Blue Sea Systems 9004e e-Series Battery Switch, ON/Off AFD, Red

First thing I did when I bought a boat is install a second battery because a dead battery on the water is both likely, and extremely problematic. Or worse.If you've shopped for marine battery switches you've seen the "other" brand. The big round, surface-mounted one. Then you see this one and think, "it's just so small" or "how does it mount to my boat?"I took the leap of faith and couldn't be more pleased with the results.My first consideration was accessibility. I didn't want the switch to be buried inside a compartment that would make access difficult while on the water. That way I could easily switch between batteries when we're fishing, using the downriggers and playing music, and back to when we're running the main engine. The smaller size and flush-mounting capability of the Blue Sea switch were definite advantages in that regard.My other consideration was the power handling capacity of the switch, especially because of its smaller size. A quick look at the published specs shows continuous, intermittent and cranking ratings of 350A, 600A, and 2,000A respectively. Way more than needed for my application. Another bonus is the "make before break" design that keeps all of my electronics alive as I switch between batteries. I never switch with the main engine running.I invested another 10 bucks in a hole saw and drilled a hole in the battery compartment facing the cockpit, then installed the switch flush to the carpeted front face. Bolted it in with new stainless hardware, terminated the batteries and not only is it functional, but it also looks great. No telling about long-term reliability at this point, but I'm glad I opted for the built-in look and accessibility of this switch.

Liked ease of installation and the overall size.Added a second battery to my mule, needed switch to separate the batteries, has a winch and electric lift on a plow, rake and blade.Now has enough battery power.Great product!L. Jinks

Product was purchased to take the place of a Perko Brand that was hard to turn. It worked perfect, fit in the same space and much easier to turn the knob.

It showed up when they said it would. Easy straight forward set up. It allowed me separate my two batteries and keep one reserve to start my main motor if needed.

Didn't realize it doesn't come with mounting hardware.It does have plenty of room inside for multiple 4 gauge wires I give it 5 stars regardless of no mounting hardware.

Our previous battery switch corroded. We replaced it with this one. Quick and easy to install. Works perfectly. Cheaper on Amazon than most local stores.

Liked everything about it. High quality and fit performance replacement of original.

worked perfect and fast shipping

Very well made. Easy to follow instructions.

Todo bien llego rápido y bien protegido el producto trabaja excelente lo recomiendo

Well made and solid. Very happy. Just make sure you connect the right leads to the correct terminals on the back to avoid a fair bit of confused head scratching… It’s obvious and well labeled so just blame user error…

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Comprè este interruptor en una etapa inicial del Corona Virus. Considerè que podrìa demorar pero no me estresè en ese detalle pues consideraba con Fè que tendrìa buena calidad, ademà de ser un producto a un precio muy acequible.........PERO NUNCA ME LLEGÒ.Por eso le he puesto una estrella.