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Blue Sea M-Series battery switch selectors allow users to switch between battery banks without power interruption. They are ideal for marine and RV applications because they are ignition protected, and made from non-corrosive marine grade metals.
These switches can be surface, front panel, or rear panel mounted which provides a wide array of mounting locations.
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Isolating cover with snap-on sections protects rear contacts
Molded in durable reinforced polycarbonate
Labeled with international ON/OFF legends
Tactile textures indicate knob position by feel only
Removable key or knob remains positively retained
ICON label set included for circuit identification
700 Amperes DC cranking rating
Blue Sea Systems
is this switch 3 prong or 4?
The switch has 4 positions (battery 1, battery 2, battery 1 and 2, and off).It had 3 terminals (battery 1, battery 2 and common)
morning,our sail boat don't have a engine, but I would a like to add a 2nd battery to the elec. system. Do I need on of this switchs?
Yes. Cam switch between batteris or can use power from both if needed. Would not leave the dock without having and using !
That depends on whether you want to route power to your electrical system from battery "A", or battery "B", or both at once.If you simply want to double the capacity of your battery bank, then "no, you don't need a switch."
Switch is good idea. You can change from one battery, when it gets low, to the second easily. Without a switch you must change the cables from the first battery to the second battery when you need it. The only other alternative is to hook up the batteries in a parallel mode (+ to +) and (- to -) and the batteries will go down simultaneously but should last twice as long.
What would cause switch to not turn off DC voltage from batterys?
Maybe its wired up wrong or has a short in it ???
I would guess that it is wired wrong on the terminals. I noticed that the terminals do not really line up with the markings on the face. I had to verify each terminal with a volt meter to make sure I was connecting the leads correctly. Should be an easy fix once you figure out the layout in the back. Hope this helps - Steve
I really don't Know. I would suggest that you re-check the way you have it hooked up. The diagram is a little hard to read. As I recall it was a little difficult to match the markings on the switch with the diagram.
Is knob or key removable in all positions?
Looking at the knob there is no screw or pin in the top or side of the knob, so I think you have to take it apart to remove the knob on the inside ???DAN
Yes, it is. I didn't realize it actually came off. That's how well it fits on. It turns in either direction smoothly and can be removed with a firm grip. The knob snaps on and off crisply.
Never tried to remove the the knob.Tried to pry it off with flat blade screw driver today.With effort it comes off in the off position.Tried other three positions. May come off with more force.But I didn't want to take a chance on breaking it.Sorry can't give you a better answer.
No. It does not appear that it can be removed unless you pull it off the shaft with considerable force. It may not go back on easily if you do. No set screw.
What the physical size of this switch? Thanks, Kent
The dimensions are 2 3/4" wide, by 2 3/4" height and 3" long (from the back to the tip of the knob). You have 3 mounting options Surface, Front panel or Rear panel, thank you.NathanJD Store(401)253-3840 ex130< a href="http://email@example.com" target="_blank">firstname.lastname@example.org< /a>
how do you hook it up?
I ordered the switch so as to be able to switch from battery 1 in my camper to battery 2, or turn both off, effectively turning off my 12 volt system. You can also turn both on at the same time. I no longer have the diagram for hooking it up, but as I remember it is a straitforward approach of hooking the cable from the alternator to the appropriate contact on the switch, then hooking the positive cables for each battery to the appropriate contact on the switch. Of course each battery must be grounded to the chassis. You will need 2 additional short cables for this.
I have 2400w at 48v DC input from my solar array. Want to switch between my current "grid-tie" inverter system and a new install "off-grid" battery based system. Ideally it would have a min continuous rating of 50a and 48v DC. I see the M-Series Battery Switch Selector has a DC rating of 32v, so advise if you have any other product meeting my needs?
Bruce the 32v rating generally describes the insulating qualities of the switch. Meaning if you were to use this switch at 48vdc, it could technically "arc" and cause a short circuit. Have you considered a transfer switch that is rated for AC current (house current)? You would likely only use one of the "poles" of the switch, but it would work fine on DC current as long as it was rated for your 50 amps of current (which is pretty low for a transfer switch). Hope this helps, - Steve
Carry a spare as noted
My new Nautique boat broke down on the lake. Upon opening up my dash, I found this switch had split in half so I had no battery connection. I managed to tape the contacts in long enough to get back to shore and immediately emailed Blue Sea systems. No response by the next day so I called them. 4 days later and still no response. The material they use is a very brittle bakelite plastic. They use machine screws to hold it together and the internal posts are not molded into the housing properly so they just snapped off probably because we hit a few big waves that shook the cabling. This is a boat so this product should have held up. I am still trying to contact the manufacturer but if not, I will install through bolts with a nut to hold the product together.
Unless this switch has been improved, carry a spare
Switch comes apart as screws holding pull out of base. Not long enough, fail about every 9 months. Might have had a production change to correct this as no replacement switches have failed. Boat is a 2013 model.
Great little battery switch
Great looking switch in black after a flush mount installation. Simple product that works flawlessly.
Battery Selector switch
A very good product,works well,has good dettents to keep it in position.Easy to install.Saves you a lot of trouble especially if you have asmall leak that drains your battery.