SKU: 78729111247

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

$90.82 $100.91
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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
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 78729111247

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4.3 ★★★★★
Based on 2138 reviews
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Verified Purchase
Adam Rainier
Louisville, US
★★★★★ 5
Makes Fantastic Cold Brew. Thoughtful Design. Slightly Frail, But Approaches Perfection.
Style: 51oz｜Conical Styles
When I looked for a dedicated cold brew pitcher, I had a few conditions. Mainly I wanted to avoid plastic at all costs. I needed a pitcher that would be easy to clean and simple to use, without pointless bells and whistles. Finally, I wanted a pitcher that could fit in my fridge without issue. This pitcher achieves all that and then some. Borosilicate is the same stuff Pyrex used to make its glassware from, a material renowned for its durability especially when exposed to quick temperature shifts. I knew it was overkill, but such material would surely fit the bill. And glass wouldn't affect the flavor of whatever coffee I'd brew in it. The grind holder is made from stainless steel, with a fine mesh that largely prevents sediment from getting into the coffee. It does allow smaller particles to get through, but they settle to the bottom. Overall I can't complain. The grind holder is suspended by a rubber ring which also locks the pitcher's lid in place. This forms a nice little seal that seems to help prevent leaking. Obviously there is no vacuum capability here, but it feels sturdy and like it won't let anything in or out once the grind holder is in. Pouring is easy and accurate. I remove the lid and grind holder, then pour. There's never any spillover nor dripping. The pitcher has a good, well-crafted pouring tip. Brewing with the pitcher takes a bit of practice. First I dump old grinds if necessary, then fill the grind holder roughly 3/4 of the way with cold brew grinds. BEFORE I place the grind holder into the pitcher, I fill the pitcher with water about 2 inches below the max line. After that, I place the grind filter into the pitcher then slowly press down on the grinds to flatten and wet them. Finally, I slowly pour water in to hit the max line, flattening the grounds as I do. While the pitcher has notches to determine how much liquid it holds, I don't find that feature helpful because I only use the pitcher with a grind holder which boosts the liquid. I imagine the notch lines may be more helpful for someone using this as a standard pitcher without the grind holder in place. I've accidentally overfilled this pitcher many times before deciding the best way, in my opinion, to handle it as described above. I've tried placing the grind holder in and then pouring all of the water over the grinds. But because grinds have a tendency to rise and overflow, that method proved messy and ineffective. This is why I add most of the water first, then only add a very small amount of water AFTER putting the grind holder into position just to top it off. So how good is the cold brew? After trying a few different approaches, I now brew mine in the fridge for convenience, letting it steep for about a week to make a nice dark roast concentrate with Bizzy Organic Dark & Bold grounds. The result is stellar, easily better than any coffee place cold brew I've had in the past couple of years. Filled to the max line, a full pitcher lasts me about 2 weeks when I have about an inch of coffee per day. I've found cold brew concentrate to be an extremely economical way to stretch costly grinds while creating the richest flavor and this pitcher is a key part of that. With this approach, I'm a happy customer. One thing I like to do while brewing a new batch of coffee is pouring about 1/3 of the brewed coffee into a tall cup and finishing that while brewing. This method has worked perfectly for me, as I have a new pot of coffee by the time I'm done with the old one. One thing to point out is that the pitcher is fairly big and the glass is relatively thin. And so I have always hand washed all parts of this pitcher, which has proven straightforward enough. While borasilicate and stainless steel should be dishwasher safe, this has become too important a piece of equipment for me to start playing around with. So I'm not the person to say how well it holds up in a dishwasher. My outlook is to treat this pitcher with the care it deserves and to be rewarded with its offerings for as long as possible. Overall the pitcher is an all-star at making the coffee I enjoy, being so simple to use that it becomes easy to take for granted. It is almost a trouble-free piece of kitchen hardware and has already paid for itself through sheer convenience. The quality definitely feels top notch, although the thinness of the glass means it needs to be treated with the care and respect it deserves. I would feel very comfortable recommending this product to almost anyone serious about making a quality cold brew at home.
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Reviewed in the United States on October 29, 2020
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Verified Purchase
Lance Seidman
Alexandria, US
★★★★★ 4
Better than expected (Updated)!
This is a simple and effective solution to making a good cold brew. Too bad the process takes forever (no fault to the product). BUT if you want a stronger taste, after using purified cold water (try to get beans wet), let it sit out for 12 hours or longer but then place in the fridge and you'll notice it darker and richer. It is impossible if you think some ground beans won't end up in your coffee, they will BUT when you pour, as long as you leave the metal ring in, a little bit of coffee (water) and the beans usually get stuck and don't come out. If you're really nuts about it, you can use a cheese cloth but a bit of grounds won't hurt you and not sure you'd really taste it as it's so fine, barely noticeable. Those who keep braking the glass? You must use cold water if you immediately start cleaning the pot. Do NOT run under hot water while the pot is cold, you or course will shatter the glass at some point. Update (07/29/2020) I am still using this product and no issues with it. But it does leave the coffee grounds smell to it no matter what beans I use, so wash with soap after every use. Be sure to know, water will evaporate and also get soaked up in the coffee beans, so adding a little more water above Max may be helpful. Also, pro tip, when you take out the insert with the beans, put it over the lid and tilt it and let it rest for 3 Mins so all the water from the beans pours out, do NOT force it with your fingers as you'll get more grounds and will have a harsh flavor.
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Reviewed in the United States on May 12, 2020
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Verified Purchase
Faye-Lee Chang
Draper, US
★★★★★ 5
Great for iced tea and easy to use
Style: 51oz｜Conical Styles
I use this for making iced tea and it works perfectly. You can use tea bags or loose-leaf tea, and both come out great. It’s easy to fill, strain, and clean, and I like that I can just keep it in the fridge and pour as I go. The airtight seal keeps everything fresh. Super convenient and a staple for my fridge now
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Reviewed in the United States on November 3, 2025
E
Verified Purchase
Elise Kennedy
Lowell, US
★★★★★ 5
Great for tea!
Style: 51oz｜Straight Styles
Love this pitcher! Use it for my NORA pregnancy tea to steep overnight in the fridge.
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Reviewed in the United States on May 2, 2026
A
Verified Purchase
Amazon Customer
Chelsea, US
★★★★★ 5
Beautiful, convenient and plastic free..but on the small size
Style: 51oz｜Conical Styles
I wanted a replacement for my Mr Coffee ice tea maker, which I loved, but I didn’t love the plastic, BPA free or not. Actually, I much prefer making tea in this tea maker. You need to plan ahead, to let it steep, but there is no need to deal with all the ice and dripping onto the counter like when using the Mr Coffee. I wanted to get the larger pot, but the larger sized variant is very tall and thin and would not fit in my refrigerator, even though I do have a good sized fridge. I do wish this one was a bit bigger, but for every day use this is just fine. I think it is simple and beautiful. Totally glad I purchased it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 19, 2026

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