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Blue Sea Systems 7650 Add-A-Battery Kit
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | Blue Sea Systems |
Size | No Size |
Item Weight | 1.5 Pounds |
Terminal | Through Hole |
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About this item
- Don't get stranded - Add a Battery
- Simplifies switching; Isolates engine and house circuits; Combines batteries for emergency starting
- Shares the charge between two batteries more efficiently than a battery isolator
- Tin-plated copper studs for maximum conductivity and corrosion resistance
Frequently bought together
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From the manufacturer
Blue Sea Systems Add-A-Battery Kit
Product Details
The ADD-A-BATTERY is as simple to operate as an ON-OFF switch, yet effectively manages the switching and charging of two batteries from a single charge source
The Add-A-Battery includes a Dual Circuit Plus Battery Switch and an Automatic Charging Relay. These components simplify switching and automate charging, so that all you have to do is turn the battery switch ON when you arrive and OFF when you leave.
Dual Circuit Plus Battery Switch
- Simplifies switching
- Isolates engine and house circuits
- Combines batteries for emergency starting
- Tin-plated copper studs for maximum conductivity and corrosion resistance
ACR Automatic Charging Relay
- Automatically combines batteries during charging
- Isolates batteries during engine cranking and when not charging
- Shares the charge between two batteries more efficiently than a battery isolator
- Allows efficient dual battery charging without needing regulator adjustment or rewiring
What's in the box
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Product information
Product Dimensions | 6 x 5 x 4 inches |
---|---|
Item Weight | 1.5 pounds |
ASIN | B000RZNP5K |
Item model number | 7650 |
Batteries | 1 Unknown batteries required. |
Customer Reviews |
4.8 out of 5 stars |
Best Sellers Rank | #19,586 in Automotive (See Top 100 in Automotive) #31 in Automotive Replacement Battery Switches |
Is Discontinued By Manufacturer | No |
Date First Available | October 1, 2001 |
Department | mens |
Manufacturer | Blue Sea Systems |
Country of Origin | USA |
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Product Description
Adding a second battery to the electrical system prevents the unintended discharge of the engine start battery. Blue Sea Systems popular Add-A-Battery kit was primarily designed for boats with alternator output of 120A or less. When installed, the Add-A-Battery isolates the start battery from the house loads which prevents the discharge of the start battery. The Add-A-Battery offers a simple way to control the charging and battery switching of two battery banks. The E-Series Dual Circuit Plus Battery Switch simplifies the switching while the SI-ACR automates charging between two batteries.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the quality, performance, ease of installation, and battery of the electronic switch. For example, they mention it's well-made, works great for their needs, and is easy to install. That said, some appreciate the ability to combine batteries if needed.
AI-generated from the text of customer reviews
Customers are satisfied with the quality of the electronic switch. They mention that it is well-made, and easy to install. Customers also appreciate the simplicity and the ease of setup. Overall, customers are happy with their purchase and recommend it to others.
"...For the product itself, it is very solidly made, and has been working flawless...." Read more
"...In summary this is a high quality and robust kit from a high quality company. HIGHLY RECOMMENDED." Read more
"...One battery to run the ACC. One battery for the engine. Great kit and easy to install. Really saves my battery...." Read more
"Blue Sea systems makes quality products this is my second one for a boat this time...." Read more
Customers find the installation of the electronic switch to be easy. They mention that the instructions are good, simple, and simple. Some say that the system was easy to install and that the included instructions have a recommended circuit diagram.
"...SIMPLE SIMPLE SIMPLE." Read more
"...There is a recommended circuit diagram in the included instructions, and there are several other slightly different variations on Blue Sea's website..." Read more
"...One battery for the engine. Great kit and easy to install. Really saves my battery. Gives me peace when long days out on the lake...." Read more
"Works exactly as described and easy to install. Helps keep your boats battery banks charged." Read more
Customers are satisfied with the performance of the electronic switch. They say that it works great for their needs, is functional, and is a great device. Customers also appreciate the automatic switch and the optional switch, which allows for some particularly handy options.
"...For the product itself, it is very solidly made, and has been working flawless...." Read more
"...The switch is actually optional, but it allows some particularly handy options...." Read more
"Works exactly as described and easy to install. Helps keep your boats battery banks charged." Read more
"This works great for my needs...." Read more
Customers like the battery. They say it's a great feature that allows them to run independently. They like that the battery can be combined if needed, and that it keeps both batteries charged. Some like that it prevents anything on the boat from draining both. Overall, customers are happy with the product and recommend it to others.
"This is an excellent kit for adding a battery to your 4x4...." Read more
"...One battery to run the ACC. One battery for the engine. Great kit and easy to install. Really saves my battery...." Read more
"Used all summer and it performed as it should, both batteries were able to run independently until charging required. No issues" Read more
"...Keeps both batteries charged and prevents anything on the boat from draining both batteries. No more being stranded because of a dead battery." Read more
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Also, when I was speaking to the tech I mentioned I was I was worried about the 120 amp rating of the unit when the ACR engages. If there is a big voltage differential between the two batteries, there would be a surge of current across the ACR when it connects the two batteries. This 120 Amp is a continuous rating and the ACR will not engage the circuit if there is too big of voltage difference. This would be a case where one battery is bad, has a bad cell or has an extremely high load on it and cannot maintain a high enough voltage. The ACR will disengage and will try to isolate the batteries in that case. In continuous operation the ACR would really only see the total amount of output that the alternator could generate. In my case this is about 100 amps so the 120 amp ACR unit is sufficient.
For the product itself, it is very solidly made, and has been working flawless. I had a Pergo basic 1, 2, 1+2, Off switch in my boat, and got tired of trying to remember to flip the switch to 1 when anchored out, then back to 1+2 when cruising around. With this no need for any of that. Just turn the main switch on when I’m getting all the stuff loaded in, and off when we put it in storage. SIMPLE SIMPLE SIMPLE.
Also, when I was speaking to the tech I mentioned I was I was worried about the 120 amp rating of the unit when the ACR engages. If there is a big voltage differential between the two batteries, there would be a surge of current across the ACR when it connects the two batteries. This 120 Amp is a continuous rating and the ACR will not engage the circuit if there is too big of voltage difference. This would be a case where one battery is bad, has a bad cell or has an extremely high load on it and cannot maintain a high enough voltage. The ACR will disengage and will try to isolate the batteries in that case. In continuous operation the ACR would really only see the total amount of output that the alternator could generate. In my case this is about 100 amps so the 120 amp ACR unit is sufficient.
For the product itself, it is very solidly made, and has been working flawless. I had a Pergo basic 1, 2, 1+2, Off switch in my boat, and got tired of trying to remember to flip the switch to 1 when anchored out, then back to 1+2 when cruising around. With this no need for any of that. Just turn the main switch on when I’m getting all the stuff loaded in, and off when we put it in storage. SIMPLE SIMPLE SIMPLE.
The switch is actually optional, but it allows some particularly handy options. Depending on how you wire it, you can use the switch to turn off the whole system, to use both batteries independently and to electrically combine both batteries through the high current switch. Combining the batteries would allow a self jump start in the event of a dead battery, or to increase the power available when winching.
Realize with this kit you will still need appropriate wiring, fuses at the batteries, a ground bus, and several hours to install properly. You will also need some understanding of electrical circuits and how they work. There are several equally good and safe ways to install the add a battery kit. There is a recommended circuit diagram in the included instructions, and there are several other slightly different variations on Blue Sea's website. I thought both the included instructions and the website information very helpful.
In summary this is a high quality and robust kit from a high quality company. HIGHLY RECOMMENDED.
Reviewed in the United States on September 13, 2023