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Running compressor on batteries

Correct me if I am wrong, can't I run a 120 v compressor on the batteries without shore power or generator? How long should 2 8d batteries be good for?

Larry
Larry Warren
1996  U320 36' SBID "Lola" sold 2020
Build #4970
Motorcade #18318

Re: Running compressor on batteries

Reply #1 –
It would depend on the compressor, and you would need an inverter that can provide the necessary power
1993 U225 Build #: 4285
500 Watts Solar
Honda CRV AWD
Former 1981 Foretravel Travco
Retired, Full Time Off Grid Snowbird

Re: Running compressor on batteries

Reply #2 –
If you have a modified sine wave inverter, some electric motors don't like it. You just need to try it.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Running compressor on batteries

Reply #3 –
I don't see why not although one of those little compressors will hit those batteries pretty hard. Similar to running a microwave, hair dryer or vacuum cleaner. With two 8Ds you probably have around 500 amp hours. Just need to ID your batteries and look up their capacity. Then divide that in half as it's good practice not to deplete them below 50%.
jor
93 225
95 300
97 270
99 320

Re: Running compressor on batteries

Reply #4 –
To be on the safe side, why not just run either gen or coach engine while using the 120 volt compressor (pushing amps in as they are used by the compressor).

I've been tempted to buy a high end 12 volt compressor, and tie to tow car battery while running tow car engine.  For now, I run the Cummins and tie into dry coach air to top up tires.
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: Running compressor on batteries

Reply #5 –
Thanks for the comments all, I will take the compressor down and try it. Hopefully it will run my impact quickly enough to break the starter bolt and not have to run the compressor long. If need be, I will bring the house batteries back to the house and put them on charger again to insure that they are charged after. I have purchased 120W worth of solar panels which I plan on temporarily installing on the roof to keep the house batteries charged while in storage. Just received an Amp-l-start charger to keep the start battery up to snuff. Wasn't planning on putting these on until the coach was running and the new tires were installed. Lots happening, just trying to get all the ducks in a row.

Larry
Larry Warren
1996  U320 36' SBID "Lola" sold 2020
Build #4970
Motorcade #18318

Re: Running compressor on batteries

Reply #6 –
Larry, you might start with a fell compressor, that will lessen the load on the front end!
Chris
1999 U 320 DGFE
Build Number 5523
Chris & Elka Lang
In the field, Lonoke AR

Re: Running compressor on batteries

Reply #7 –
I think you would need a volume tank to run an impact wrench, don't think pressure alone would run it.
Forest & Cindy Olivier
1987 log cabin
2011 Roadtrek C210P
no longer 1999 36' U320 build #5522
2013 Rzr 570 & 2018 Ranger XP1000
2006 Lexus GX470
2011 Tahoe LT 4x4
Previous 1998 45' 2 slide Newell, 1993 39' Newell

Re: Running compressor on batteries

Reply #8 –
I have s small pancake compressor which I will use. It runs the impact well, but can empty the  tank pretty quick.

Thanks guys,
Larry
Larry Warren
1996  U320 36' SBID "Lola" sold 2020
Build #4970
Motorcade #18318

Re: Running compressor on batteries

Reply #9 –
"break the starter bolt" ?????
"bring the house batteries back to the house and put them on charger again" ? ? ?
1993 U225 Build #: 4285
500 Watts Solar
Honda CRV AWD
Former 1981 Foretravel Travco
Retired, Full Time Off Grid Snowbird

Re: Running compressor on batteries

Reply #10 –
Quote from: Dakota Slim –
"break the starter bolt" ?????
"bring the house batteries back to the house and put them on charger again" ? ? ?
This is a spinoff of a thread about removing the starter on a M-11 and needing air pressure to break the back bolt loose.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Running compressor on batteries

Reply #11 –
Just an update, Ran my 120 v air compressor off of the batteries. Checked voltage before, 90%. Ran compressor <5 minutes down to 65%. No bueno. The batteries are back at the house being charged. Don't want to ruin brand new batteries.

Larry
Larry Warren
1996  U320 36' SBID "Lola" sold 2020
Build #4970
Motorcade #18318