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Old 01-11-2015, 08:08 PM   #15
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Naples, FL , Hood River, OR
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'Some might argue they also distribute AC power to any AC circuits on the trailer (e.g. air conditioner, microwave, power outlets), but that happens in a separate fuse box that also feeds AC power to the converter...for conversion to DC.'

Sorry, but this statement is totally false and misleading. ANY power converter/charger found in modern RVs, as we are discussing in this thread, have 2 functions and 2 functions ONLY!
provide DC power for the RVs many DC requirements, such as operating all of the control or PC boards located in the appliances and other 12VDC loads like lights, furnace, fans, etc.
provide for '12VDC' battery charging, either as a constant voltage from a Parallax or other 'dumb' converter, or automatic 3-stage battery charging from a 'smart' converter like a Progressive Dynamics.

A converter/charger HAS NO RELATIONSHIP WITH THE 120VAC SIDE OF THE RV other than to be connected to a single circuit breaker that provides the converter with the 120VAC it needs to power DC loads and for battery charging.

A converter draws 120VAC from the 120VAC circuit breaker box while on grid/generator power and powers the 12VDC fuse panel and charges the battery.............THAT"S IT!

Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
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Old 01-11-2015, 08:23 PM   #16
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Battery Charging while Stored

Lew, I'm pretty sure you and I just said the same thing (e.g. The converter does not distribute AC power, even if some may think it does.) Thanks for that vigorous reinforcement, though.

I've been paying attention, though I'll grant I should have substituted "two" for "a few."

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Old 01-18-2018, 08:22 AM   #17
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Originally Posted by GLovedahl View Post
I've looked through the discussions posted on here, but I'm still uncertain about keeping batteries charged on our Airstream while it's in winter storage. I live in North Texas, and the temps get down below freezing from time to time. The Flying Cloud is stored at a storage facility. I went over today and plugged the trailer into shore power, thinking that that would also charge up the batteries. It's been about a month since the trailer was towed, and then only briefly. Will plugging the trailer into the facility power from time to time charge the batteries? How long should I leave it plugged in? How often should I plug it in? The trailer is new, so the batteries should be in great shape....used only once so far. Sorry for such a newbie question....the world of RVing is totally new to me.
Glovedahl... before you get steered the wrong way by those trying to be helpful here without knowing the equipment you have installed... YOU should determine WHAT converter is installed in your 2015 Airstream.
In years prior to 2005 Airstream commonly installed the problematical converters made by Parallax. Since that time, Airstream has been installing 3-stage converters. (In my 2008 model, it's a WFCO that is plugged in CONTINUOUSLY for 3 years now and keeps my ordinary flooded-cell battery properly serviced without a single problem.)
I suspect you'll find you have a more modern converter that includes a multi-stage charger that can be left plugged in to shore power continuously, and all you'll need to do is check your battery electrolyte regularly. Even if wrong, the most damage that will occur is a short-lived, low-cost battery. (Mine has need a bit of water in one or two cells ....only ONE TIME in the last 3 years. WalMart sells deep-cycle batteries for less than $90 that will last several years under warranty.)
Hope this helps.
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Old 01-18-2018, 08:56 AM   #18
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I've decided that I'll install a battery disconnect, and then keep a NoCo Genius charger plugged in while the trailer is stored.

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