay Contact Position
Combine 30 sec	13.6V @ 12 V 27.2V @ 24 V
Combine 90 sec	13.0V @ 12 V 26.0V @ 24 V
Open 10 sec	12.35V @ 12 V 24.7V @ 24 V
Open 30 sec	12.75V @ 12 V 25.5V @ 24 V
Open High	16.0V @ 12 V 30.0V @ 24 V
Overvoltage Lockout	16.0V @ 12V 32.0V @ 24V
Undervoltage Lockout	9.5V @ 12 V 19V @ 24 V
Weight	1.25lb (0.57 kg)

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Blue Sea 7610 SI Series Solenoid120 Amp 12/24V ACR

Q: Will this work if I install a second battery on my sea doo rxt 300. Does it charge one battery at a time or both at the same time?

Q: Does this device allow safe charging of dissimilar battery banks, e.g., deep cycle (for house battery - say two, 6 volt golf cart type batteries wired in series) and one FLA battery, e.g., 12 volt, 80 amp battery, for starting, with the priority set for charging the start battery first? Thanks

Q: Can this unit be used with a starter batter of lead/acid wet and a house bank of AGM batteries

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