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Old 02-14-2015, 04:27 PM   #1
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Shore Power or Not When MH Not Used For Long Periods of Time

When not using my MH for long periods of time I have been unsure whether or not to leave it connected to shore power. I realize batteries can be irreparably damaged if overcharged.

Knowing that different years/models of Forest River products have differing battery and charging systems I decided to pose my question directly to Forest River.

Following is my question to them followed by their next day response.

I know it is possible to damage batteries by charging them too long. I do not see any evidence of a charging/trickle charging/conditioning system on my Georgetown. When camping for a couple of weeks with full hookups and when parked at home, is it OK to leave the MH connected to 50 AMP shore power if I turn off the Master Battery Control switch? All 110 volt and 12 volt systems still work in this configuration, however I am not sure if the batteries still charge when the Master Battery Control switch is off.

If you turn the battery disconnect off your batteries will not charge. I suggest that you leave disconnect on to keep batteries charged. The convertor once batteries are charged goes into a storage mode and acts like a battery tender at that point. Basically if the batteries get so low it begins to charge again and then when they are fully charged stops charging till they drop in volts again. Please let me know if I can be of anymore help.

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Old 02-14-2015, 04:55 PM   #2
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First. Are you asking these questions or answering for someone?


With the master battery switch off it will not charge the batteries.

If you have the intelligent battery charger it know when the battery has just been on trickle charge. It usually has 4 stages. See details on sheet what each stage does.
Here is what mine looks like as well as the manual and a quick sheet.
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Old 02-14-2015, 05:10 PM   #3
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Iggy


Sorry for any confusion. I was unclear exactly how my MH was set up so I posed my question to FR. I created the thread to capture my question to and response from FR, in the event anyone else was previously as unsure as I was.
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2014 Georgetown XL 334QS (class A with 4 slides)
2013 Smart Car TOAD
Blue Ox Aventa LX tow bar, base plates, diode kit
SMI Stay-IN-Play Duo auxiliary braking system
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Old 02-14-2015, 06:06 PM   #4
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If you bought your coach new you got a package of booklets from the suppliers of various devices in your coach. One should be a user manual for your charger and it details the features. Mine does not have a true "trickle" charge rate so I don't leave it on for extended storage. I do plug into shore power now and then to keep the batteries topped off. If you look in the power compartment the charger will have a sticker with a lot of info (make, model, etc) that may answer your question. Or write down the make/model numbers and google the product.
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Old 02-14-2015, 07:15 PM   #5
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Turns put my Progressive Dynamics unit is model PD9270
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2014 Georgetown XL 334QS (class A with 4 slides)
2013 Smart Car TOAD
Blue Ox Aventa LX tow bar, base plates, diode kit
SMI Stay-IN-Play Duo auxiliary braking system
25' Off shore blue water fishing boat
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Old 02-14-2015, 07:59 PM   #6
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That one does an excellent job of taking care of the batteries and can leave it on all the time. Look it up on the Internet.


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Old 02-15-2015, 12:12 PM   #7
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Billr: It sure looks that way. The main reason I contacted FR about shore power attachment was that when I bought the MH my dealer said it should not be left connected to shore power for long periods of time. No only that, Kevin Stratton with Forest River told me the same thing last year. I am now working with a different person at FR.
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2014 Georgetown XL 334QS (class A with 4 slides)
2013 Smart Car TOAD
Blue Ox Aventa LX tow bar, base plates, diode kit
SMI Stay-IN-Play Duo auxiliary braking system
25' Off shore blue water fishing boat
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Old 02-15-2015, 12:48 PM   #8
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Quote:
Originally Posted by CA Fisherman View Post
Billr: It sure looks that way. The main reason I contacted FR about shore power attachment was that when I bought the MH my dealer said it should not be left connected to shore power for long periods of time. No only that, Kevin Stratton with Forest River told me the same thing last year. I am now working with a different person at FR.
Kevin Stratton wasn't entirely wrong - depending on what your definition of "long periods of time" is. If we are talking several months without use, then it's generally advisable to the the battery disconnect. Our coach never goes more than about 6-8 weeks without use, so we keep the coach plugged w/ some items remaining in the fridge and also to keep the coach climate controlled until our next trip.
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Old 02-15-2015, 02:25 PM   #9
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All modern multistage chargers should go into maintain mode when the battery is close to fully charged... older chargers won't. Obviously, the latter should be disconnected.
My personal view is that bad things can happen outside of design parameters and battery chargers should never be left on "permanently". My advice is to disconnect NOT the charging switch...but the negative post of the batteries since there are direct connected parasitic loads like the propane sniffer that do not get turned off with the switch.
A fully charged battery in storage (i.e disconnected) will only lose about 10% of charge per month....less below 70 degrees...more above. Fully charging a battery overnight once every couple of months is a better way to take care of it.
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Old 02-16-2015, 01:31 AM   #10
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At my utility, I work substation maintenance ie batteries, breakers, transformers etc.....our batteries banks outside of some test are never disconnected from power....the charger. As with the chart that Iggy provided, they are either at a trickle charge or boost usually in a bank of 60, 3 cell deep cycle batteries providing constant 135 colts. As with anything...there are bad apples but for the most part with the batteries being kept at 70 degrees and maintained by the charger they are rated to last 15 to 20 years not that you will get this out of your coach batteries but I am simply saying with a smart charger leaving them plugged in is not going to shorten their life by any significant amount.

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