Add on altenator size???s

[dave phelps]

Ok guys how many amp altenator do you think i need to run lights on an attex?? I'm looking to put a mini denso type 1 wire cause my space is limited, 35 or 60??
Thanks in advance for any input!
Dave

[dirtdobber]

Dave,

What is the charging output of your current engine? The reason I ask is if you are going to use LED lights they typically have only small demand for current. Think about all an automobile alternator has to support: head lights, parking lights, turn signals, tail lights, windshield wipers, heater/AC blower motor, AC compressor clutch, engine cooling fans, trailer lights, radio system, power windows, all dash lights/instruments, throttle body motor, fuel pump, fuel injection system, rear window/mirror defrost system, etc. all that can run simultaneously. You may not need as much power as you think, unless you plan on having lots of lights, music, trolling motor, etc.

Tell us what your current set up is.

I guess your driving habits would matter. If you intend to do lots of nighttime idling an alternator would be beneficial.

[dave phelps]

Ok. Have 22hp predator engine with a 7 amp system. I know that's not gonna be enough but I wanna go with a mini altenator as I am tight for room as it's going right under the 780 clutch and the drive chain is also in there too. It's a 4 chain attex machine.
Thanks

[dirtdobber]

Yep. 7 amps isn't going to keep your battery charged very well with a bunch of lights running. So, I'm no electrician, but I would add up all the power demands (watts) for my current equipment (current lights if you're going to keep them, bilge pump, etc.) and also add in the power demands for the desired equipment (new lights, etc.). I wouldn't worry much about the electrical components that are not continuous duty such as the starter and winch. Ultimately, add up all the possible watts you will need at one time and convert it to amps (there are online calculators to do this - be sure to use DC). This will tell you the draw placed upon your battery and you want a charging system to keep up with the draw. Actually an alternator that exceeded the draw would be good.

[dave phelps]

Yep. 7 amps isn't going to keep your battery charged very well with a bunch of lights running. So, I'm no electrician, but I would add up all the power demands (watts) for my current equipment (current lights if you're going to keep them, bilge pump, etc.) and also add in the power demands for the desired equipment (new lights, etc.). I wouldn't worry much about the electrical components that are not continuous duty such as the starter and winch. Ultimately, add up all the possible watts you will need at one time and convert it to amps (there are online calculators to do this - be sure to use DC). This will tell you the draw placed upon your battery and you want a charging system to keep up with the draw. Actually an alternator that exceeded the draw would be good.

Ok thanks Dirtdobber I'll see what I come up with.

[Dozerlarry]

I'd go with the big one, probably not much difference in size and if you winch a lot you won't be sorry. It's only going to put out what's needed to keep everything charged up anyway.

[Dixon]

I know this probably doesn't help but I just bought one of these for my mower it is only 14amps but very compact.

https://www.dbelectrical.com/products/permanent-magnet-alternator-kubota-tractor-and-utv-10935.html#replacement-list

[fmints]

[QUOTE=Dixon;213490]I know this probably doesn't help but I just bought one of these for my mower it is only 14amps but very compact.
[url]https://www.dbelectrical.com/products/permanent


CAN YOU SUPPLY A PIC WITH THIS MOUNTED? I NEVER SEEN ONE BEFORE AND WOULD LOVE TO SEE ITS APPLICATION!!

[Dixon]

Yes tomorrow I will snap one it is on my Kubota diesel powered 721D grasshopper

[Canadian_Zuk]

I have a 35amp 10si alternator I put on my Max IV. It seems to be about perfect for my needs, I run a winch that get used a fair bit and have an LED light bar that stays on all the time at night. I've never needed more than what this provides.

[dave phelps]

I have a 35amp 10si alternator I put on my Max IV. It seems to be about perfect for my needs, I run a winch that get used a fair bit and have an LED light bar that stays on all the time at night. I've never needed more than what this provides.

Ok I'm thinking I'll prolly just go with the 60 just because I don't want to do this again if you know what I mean!!
Thanks for the info
Dave

[Dixon]

Here are some photos of the 14 amp alt. I put a link up for.

[ARGOJIM]

Here are some photos of the 14 amp alt. I put a link up for.

I had often thought of one of those dynamos myself.

[miller_time]

I would stick with an alternator over the dynamo. I have switched 2 dynamos for alternator's. The dynamo usually uses an external regulator. its built into the alternator so its really not alot bigger but has alot more output. Not sure if you go in the water much but with a 60amp alternator your could continuously run a trolling motor without draining your battery. As long as the engine is running of course.

[ARGOJIM]

I would stick with an alternator over the dynamo. I have switched 2 dynamos for alternator's. The dynamo usually uses an external regulator. its built into the alternator so its really not alot bigger but has alot more output. Not sure if you go in the water much but with a 60amp alternator your could continuously run a trolling motor without draining your battery. As long as the engine is running of course.

Agreed, a 30 or more amp Nippon denso alternator is a nice unit, some may need to be key(switch) operated but can be obtained cheap if you look around. The one wire version of this will cost a bit more.