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Old 04-22-2022, 10:34 AM   #1
Join Date: Dec 2015
Location: KK6YAU
Posts: 97
Electrical storage question

Thought I would poll the experts on this best practices type question.

I have an indoor storage option I am looking at for my Kountry Star. It will have a dedicated 120 volt 20amp circuit. My question is in order to maintain the batteries, should I use adapters with my 50 amp cord to get down to the 120v plugin to keep the converter/charger live, or should I use separate trickle chargers on the house and chassis batteries and bypass the coach electrical system entirely. If using the house system, I would not be running ac, and such high load devices, more interested in keeping the basic electrical systems (batteries) live and healthy while stored.

Thanks in advance for your help!

2020 Newmar Kountry Star
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Old 04-22-2022, 10:42 AM   #2
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Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,745
Minimize all power draws in the coach. So in the case of a power failure, the batteries will have the best chance of not being depleted before power is restored. Turn off the inverter. Turn off the 12v switch by the entry door, or better, the house battery disconnect switch (if it doesn't disable battery charging).

Reduce the shore power setting on the charger to keep it from pulling more power than the shore circuit can provide.

A power loss monitor that will send you a notification is a good thing to have. Waggle, Marcell, etc.

If the storage power is GFCI protected, it can nuisance trip. Avoid GFCI circuit if possible. If a problem, then consider separate battery maintainers.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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Old 04-22-2022, 11:19 AM   #3
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Not knowing if your inverter charges your battery, I would plug in using adapters. Turn off all breakers except for the inverter, as it may charge your batteries. Turn off your refrigerator at the refrigerator. Unplug as many items as you can. Leave the 12v disconnect on, 12v loads will be minimal. Adjust your power control panel to 20 amps input. Verify house and chassis battery voltages climb into charging voltage range 13v. If this is too much to do then shut everything down and get 2 battery tenders one for chassis and one for house batteries and plug those in.
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Old 04-22-2022, 11:22 AM   #4
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Join Date: May 2020
Location: Fort Lauderdale, Fl
Posts: 561
Have you experimented with turning it all off and not plugging in?

We stored our 2020 Kountry Star outside with no power connection. I went two months and and batteries were fine. No solar on the house batteries.

I know some coaches have a bigger parasitic draw and can't do that. I guess I was just lucky with ours.

We now have a Dutch Star and storing it outside the same way. However, the BIM was not working properly (isolating) so the small solar on the chassis battery was keeping the house batteries up - was kind of a nice problem to have. I am getting that fixed this month under warranty and will start experimenting again with storing without charging. I do have power at my new storage location but if I do not need it I will not plug in. I would sleep better if it is not plugged in.
2022 Dutch Star 4369 FL Towing 2022 GMC Sierra 1500
Chris & Lee, Finnegan & Kirby (Double Doodled)
2020 Kountry Star 3709 towing Equinox.
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Old 04-22-2022, 11:26 AM   #5
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We store ours during winter using an adapter 50amp to 20 amp plug. Keeps batteries charged properly without any issues.
Only issue is making sure to not turn disconnects off as they will not charge on our 2002 MADP in this condition.
2002 Newmar Mountain Aire 4095
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Old 04-22-2022, 11:41 AM   #6
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Using a 20A GFCI outlet can be a problem with many RVs. Only / best way is to just try it, monitor and see how you do.
I'm a fan of batty maintainers and have used units for many years with very hood results. I mounted 2 of their units semi- permanently in our VTDP and have never hadvan issue w GFCI. I wired them to one extension cord in the bay closest to my storage location 20A receptacle.
Side benefit is my storage location agreed to not charge for power as long as I only used maintainer and wasn't running anything else.
Don & Marge
'13 Newmar Ventana 3433 - '14 CR-V TOAD
'03 Winnebago Adventurer 31Y - SOLD
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Old 04-22-2022, 12:59 PM   #7
"Formerly Diplomat Don"
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Location: Moorpark, Ca.
Posts: 20,781
If the storage facility power is a GFCI outlet, they can be problematic. With that said, my coach(es) have been parked in our side yard for 38 years. Our three DP's have been plugged into a 20 amp outlet for the last 18 years. I don't turn anything off, including the residential refer. We've never had an issue.

I would leave it plugged in and everything can attach some sort of power notification device that would let you know if there is an outage or someone unplugs you. If the facility has Wi-Fi the power notification would be easy.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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Old 04-22-2022, 01:05 PM   #8
Join Date: Dec 2015
Location: KK6YAU
Posts: 97

Thanks all for the advice. I will be monitoring remotely via my pepwave internet so will add the disconnect feature mentioned above.
2020 Newmar Kountry Star
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