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Old 01-31-2019, 11:18 AM   #1
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Second (ie:Dual) Alternators?

Hi All,


I was thinking that a second alternator would be a great option for house power as I wanted to use Li-Ion or large LifePO4 24/48volt modules.


Is there room for another belt driven one? Are there alternators that bolt on the PTO port of the Allison?


Just a thought...
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Old 01-31-2019, 11:36 AM   #2
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on a FE bus like yours I'd be wondering where to mount one, but I'm sure there's a way,
Most alternators don't do much at idle speeds so look real hard at what they put out and at what speeds.
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Old 01-31-2019, 12:12 PM   #3
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What engine does your bus have?

I have seen a number of kits for the Cummins 5.9. Haven't found much for the 8.3 or the DT-466.
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Old 02-08-2019, 08:54 PM   #4
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Dual Alternators

Ive also got a DT466E powered FE bus. I am going to mount a second alternator to power my house batteries, I just cant get a 320 amp alternator to mount on the side of the engine in front of the Turbo.

Im thinking of 2 28SI Delco alternators. The first one will be the stock J180 mounts in the stock location to help the engine side and the second one will be using the stock AC compressor mount on top of the head and run it with the stock serpentine pulley that goes on top of the fan drive pulley. You can use a Delco 28SI with tab mounts. Ill have to make a mount but that is a perfect place to put it.

So it will be 200 amps of dedicated power just for the house batteries.
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Old 02-09-2019, 11:02 AM   #5
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Quote:
Originally Posted by FamilyCircus View Post
Ive also got a DT466E powered FE bus. I am going to mount a second alternator to power my house batteries, I just cant get a 320 amp alternator to mount on the side of the engine in front of the Turbo.

Im thinking of 2 28SI Delco alternators. The first one will be the stock J180 mounts in the stock location to help the engine side and the second one will be using the stock AC compressor mount on top of the head and run it with the stock serpentine pulley that goes on top of the fan drive pulley. You can use a Delco 28SI with tab mounts. Ill have to make a mount but that is a perfect place to put it.

So it will be 200 amps of dedicated power just for the house batteries.
That's pretty stout!

What sort of house battery bank are you running?
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Old 02-09-2019, 05:11 PM   #6
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Quote:
Originally Posted by PeteinSF View Post
Hi All,


I was thinking that a second alternator would be a great option for house power as I wanted to use Li-Ion or large LifePO4 24/48volt modules.


Is there room for another belt driven one? Are there alternators that bolt on the PTO port of the Allison?


Just a thought...
No? No alternators made to bolt to the PTO of the Allison if yours even has that option.
If it does have that option? Then you would need to get creative and build your own under the bus but it only charge while the tranny is turning/moving. A PTO is Very rare for a bus. A many of farm implements including generators are built to run off of PTO but none would fit under a bus and if it did? The PTO driveshaft angle to the genny could/would kill any usable storage space on that side.
Hope your a driveshaft engineer or can pay for it if your tranny has the capability.
Most PTO have a lever to lock them in or a switch to turn them on and off?
Do you have either?
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Old 02-11-2019, 03:30 PM   #7
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Originally Posted by PNW_Steve View Post
That's pretty stout!

What sort of house battery bank are you running?
Ill be running 1350 Ah battery bank. 9 of the GC12 batteries each has 150Ah, these are flooded batteries.

1950 Watts of Solar
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Old 02-11-2019, 04:51 PM   #8
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Ill be running 1350 Ah battery bank. 9 of the GC12 batteries each has 150Ah, these are flooded batteries.

1950 Watts of Solar
So you’re going to run 9 12 volt batteries wired all in parallel? That should prove interesting...post a diagram of how you plan to wire them up.
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Old 02-11-2019, 06:44 PM   #9
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Yes,

Please let us know how that works out for you.
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