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Old 04-05-2015, 03:43 PM   #15
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FWIW, I've let my run overnite w/o the generator and everything was still very cold the next morning. But I was not staying in the RV so there were no other significant draws on the house batteries. And it is usually after ten hours of driving so the batteries are starting out fully charged.
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Old 04-05-2015, 03:56 PM   #16
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So, it sounds like if we fire the gen in the evening, do a little microwave, or convection cooking, and watch a little TV, while the batteries are being topped off, that I should have no problem making it through the night, and recharging after 8:00 the next morning.
Thanks for the replies. It was a great help.......Tom
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Old 04-05-2015, 04:38 PM   #17
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Welcome to the Airforums.

With the new 100W solar panel and minimal use of the inverter, I'd think there would be no problem keeping the frig going over nite. Minimum opening of course would help. The frig is a 12VDC/120VAC unit. However it inverts the 120VAC to 12VDC so it is more efficient to run on straight DC rather than invert twice.
Agree with this, you won't have any problems with just the refrigerator and some lights. Not sure if you turn on the TV for a couple hours.

Some people at others suggestion, have opened the sponge door, removed the tray and reached in and unplugged the refrigerator from the outlet.

It also may depend on the state of your house batteries the day you bring your van home and how you monitor it from there.
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Old 04-06-2015, 10:33 AM   #18
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Just finishing a long shakedown trip with our new 2015IS. Our only problem was with the NK as I posted last week. After talking to tech support and our experience we learned all about it. We had been given erroneous information while shopping and during our initial walk through-separate dealers. Had been told unit works on propane as well as totally switches automatically from shore power to driving. The unit is not propane. The inverter must be on all the time. Our unit went from not being usable to working well just by learning this being confirmed-it is not automatic unless inverter is on(contrary to what we were told). We know now that our unit was off while driving, heated way up as our outside temps got higher(80s) and could not cool down fully on AC,etc. The door seals are too loose and either needs door adjust or seal replacement. We spent a week off of shore power. We got lots of help from the solar panels and went as long as 14 hours with no problem. We did recharge with engine most of the time and gen on occasion, but time depends on charge and outside temps. Usual good sense use and even keeping a frozen water bottle in freezer to transfer to fridge if hot can help.
We are really excited that things are working so well that we are only going to address the seal issue.
To the OP- we will be in our AS at Oshkosh in July, but have rented a house with friends so no camping this time.
Good luck. These forums have been great!
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Old 04-06-2015, 10:36 AM   #19
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The inverter must be on all the time. Our unit went from not being usable to working well just by learning this being confirmed-it is not automatic unless inverter is on (contrary to what we were told).
It should work in 12vDC mode with the inverter turned off. Mine does. The only reason why it wouldn't is if you have a disconnect on the 12vDC side such as a blown fuse.
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Old 04-06-2015, 10:48 AM   #20
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One other thing from our experience. If batteries get below 10v the NK will be disconnected to conserve power. Happened one time while on DC. We do get warnings by solar control unit flashing low when voltage critical and have been able to avoid the shutdown without problems.
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Old 04-06-2015, 10:54 AM   #21
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One other thing from our experience. If batteries get below 10v the NK will be disconnected to conserve power. Happened one time while on DC. We do get warnings by solar control unit flashing low when voltage critical and have been able to avoid the shutdown without problems.
But if batteries get below 10v, the inverter won't work either. 10v is below 0% charge on a 12v battery.
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Old 04-06-2015, 10:54 AM   #22
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Something isn't right as suggested above. If you keep your inverter turned on all the time, you will be hard pressed to keep your batteries charged when not hooked up to shore power. Check your fuses.

You may want to try a quick and easy test by unplugging your refrigerator as I posted above to see if it works on 12v, you can always plug it back in. Try it with the inverter turned off.
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Old 04-06-2015, 11:53 AM   #23
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We have not seemed to have problems with charging from the alternator while underway with inverter on or if recharging when stationary and not on shore power if we do so every 8-12 hours.
I am underway ( wife driving) so don't know about unplugging when we get home. Really don't understand where the plug is or what the foam door is to remove.
Thanks
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Old 04-06-2015, 12:26 PM   #24
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Underneath the sink is a tilt out (I call it) sponge drawer. Tilt it out, loosen 2 screws that hold the plastic tray in place, remove the tray, reach in and unplug (normal plug into regular outlet) the refrigerator. Your refrigerator should still work on 12v only.

Wait until you get home and off the road.
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Old 04-06-2015, 12:35 PM   #25
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Ours is opposite the sink. I have one candidate that maybe the one, but I thought was for TV located above. Project for later.
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Old 04-06-2015, 12:52 PM   #26
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When you posted above you said 2015IS. I thought you had an Interstate but you have a Grand Tour. Not sure where the plug is on that.

Just for clarification:

Do the 2015 Grand Tour's say Interstate Grand Tour? Or are they either an Interstate or a Grand Tour?

OK, just went on Airstream website and it is in fact:

2015 Interstate Grand Tour EXT

FYI...you may be better off posting in the future as a Grand Tour so you don't confuse dummies like me
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Old 04-06-2015, 02:13 PM   #27
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Since it's a Grand Tour, doesn't it have a separate freezer section type refrigerator? If so, maybe it doesn't run on 12 volts at all. I doubt it but anything it's possible.
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Old 04-06-2015, 02:39 PM   #28
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Since it's a Grand Tour, doesn't it have a separate freezer section type refrigerator? If so, maybe it doesn't run on 12 volts at all. I doubt it but anything it's possible.
Interesting observation: I had thought the fridge in the Grand Tour was a 2-door fridge-freezer. But the 2015 Parts Book has different part numbers for the fridge and freezer, which sort of infers they are 2 individual units.
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