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03-29-2009, 08:35 PM
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#1
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Rivet Master
2023 30' Globetrotter
Pleasanton
, California
Join Date: Feb 2009
Posts: 1,905
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definition of inverter? why no 120VAC when unplugged from city current?
Jason, the electrical klutz speaking once again...
Isn't the definition and "job" of an inverter to change battery DC power into 120VAC power (yea, with lots of conversions factors and ratios). Shouldn't one if not all of my 120VAC outlets in the AS have juice to them when I'm disconnected from city / house 120VAC? I figured that I'd at least be able to get an hour of TV / DVD out of the on-board battery and inverter, but when I pull the 120 plug, everything 120 is gone.
Is everyone else's trailer a 12VDC-only trainer when the umbilical is yanked or is it just me?
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03-29-2009, 08:53 PM
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#2
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Rivet Master
1979 23' Safari
1954 29' Liner
Orange
, California
Join Date: Feb 2005
Posts: 3,850
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Quote:
Originally Posted by atobols
Jason, the electrical klutz speaking once again...
Isn't the definition and "job" of an inverter to change battery DC power into 120VAC power (yea, with lots of conversions factors and ratios). Shouldn't one if not all of my 120VAC outlets in the AS have juice to them when I'm disconnected from city / house 120VAC? I figured that I'd at least be able to get an hour of TV / DVD out of the on-board battery and inverter, but when I pull the 120 plug, everything 120 is gone.
Is everyone else's trailer a 12VDC-only trainer when the umbilical is yanked or is it just me?
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Jason,
You got it, unless someone installed an inverter, only have 12V power when not plugged into a 120V outlet. Your trailer has a convertor which keeps the batteries charged when plugged in.
Bill
__________________
Bill Kerfoot, WBCCI/VAC/CAC/El Camino Real Unit #5223
Just my personal opinion
1973 Dodge W200 PowerWagon, 1977 Lincoln Continental, 2014 Dodge Durango
1979 23' Safari, and 1954 29' Double Door Liner Orange, CA
https://billbethsblog.blogspot.com/
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03-29-2009, 10:12 PM
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#3
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4 Rivet Member
1962 22' Flying Cloud
Bend
, Oregon
Join Date: Dec 2008
Posts: 370
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In order to do both, you need an INVERTER, which inverts 12VDC to 120V AC, and a CONVERTER which converts 120VAC to 12VDC. The size of the INVERTER you need depends on how many 120V appliances you wish to run, and how much 12V power (i.e. batteries) you have to work with.
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03-30-2009, 07:47 PM
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#4
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Rivet Master
2023 30' Globetrotter
Pleasanton
, California
Join Date: Feb 2009
Posts: 1,905
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my bad I guess. I thought the Univolt IS an inverter as well. I looked at it again and I see it says "power supply." I guess I misconstrued that as a 120VAC power supply...apparently not the case, though.
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03-30-2009, 07:57 PM
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#5
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Rivet Monster
1975 31' Sovereign
1980 31' Excella II
Sprung Leak
, North Carolina
Join Date: Jun 2003
Posts: 7,172
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Quote:
Originally Posted by atobols
Jason, the electrical klutz speaking once again...
Isn't the definition and "job" of an inverter to change battery DC power into 120VAC power (yea, with lots of conversions factors and ratios). Shouldn't one if not all of my 120VAC outlets in the AS have juice to them when I'm disconnected from city / house 120VAC? I figured that I'd at least be able to get an hour of TV / DVD out of the on-board battery and inverter, but when I pull the 120 plug, everything 120 is gone.
Is everyone else's trailer a 12VDC-only trainer when the umbilical is yanked or is it just me?
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Trailers come set up from the factory to provide 12 volt power to a few select items ie: furnace blower, fridge, water pump and some lights and special plugs (look like cigarette lighters). It comes with a CONVERTER to convert the 120v power to 12 volts. It DOES NOT come with an INVERTER which goes the other way (12 volt to 120volt) You can install an inverter, however it will not power a 120volt anything for very long on battery power only. The rest of the stuff runs on 120volt ONLY when you are plugged in to shore power.
Aaron
__________________
....so many Airstreams....so little time...
WBCCI #XXXX AIR #2495
Why are we in this basket...and where are we going
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03-30-2009, 08:17 PM
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#6
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Rivet Master
1986 31' Sovereign
Miami
, Florida
Join Date: Feb 2004
Posts: 3,137
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Atobols,
Try reading this: Inverters by phred
pretty good primer...
mike
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06-04-2009, 01:37 PM
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#7
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Islander
2005 28' International CCD
Deer Harbor
, ORCAS ISLAND WA
Join Date: Feb 2009
Posts: 981
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inverter intergration into coach's system
any experience in installing an inverter so as to intergrate it into the electric system of coach to allow ALL convience 110 v outlets to become live receptacles using only the 12DC power as supplied by batteries and recharged by solar application or generator or tow vehicle alternator???
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06-04-2009, 01:58 PM
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#8
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Rivet Master
1979 23' Safari
1954 29' Liner
Orange
, California
Join Date: Feb 2005
Posts: 3,850
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Quote:
Originally Posted by kingfisher24
any experience in installing an inverter so as to intergrate it into the electric system of coach to allow ALL convience 110 v outlets to become live receptacles using only the 12DC power as supplied by batteries and recharged by solar application or generator or tow vehicle alternator???
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Kingfisher24,
Colin Hyde has a method of doing what you want. As I remember, it takes some rewiring and one expensive switch. Email or phone the VAP with your question, as Colin does not check in here very often.
Bill
__________________
Bill Kerfoot, WBCCI/VAC/CAC/El Camino Real Unit #5223
Just my personal opinion
1973 Dodge W200 PowerWagon, 1977 Lincoln Continental, 2014 Dodge Durango
1979 23' Safari, and 1954 29' Double Door Liner Orange, CA
https://billbethsblog.blogspot.com/
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