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Old 12-18-2011, 12:02 PM   #11
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Re: Running AC without a generator

Geesh Lorna, I said I'm going to do it, not that I had done it, not that it's that big a deal. I'll have the inverter system anyway, I'll just plug in an AC and see if it works. Pretty standard stuff: battery bank, inverter, and cabling to charge the house bank from the engine alternator. (I've installed the battery bank and cables already, just need a sine wave inverter.$$$) I've got a 160 amp alternator on the bus, so at road speed it shouldn't be a problem. If I was in stop and go traffic I'd turn the AC off.

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Old 12-18-2011, 01:34 PM   #12
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Re: Running AC without a generator

anything can be done if you want to spend the money, engine driven generator head would be better way to go cheapest, but you have to wonder how much power it would take to run it off the engine? aswell would much drag a extra alternator that is working hard? I just run the generator with the a/c running works good.

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Old 12-18-2011, 02:03 PM   #13
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Re: Running AC without a generator

My point is that I'm going to have a battery bank powering an inverter that can use the alternator for charging anyway. Might as well plug an AC in and see if it works. It's no extra expense, outside of a beefier sine wave inverter.
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Old 12-18-2011, 02:44 PM   #14
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Re: Running AC without a generator

Quote:
Originally Posted by bus-bro
My point is that I'm going to have a battery bank powering an inverter that can use the alternator for charging anyway. Might as well plug an AC in and see if it works. It's no extra expense, outside of a beefier sine wave inverter.
Long as you're most of the way already, what the hey, sounds like a good plan ...
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Old 12-18-2011, 04:15 PM   #15
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Re: Running AC without a generator

Most skoolies will have 90-100 amp alternators. Generally, the newer the bus, the bigger the alternator. Any bus with road A/C will have a bigger one, any bus with DUAL road A/C will have a REALLY big one (mine, with dual A/C, is 175A). Any truck that has to run big loads (liftgates, winches, a DPW truck or trash truck with bunch of strobe lights) while idling will also have a big alternator (and often, a third battery). Most of the time, they are factory options and will bolt right up to a skoolie engine & wiring harness. (Standardization is a wonderful thing.)

Note: DO upsize the wiring if you do this! I would go for, MINIMUM, a dedicated 2-gauge wire with fusible link from the alternator to the inverter, and would prefer a 1/0 gauge or better. I would figure the A/C load (remember the massive startup draw), add 50%, and wire for that.
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Old 12-19-2011, 12:32 PM   #16
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Re: Running AC without a generator

Quote:
Originally Posted by chev49
You can check on the bus conversions magazine forum. There are a couple of daily posters there that would probably diagram it all out for you.
Is this forum within Skoolie.net or is it a separate page? I could not find it here...
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