240v in my van with 12v battery and alternator running


Old 06-07-17, 08:43 PM
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240v in my van with 12v battery and alternator running

I am running a 7500 watt generator to run a air compressor and tire changer in my van. Tire changer says 1100 volts on the back of it. The air compressor is 240 with 17.5 amps. The generator is gas engine and just extreamly loud and trying to avoid a second engine. And just be able to run it all off my van. I have a 2015 Ford transit 150. What power converter wattage do I need? Can I get 240 to run my air compressor? Can I run maybe a 6000 watt and a 3000 watt conver at the same time. With battery running on alternator?

Last edited by Mcessna; 06-07-17 at 08:59 PM.
Old 06-07-17, 10:35 PM
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Welcome to the forums.

A 6000w inverter would require at least 500 DC amps to run. Your battery and alternator would last for a minute..... and that's if that inverter had enough reserve to even start the compressor motor.

For your application.... the generator is the best way to power that equipment.
Old 06-08-17, 07:17 AM
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what if i added a second battery and alternator on the van. i seen kits to do so.
Old 06-08-17, 01:13 PM
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Any reasonably sized second battery would last the same length of time.

Last edited by ray2047; 06-08-17 at 01:58 PM.
Old 06-08-17, 01:17 PM
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The tire changer calls for 1100 VOLTs? I think something is seriously wrong.
Old 06-08-17, 01:46 PM
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I think the biggest alternator you can get on that Ford engine is a 220 amp and you have to get the idle parameters reprogrammed by someone who can access the ECU computer. That only gives you a little less than half the power you want. I see the only options are to use a smaller compressor or use a separate gasoline powered generator. I suppose a gasoline powered compressor might be a reasonable option too. There are also some decent 12 volt air compressors that you could wire into the vehicle electrical system directly. The output of course is less than your 240V unit, but might be enough for what you need, especially if you just add a bigger accumulator tank.

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