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Dual Pro B.O.S. Battery Optimization System - 12V - 2-Bank - BOS12V2
Dual Pro B.O.S. Battery Optimization System - 12V - 2-Bank - BOS12V2
Dual Pro B.O.S. Battery Optimization System - 12V - 2-Bank - BOS12V2
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Dual Pro B.O.S. Battery Optimization System - 12V - 2-Bank - BOS12V2

Marsoni M251S
Sale price$153.00
Pay 4 payments of $38.25 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Dual Pro B.O.S. Battery Optimization System - 12V - 2-Bank - BOS12V2Dual Pro B. O. S. Battery Optimization System 12V 2 Bank BOS12V2 B. O. S. Battery Optimization System 12V 2 Bank B. O. S. actively shuttles energy between batteries to keep the pack balanced, increasing battery strength and longevity. Batteries in a pack will become out of balance and the pack is only as good as its weakest link. In watercraft applications, this is further compounded when the trolling motor battery is used for peripherals and or to
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 988 reviews
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Product Reviews
J
Verified Purchase
Jerry D.
Birmingham, US
★★★★★ 5
Direct replacement on my 95 SeaRay 175
Size: PP67-712 V1
My boat started to have issues with not turning over when I used the ignition switch. Replaced the switch and had no effect. Replaced the solenoid and that fixed the problem. Good price, so I replaced all 3 solenoids (Trim/ starter). Solenoids had all needed hardware (nuts/washers)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 9, 2024
K
Verified Purchase
Kris Nicholas
Waukegan, US
★★★★★ 5
They Fixed My Boat
Size: PP67-712 V1
My boat wouldn’t start, and the outdrive wouldn’t go up or down. So I bought three of these solenoids and replaced the starter and both trim motor solenoids/relays. Now it starts right up with no problems and the trim motor is working again also. I have a 2006 Stingray boat.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2022
J
Verified Purchase
Josh T.
Bozeman, US
★★★★★ 1
Poor quality
Size: PP67-712 V1
Poor quality. Replaced a starter solenoid on a mercruser 4.3. Right off install it would click but not make a connection to start motor. Confirmed this was the culprit by jumping the terminals. After testing multiple times found it worked a little less than half the time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
E
Verified Purchase
Erin
Grantham, US
★★★★★ 5
Thick wires
Size: 4/0AWG, Color: 10ft Black + 10ft Red
Heavy duty for my solar set up. These wires are thick. I've never used such thick wires for anything. Now I know why they're so expensive. There was some weight to these wire too. The diameter is larger than a dime. These are some serious wire.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 25, 2025
O
Verified Purchase
OneShopStop88
Dallas, US
★★★★★ 5
Monster cable
Size: 4/0AWG, Color: 3ft Black + 3ft Red
Well I now know what 4/0 or 0000 cable is. Huge but very easy to handle or bend to shape.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2026

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