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Old 06-19-2011, 09:58 AM   #1
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Inverter low output

Bought a 99 Fleetwood Discovery last year. This year, replaced house and starter batteries and the shop said the inverter was not working properly. This was a truck repair shop so I looked for a shop that works on motor-homes - none in the area.

I checked the AC output from the inverter and it was only 100 volts. Can't operate even the AC lighting with the battery/inverter system. Everything works onshore power.

Any ideas as to what is causing the low output would be appreciated. Is there a way to adjust the output so I can increase the the output to 115 volts?

Thanks for any suggestions.
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Old 06-19-2011, 10:27 AM   #2
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i just replaced my inverter in my 00 Winnebago Adventurer. My inverter was a 125 watt. This was strictly used to power the Tube TV and maybe a VCR. I put a 37" LCD TV in and a Blu-ray surround system in. I needed to upgrade to a 600 watt Pure Sine Inverter just to run the new equipment.
The problem you will run into as I did is that the bigger the Inverter, the more you will be able to run with it, but the drawback is more battery storage will be needed and then you will need more ability to charge more batteries.
Once you start a motion of change to accomodate one thing, it sets a motion to change a lot of things at a big expense! I stuck with a small change.
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Old 06-19-2011, 10:30 AM   #3
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There is no way to increase the AC output from your standard inverter because there would be no reason to. The output AC voltage should be closer to 120 volts so it appears you have an internal problem with the inverter. A 100 volts AC output from the inverter would indicate a battery voltage of 10 volts DC and since these are new batteries that not likely, but it might be a good idea to check them just to be sure.
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Old 06-19-2011, 11:44 AM   #4
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If your inverter is a modified sine wave, and you did not us a true RMS meter, then the reading is not accurate.

Ed
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Old 06-19-2011, 01:40 PM   #5
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Quote:
Originally Posted by Ed-Sommers View Post
If your inverter is a modified sine wave, and you did not us a true RMS meter, then the reading is not accurate.

Ed
I used a digital voltmeter.
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