If all your going to do is keep the batteries up an extension cord with said adapters will be fine.
Try to keep the cord heavy and as short as possible.
Altho you can run the air I would suggest not doing so.
Even if it does work I wouldnt recommend it.
The last man standing also has a sharpie
X2 of you are just keeping the battery charged you can do so with a small solar charger.
Sent from my SPH-L720 using Forest River Forums mobile app
2012 Cedar Creek Silverback 29RE
2011 GMC 2500HD Diesel
I take my battery out of the camper and put it on a battery minder over the winter it keeps it charged and maintains the health of the battery. You don't even have to remove the batteries you can just disconnect them and run an extension cord to the unit and keep it right in your battery compartment. I remove mine because my camper is 100 miles north of here.
I purchased my battery tender at batteries plus and the instructions said it would maintain as many as 5 batteries. connected in paralell . But in your case I believe they would have to be connected in series. That way they are the same as a 12 volt battery.
I've been using a battery tender Jr on my two 12v batteries for 6 years.
Last summer we got 4 good days dry camping (including some TV) out
of them so I believe they've been taken good care of by the battery tender
I have one on my truck which is now 10 years old and still on the original
factory battery. Just drove it to FL and back no problems.
Also one on my motorcycle....
They are great for any battery that is seasonal use like RV, boat, motorcycle etc.
__________________ Peace! Dan & Rita D
2004 5.3L Silverado 1500 ext. cab 2WD
1999 Suzuki Intruder Motorcycle
Blue Ox WD hitch, AirLift load levelers
Camping days 2010-53, 2011-47, 2012-41,
2013-41, 2014-31, 2015-40, 2016-38
Can you charge your batteries off regular home power? I don't have an rv plug at home.
Do you have a 'spot' at your house that you will be parking your camper all of the time when not in use. Look into running a 30A line (pedestal) to your camper. Consult with an electrician and have them do it (or do it yourself if you know what exactly what needs to be done). Over the years you will be glad that you have the 30A available.
I've installed 3 30 amp receptacles at my place.
One by the house... for pre trip loading.
One where we park the camper in the yard for the summer.
And one in the shed where it sleeps in the winter......