SKU: 78729111247

Blue Sea 350A Red e-Series Dual Circuit+ Battery Switch

Sale price$90.82 Regular price$100.91
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Ships within 48 hours · Estimated delivery Aug 23 - Aug 28

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Description

Blue Sea 350A Red e-Series Dual Circuit+ Battery SwitchSimplify Marine Power Management with the e Series Dual Circuit Plus Managing multiple battery banks on a vessel often involves complex wiring or the risk of draining your starting battery through house loads. The Blue Sea e Series Dual Circuit Plus Battery Switch offers a sophisticated solution by simultaneously switching two isolated battery banks with a single ON OFF knob. This intuitive design ensures that your engine starting battery remains

Simplify Marine Power Management with the e-Series Dual Circuit Plus

Managing multiple battery banks on a vessel often involves complex wiring or the risk of draining your starting battery through house loads. The Blue Sea e-Series Dual Circuit Plus Battery Switch offers a sophisticated solution by simultaneously switching two isolated battery banks with a single ON/OFF knob. This intuitive design ensures that your engine starting battery remains isolated from your house battery circuit, preserving critical cranking power while protecting sensitive electronics from voltage spikes during engine starting.

Simultaneous Switching and Isolation

Unlike traditional selector switches that force you to choose between batteries, the Dual Circuit Plus acts as two switches in one. When turned to the ON position, it connects the start battery to the engine and the house battery to the distribution panel simultaneously, yet keeps the circuits electrically separate. This isolation is crucial for modern boating; it allows you to run refrigerators, lighting, and audio systems from the house bank without the risk of depleting the battery required to start the engine. It effectively solves the common problem of accidental starting battery discharge while at anchor.

Emergency Parallel Functionality

Safety and redundancy are paramount in marine environments. In the event of a flat starting battery, this switch features a "Combine Batteries" position. By rotating the knob to this setting, you can parallel both battery banks, utilising the capacity of the house bank to provide the necessary amperage to start the engine. This built-in emergency cross-over eliminates the need for jumper cables or separate emergency parallel solenoids, providing immediate peace of mind when you are far from shore.

Engineered for Harsh Marine Environments

Built to withstand the rigours of the ocean, the e-Series switch features tinned copper studs for maximum conductivity and corrosion resistance. The 3/8"-16 (Approx. M10) terminal studs are designed to accept heavy-duty ring terminals, accommodating cables up to 4/0 AWG (Approx. 120mm²). The switch is rated for a continuous current of 350A per circuit, making it suitable for most small to medium-sized outboards and inboard engines.

Additionally, the unit is ignition protected, making it safe for installation in the engine rooms of petrol-powered boats. This safety rating ensures the switch will not ignite flammable fumes, a critical requirement for compliance and safety on board.

Make-Before-Break Design

The internal mechanism utilises a make-before-break contact design. This allows you to switch between the "ON" and "COMBINE" positions without momentarily cutting power, ensuring that GPS units, radios, and other sensitive electronics do not reboot or lose signal during critical switching operations.

Key Features

  • Dual Circuit Plus Design: Switches two battery banks simultaneously while maintaining isolation
  • Emergency Combine: Parallels banks to start the engine if the starting battery is low
  • High Current Rating: Handles 350A continuous current per circuit suitable for substantial loads
  • Ignition Protected: Safe for installation aboard petrol-powered vessels
  • Corrosion Resistant: Tinned copper 3/8"-16 (Approx. M10) studs ensure long-lasting electrical connections
  • Make-Before-Break Contact: Allows switching without interrupting power to electronics
  • Versatile Mounting: Case design supports surface or rear panel installation

Upgrade Your Battery System Today

Ensure your vessel's power system is safe, logical, and reliable. Install the Blue Sea e-Series Dual Circuit Plus Battery Switch to protect your engine battery and simplify your onboard power management.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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
SKU: 78729111247

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★★★★★ 5
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Reviewed in the United States on March 24, 2026
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Jeff
Carnegie, US
★★★★★ 5
this 27mm oil filter socket – it’s incredible. It’s the best.
Size: 27mm, Color: Red, Size: 27mm, Color: Red
Let me tell you something, folks – nobody changes oil like I change oil. Nobody. I’ve been around the best cars, the best mechanics, and let me just say, this 27mm oil filter socket – it’s incredible. It’s the best. I don’t know who made it, but I have to say, it’s tremendous. You know, people always ask me, "how do you do it? How do you change oil so perfectly?” And I tell them – it’s the tools. This socket is the reason why I can change oil faster and better than anyone. It fits perfectly on the filter, like it was made just for me, like everything else in my life. You slide it on, you give it a twist, and boom, you're done. It’s like magic – but not really, because magic is for others. This is skill. This is expertise. This is the power of the greatest tool ever made. You won’t find a better oil filter socket wrench. This tool makes you a winner. It’s precision-engineered, like the T-ump Tower of oil filter wrenches – big, strong, and reliable. And the best part? It’ll last forever. I’ve used it on many cars, and every time, it gets the job done with style. People will look at your work and say, “Who changed that oil? That’s perfect.” And you’ll know – it’s all because of the best socket out there. So, if you want to change oil like the greatest – you need this socket. It’s unbeatable. Believe me. You'll never go back to anything else
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Reviewed in the United States on December 24, 2025
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Verified Purchase
Jason
Lowell, US
★★★★★ 5
Fits perfectly
Size: 32mm, Color: Green
Works exactly as expected. Fits the 32mm oil filter housing perfectly and makes removal quick without slipping or rounding. Feels solid and well-made for the price. Used it for an oil change and it saved a lot of time compared to a strap wrench. Simple, effective tool—glad I bought it.
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Reviewed in the United States on May 28, 2026
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Mayelin Naranjo terga
Belleville, US
★★★★★ 5
worked for my dodge.
Size: 28mm, Color: Red
worked for my dodge. light but needs to not be so strong as to brake the plastic. seems like it will keep the plastic in tact and not kill it. nice and bright green i can find it easy.
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Reviewed in the United States on April 21, 2026
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Riley Smith
West Palm Beach, US
★★★★★ 5
Perfect Fit 28mm Fuel Filter Socket
Size: 28mm, Color: Red
I bought the Felisbieti 28mm fuel filter socket for a vehicle maintenance project, and it worked perfectly. The fit is precise, gripping the fuel filter securely without slipping or rounding edges. The build feels sturdy and durable, with a solid metal finish that stands up to repeated use. It fits snugly on my ratchet and made removing and installing the filter much easier and faster than using adjustable tools. The only minor thing to note is that it’s specific to 28mm filters, so make sure it matches your vehicle. Overall, this socket is well-made, reliable, and a must-have for anyone doing DIY fuel filter work.
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Reviewed in the United States on December 27, 2025

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