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post #1 of (permalink) Old 10-23-2002, 08:01 PM
sheesley
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OT power inverter question 2000 watt continuous

I have a brand new coleman 2000 watt contiuous and 4000 watt surge inverter-hooked it up with 6 foot 02 guage wires and plugged a 1000 watt portable heater into it and it overloaded the system and shut off via the protective over-ride circuitry built into it. I then put jumper cables onto it thinking the lead wires were too wimpy and the same thing happened-how come this inverter which is rated at 4 times the surge capacity-will not power my portable heater-the battery is good and all connections seem to be more than adequate? Any help or suggestion on the install?
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post #2 of (permalink) Old 10-23-2002, 09:06 PM
 
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Re: OT power inverter question 2000 watt continuous

Try and run the heater with out the 6 foot cord. Keep in mind, you do not have a much power to do the job once it travels though all of that cord.
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post #3 of (permalink) Old 10-23-2002, 09:14 PM
 
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Re: OT power inverter question 2000 watt continuous

Been there, done that. The issue you're having is that you probably don't have enough available juice to FEED the inverter. Only two ways around it:
1) up the RPMS until the problem stops (think Hand-throttle).
2) go dual batteries in order to increase the amount of available reserve you have (this is a short term fix as it WILL diminish the batteries, just not as FAST).
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post #4 of (permalink) Old 10-24-2002, 06:06 AM
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Re: OT power inverter question 2000 watt continuous

The inverter will have input voltage listed on its ratings panel. Put a DVM on the input lugs and see what you have. It will probably be below the minimum. Then you know for sure that Bluesman is right.
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post #5 of (permalink) Old 10-24-2002, 07:35 AM
 
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Re: OT power inverter question 2000 watt continuous

You're correct Jim, but only for half the story. There's also the matter of CURRENT. He may not have enough amperage to push a big power supply. Voltage on a Jeep changes very little (optimum between a little under 12 up to 14) while current can change radically depending on alternator RPM's. [img]images/graemlins/cool.gif[/img]
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post #6 of (permalink) Old 10-24-2002, 10:15 AM
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Re: OT power inverter question 2000 watt continuous

If the electrical system can't supply sufficient CURRENT to the inverter, it will show up as a drop in VOLTAGE at the inverter.

Flip side of the coin: If there is rated input VOLTAGE or more, at the inverter input lugs, it is getting as much CURRENT as it wants. If there is still a problem, it's inside the inverter.

The key to evaluating the situation is to check the voltage available AT THE INVERTER while the inverter is under load and about to fail. Knowing the voltage when the inverter isn't being used will, as you suggest, tell you nothing. You would read battery voltage, even if the inverter were connected with the smallest wire you could find.

As the current flow into the inverter increases, the voltage at the input lugs will fall. That is inevitible. If it fall too far it means that the inverter isn't getting enough current.
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