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11-17-2011, 03:12 PM
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#1
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Montana Master
Join Date: Aug 2007
Location: Apache Junction
Posts: 1,732
M.O.C. #7487
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Inverter Voltage
I recently installed a Modified Sine Wave Inverter in our new rig, and for what ever reason I got curious and checked the voltage coming out of it. Well to my surprise it was only 103.8 volts. According to the manufacturer it is within specs, Hum. I had an inverter in our other rig but never checked the voltage. So now I guess I have you thinking, so go check you voltage and see what you come up with. In the trouble shooting guide it says to us a true RMS averaging meter, whatever that is to get the true voltage. Does anyone know the reason it is so low using a standard voltmeter. Rich
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11-17-2011, 04:19 PM
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#2
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Montana Master
Join Date: May 2003
Location: New Bern
Posts: 4,294
M.O.C. #311
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Quote:
quote:Originally posted by H. John Kohl
Quote:
quote:Originally posted by PapaBeav
I recently installed a Modified Sine Wave Inverter in our new rig, and for what ever reason I got curious and checked the voltage coming out of it. Well to my surprise it was only 103.8 volts. According to the manufacturer it is within specs, Hum. I had an inverter in our other rig but never checked the voltage. So now I guess I have you thinking, so go check you voltage and see what you come up with. In the trouble shooting guide it says to us a true RMS averaging meter, whatever that is to get the true voltage. Does anyone know the reason it is so low using a standard voltmeter. Rich
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This article should answer the question about low voltage and RMS meter. Taken from the article is this image showing a pure sign wave and modified sign wave supper imposed.
Since the Modified is more of a square wave it's peak is lower but the Root Means Squared (RMS) is calculated to almost as high as a pure sign wave.
Thanks for forcing me to do some digging.
This article address the benefits of a pure sign wave inverter.
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11-17-2011, 04:54 PM
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#3
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Montana Master
Join Date: Aug 2007
Location: Apache Junction
Posts: 1,732
M.O.C. #7487
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Thanks John, the article really helped in understanding the differences, so now I know. I wonder how it is on the new HDTV electronics.
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11-18-2011, 03:48 AM
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#4
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Montana Master
Join Date: Dec 2009
Location: Sebring
Posts: 3,662
M.O.C. #9969
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Rich, you may want to check with the Mfr of some on your new electronic items, some do not like the modified sine wave and require a true sine wave to function propertly. Things such as a blender, small drill, etc will work with the modified sine, but not the more sensitive electronic items. That's generally why a true sine wave inverter runs a little more in cost.
__________________
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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11-18-2011, 04:09 AM
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#5
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Montana Master
Join Date: Aug 2004
Location: Cedar Rapids
Posts: 4,876
M.O.C. #1944
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My Prosine 2.0 puts out 124 volts. 103 seems to me to be a little low though it is within specs.
Orv
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11-18-2011, 04:35 AM
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#6
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Montana Master
Join Date: May 2003
Location: New Bern
Posts: 4,294
M.O.C. #311
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Quote:
quote:Originally posted by ols1932
My Prosine 2.0 puts out 124 volts. 103 seems to me to be a little low though it is within specs.
Orv
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Orv, I just searched your Prosine and it is a pure sign wave as stated in this add. - Xantrex power inverters provide you with reliable power safely and efficiently. PROsine 2.0 are pure sine wave inverters offering true sine wave output.
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11-18-2011, 07:26 AM
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#7
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Montana Master
Join Date: Aug 2004
Location: Cedar Rapids
Posts: 4,876
M.O.C. #1944
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Quote:
quote:Originally posted by H. John Kohl
Quote:
quote:Originally posted by ols1932
My Prosine 2.0 puts out 124 volts. 103 seems to me to be a little low though it is within specs.
Orv
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Orv, I just searched your Prosine and it is a pure sign wave as stated in this add.- Xantrex power inverters provide you with reliable power safely and efficiently. PROsine 2.0 are pure sine wave inverters offering true sine wave output.
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John, thanks. That's exactly why I purchased it in 2003. Has given us very reliable service.
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