Yamaha charging circuit

[sleepyboat]

I got the inverter option on my 23, having had one on my 27. I would use it for the micro wave, hair drier and charging batteries on various items. I always did this while running the engine. The 4BY had an alternator. The Yamaha has a rotor, stater on the flywheel. I will very rarely be on a dock for power. The water heater is 750 watts. The inverter is 1500 watts. Doing the math one would assume this is doable. What I would like to do is turn on the water heater while I'm traveling to a destination.

Those are the facts of the matter. Starting with fully charged batteries (solar panel) is there any possibility of damage to the charge circuit of the Yamaha? I think that the engineers worked out the numbers and would not offer an inverter if this possibility existed.

Please, I'm not looking for opinions. I’ve done the math and have my own. I am hoping the factory has a Yamaha guy or girl on staff to field these questions.

Thanks,
John

 

[SGIDAVE]

Hello John,

While you wait for the factory to answer...

What is the alternator output of the Yamaha?

/dave

 

[sleepyboat]

Dave,
Sorry, I do not have an answer for that. I'm also not sure you can call the rotor, stater on the flywheel an alternator at least not what we are use to seeing on the diesels. But for now alternator will have to do, so we are all on the same page.
Thanks,
John

 

[NorthernFocus]

Also while waiting for a response from Ranger...

There is no functional difference between the charging system on an outboard and the alternator on an inboard. With the batteries between load and charger you don't have to worry about damaging the charger. If it can't supply enough amps the charge system will be self-protecting. Your batteries will simply draw down if the load is greater than the supplied charge.

 

[Scuffy]

Yamaha's website spec page states 50 amp alternator output on the 200 hp engine.

 

[sleepyboat]

I did finally find the output but there were three different engine configurations for the 200 and the one they are installing is the F200XCA. Dave was correct with fifty amps of output that occurs at about 2200 RPM’s. I will probably try the water heater off the rectifier and watch the voltage and signs of smoke from the cowl, unless otherwise instructed!
John

 

[ronnieg]

I got the inverter option on my 23, having had one on my 27. I would use it for the micro wave, hair drier and charging batteries on various items. I always did this while running the engine. The 4BY had an alternator. The Yamaha has a rotor, stater on the flywheel. I will very rarely be on a dock for power. The water heater is 750 watts. The inverter is 1500 watts. Doing the math one would assume this is doable. What I would like to do is turn on the water heater while I'm traveling to a destination.

Those are the facts of the matter. Starting with fully charged batteries (solar panel) is there any possibility of damage to the charge circuit of the Yamaha? I think that the engineers worked out the numbers and would not offer an inverter if this possibility existed.

Please, I'm not looking for opinions. I’ve done the math and have my own. I am hoping the factory has a Yamaha guy or girl on staff to field these questions.

Thanks,
John

Hi John,
if you run the Yamaha above 2500 rpm your alternator will keep up on the batteries. Anything below you will only be getting less than 20% output from the alternator. This will not allow the batteries to keep up with the output of the invertor. As long as the engine battery is fully charged the ACR will remain open and keep the house charged
The water heater is less than 15 amp draw.
I would never suggest using a hair dryer on a invertor.
As Always I suggest power management on all vessels.
Hope this will help

 

[sleepyboat]

Thanks Ronnie,
I wanted to use the water heater if possible without shore power and not break anything. The numbers looked good to work it off the inverter but wanted to be sure. Power, water and beer all have to be managed carefully. Sometimes there is no going back!
Best regards,
John