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Old 12-25-2014, 11:10 AM   #29
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You wouldn't need extra batteries as the extra alternator should be sized for the fan
and the fan would only operate when the engine is running
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Old 12-25-2014, 12:07 PM   #30
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oldguy: I am not an auto electric expert but I think
that you cannot dump more juice into the battery than the capacity of the batteries. I always thought that the alternator feeds your battery bank and all the draw was from the batteries. Also keep in mind that the system uses 24 volts!
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Old 12-25-2014, 01:00 PM   #31
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Quote:
Originally Posted by moisheh View Post
oldguy: I am not an auto electric expert but I think
that you cannot dump more juice into the battery than the capacity of the batteries. I always thought that the alternator feeds your battery bank and all the draw was from the batteries. Also keep in mind that the system uses 24 volts!

I think oldguy70 has it right. The extra alternator connects directly to the fan controller...NOT anything else on the coach. It's completely self sufficient.....that way it could be 48 volts even and not matter since it only feeds itself.
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Old 12-25-2014, 01:17 PM   #32
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Interesting. So where would we install that extra alternator on a MH. Is it compact? Pasdad: Do you have a link to the installations info. I live not far from the Motor Coach factory and parts dept. maybe I could go to the parts dept. and look at that beast.
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Old 12-26-2014, 11:10 AM   #33
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The extra alternator would be connected to your engine battery and it won't
over charge. It would be the same as putting in a higher amperage alternator,
which would be a possibility. Pasdad1 talked about higher voltage motors, but
alternators need a battery source but for 24 volts 2 small 12 volt batteries
would be fine as the fan would be running off the alternator. As for where
to mount an other alternator you would have to see where it could fit and
you may have to make up your own bracket. It might be easier to get a
higher capacity alternator
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Old 12-27-2014, 10:21 PM   #34
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I really don't understand all this stuff about battery capacity and fan horse-power but I know I mistakenly bought a 2006 Monaco diplomat in which the previous owner had converted to an electric fan system. It had four fans installed in a frame that required major modifications to the shroud to fit it in. It had a manual switch in the drivers compartment and it worked great on flat ground. But I live in the west and we have hills. Even a short climb caused overheating and bigger ones resulted in all kinds of warnings and in one case the engine finally cut out.

We spent many days (even weeks) residing in various repair shops where we replaced thermostats, radiators until we finally found our way to Source Engineering who rebuilt the shrouding and installed a new fan in the MH. Ever since it has worked great. I'm sure we saved a little gas using the electric fan but I would never go back to it. That 400 HP engine works fantastically. You paid a huge up charge to buy a DP for all kinds of good reasons. Why would you want to cripple it just to reduce mileage a little bit. Just buy a front gas engined van chassis class C and be done with it.
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Old 12-28-2014, 06:56 AM   #35
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Quote:
Originally Posted by Gary8346 View Post
I really don't understand all this stuff about battery capacity and fan horse-power but I know I mistakenly bought a 2006 Monaco diplomat in which the previous owner had converted to an electric fan system. It had four fans installed in a frame that required major modifications to the shroud to fit it in. It had a manual switch in the drivers compartment and it worked great on flat ground. But I live in the west and we have hills. Even a short climb caused overheating and bigger ones resulted in all kinds of warnings and in one case the engine finally cut out.

We spent many days (even weeks) residing in various repair shops where we replaced thermostats, radiators until we finally found our way to Source Engineering who rebuilt the shrouding and installed a new fan in the MH. Ever since it has worked great. I'm sure we saved a little gas using the electric fan but I would never go back to it. That 400 HP engine works fantastically. You paid a huge up charge to buy a DP for all kinds of good reasons. Why would you want to cripple it just to reduce mileage a little bit. Just buy a front gas engined van chassis class C and be done with it.
This is great to finally get a "real time" story from someone that had the electric setup.......Thanks.
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