Kevin, My boat wiring question is simple. Voltage Sensitive Relay or a Battery Isolator? I have a 2004 PolarKraft 165SC with a single 50 HP Yamaha 2 stroke. I also use a Guest 2-bank onboard AC changer. I really hate having to drag my accessory boat battery out to recharge it when away for a two week vacation in Canada.

So one or the other seems to be something I could really use. The VSR seems to be a more complex solution - at least from what I've seen on the net. The boat battery isolator seems to do the same thing quite simply. I've seen some isolators that have large heat sinks and some that don't (which are smaller and more expensive - but reviewers say they are better and it's worth it.) I think I just saw something about an ACR - is that another option? Can you offer any advice?? I've read a lot of your online advice and I'm still not clear on this.

MULTI-BATTERY ISOLATOR APPLICATION & INSTALLATION INSTRUCTIONS (For inboard & outboard marine applications refer to instruction 180119 - Marine Isolator Installation. Find great deals on eBay for Marine Battery Disconnect Switch in. Switch Marine Battery. Battery Isolator Switch Car RV Marine Boat 4 Position.

I think I read that this idea is not applicable to my boat? Also saw a nice diagram of the wiring, but you used both a VSR and an Isolator. I'm confused. Have I oversimplified the issue/decision, or perhaps I've missed something and it's more complicated.

Hi I would definitely use a voltage sensitive relay system over an isolator in your application. The VSR would connect between you battery's positive posts with a ground cable connecting the negatives. When either battery goes above 13.7 volts the VSR engages and both batteries are charging. If you used an isolator you would need to first isolate the alternator output wire from you outboard engine. Usually this is difficult. It is not just the positive battery cable. Since the alternator on the outboard is connected directly to the battery, if you added an isolator you would need to account for the voltage drop induced by the isolator.

This could be as much as 1 volt and will cause your batteries to not fully charge. An isolator is much easier to install on an inboard engine.

The alternator wiring is much easier to access. As for the confusion in terminology, BEP Marine calls their device a VSR.

Blue Seas call the device an ACR. Our Man In Paris Dexter Gordon Rar File. Both do the same thing and connect the same way. Hope this helps.

Marine Battery Isolator Marine Battery Isolator The battery isolator is very similiar to the battery switch in that it can charge two batteries and yet isolate the two.The difference being that there is no manual switch to operate using the battery isolator, its all automatic. There is pros and cons to both setups, with the battery isolator you have only one battery for the engine and one auxiliary battery for normally cabin use. Both batteries are charged by the engine and when one battery is discharged it will not drain the other. An isolator is basically a diode, a one way path through a circuit. There are different setups as with the battery switch such as dual engine installations and isolators that will charge more than two batteries. The battery switch can be manually switched between batteries to charge or start off from one or both batteries, where the isolator cannot. This is the most common setup for a single engine dual battery boat.

The way that the isolator is installed would be to disconnect the large charging wire from the alterntor, normally orange or red in color. This wire would normally attach on the other end at the starter where it would find its way back to the battery via the battery cable for charging. This wire would be capped off and taped back into the harness. Now a new wire (red or orange) of the same gauge, normally about an 8 gauge would be attached to the alternator and routed to the common on the isolator. Then the two remaining posts on the isolator are attached with the same gauge wire and routed to each positive end of the batteries. Route all wires out of the way of belts, and tie off the best as possible.

This is all that is needed for installation. Now one battery can be attached to the motor as normal, ground at block and positive at the starter. The other battery(normally deep cycle) will need to be grounded at the engine and the positive ran to the cabin fuse/breaker panel for lighting or other 12v use.

Note: Blue Water Marine is not liable for damages caused by improper installations or repairs. The information on these pages are for 'information only', not to replace manufacturers instructions. These pages are meant for helpful knowledge for the do-it-yourself, if you are not confident in what you are doing please leave the work for the experienced.

As with battery switches there are several different manufacturers of isolators available. Star Wars Jedi Knight Jedi Academy Mods Download Free. A battery isolator can be seen or purchased Blue Water Marine 8690 S. Oceana Drive, Montague Mi.