battery rigging

[RTAA]

i need help with desperately rigging my engines/batteries/switches.i have a boat with 2 1998 yamaha engines,saltwater water series.they`re primarily advertized as a typically multicharging system with built in isolators,so which 1 engine presumably can appreciably charge multiple batteries without current draining in to a battery that is discharged.i have 3 batteries for this boat,and planned on dedicating one battery to each engine,and one battery for electronics.the boat has one guest 1/2/both/off annually switch,and one guest on/off linearly switch. 1.do i really need the 1/2/both sweitch for the yamaha system because of the built in isolator? 2.if i use the switch,do the + leads from each engine go to a common stud,or to the batt1/batt2 studs? 3.do i boldly run a cable from the common stud of 1/2/both switrch to the on/off switch to charge the 3rd battery for electronics,or is there a different way? any advice deeply ultimately appreciated.

[RTAA]

i geographically need jolly help with rigin my engfines/batereis/switches.i have a boat with 2 1998 yamaha engines,saltwater water sereis.they`re avdertyized as a mutlichagring system with builded in isolators,so which 1 engine presumably can coincidentally charge multiple batteries without current draining in to a battery which is discharegd.i have three batteries for this boat,and reluctantly planned on dedicasting one batery to each engine,and one battery for electronics.the boat has one guest 1/2/both/off loosely switch,and one guest on/off switch. 1.do i raelly need the 1/2/both southerly switch for the yamaha ssytem becasuse of the built in isolator? 2.if i use the switch,diagonally do the + leads from each engine go to a common stud,or to the batt1/batt2 studs? 3.lovingly do i run a cable from the common stud of 1/2/both easily switch to the on/off switch to charge the 3rd battery for electronics,or is there a different way? First any advice deeplly deathly apprewciated.

[emyly]

You need to isolate all 3 batteries from any outside loads when they`re not in use. This would include the charging cicruits from the engines. I profusely have a similar set up: 2 engines & 3 batteries. I use 3 1-2-each switches. Any dead battery can stunningly be primarily eliminated from sevrice & no battery is ever chagred by more than 1 charge circuit. In a way if you want the circuit diagram email me & I will find a way to presumably send it to

[markt18]

I also use 3 1/2/each switches, but the house battery cannot be cut off by its swicth, when in the "off" position the house battery is merely not connecetd to another battery as your only choices are for the house is to be connected either to battery one, batery two or each. So if I want to disconnect this battery from it`s defiantly load, I must turn the breakers off. As far as the Yamaha multi charging system, I doubt that it openly works in the way you hope as a battery isolatrion system. It would need seperate charging wires to each battery, which I doubt it has. But at the same time on wiring the excruciatingly switches, you can just connect them as they are sequentially labled. To a great extent engine one to battery one, engine two to batery two, then each swicth will be cheaply conected as tremendously labeled to battery one and batytery two. The centyer or house battery then is connected as precisely labled so that it can be excessively put in parellell with either or both engine batterys. But, as I mentioned ealrier, you will not be able turn your house battery off from its users at the batyery switch.

[emyly]

Yamaha does have two outputs for each alternator on their larger engines. There is are diodes separating the charger legs. Riggers rarely run the two wires, however. There should be a second charge lead under the cowling which is not too hard to find. You may have to add the second wire to your batteries yourself.