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Old 12-21-2018, 12:12 PM   #1
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Default Battery Tender

Is anybody using a Battery Tender for your Chassis AGM battery? RV's can sit for a while, do you disconnect your battery in between trips? Trickle Charger? Battery Tender, drive around the block? Any thoughts are appreciated.
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Old 12-21-2018, 12:42 PM   #2
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Is anybody using a Battery Tender for your Chassis AGM battery? RV's can sit for a while, do you disconnect your battery in between trips? Trickle Charger? Battery Tender, drive around the block? Any thoughts are appreciated.
If you have even a small solar setup and park outside, the Trik-L-Start (or equivalent) is the best choice. Keeps house and chassis ready to go at all times. If indoors with power access, a trickle charger is fine--just make sure it is a good one.

Do NOT consider "drive around the block". You should never start a vehicle in storage unless you are able to bring it up to full operating temperature for long enough to get rid of the introduced moisture. With a diesel, that can mean a 20 minute drive at speed.
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Old 12-21-2018, 10:59 PM   #3
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I don't have an AGM but i keep a battery minder on mine 24/7. the only time it comes off is when i'm driving it. i don't know much about AGMs but if that is too much you might try plugging the battery tender into a timer and adjust the on time however you want.
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Old 12-22-2018, 02:40 AM   #4
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If you are contemplating a Battery Tender product, I'd recommend going to their site. They have some chargers designed to handle AGM batteries and some that can handle either AGM or Lithium (switchable). I'm not an expert in this area but if I was doing it I might also examine the size limitations via the downloadable manuals. One states for batteries "up to 60AH" for example.

I would think that these same issues would be of concern in other branded products.
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Old 12-22-2018, 04:42 PM   #5
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I'm not an expert in this area but if I was doing it I might also examine the size limitations via the downloadable manuals. One states for batteries "up to 60AH" for example.
I'm not an expert neither but I think this limitation only apply if you need to recharge the battery in a reasonable amount of time. For maintenance, even the smallest unit are ok.

Here's for example the NOCO G750 which is recommended for maintenance only for battery larger than 30Ah.

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Old 12-23-2018, 02:37 AM   #6
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Yoshimura: Point well taken. I hadn't thought of that. Thanks.
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Old 12-23-2018, 04:28 PM   #7
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Thanks all. Good thoughts. Reaffirmed my growing respect for Battery Tenders.

We have the solar setup, but it's too cold or hot to store the rig outdoors. I had skylights put in the roof above the solar panel, but it filters too much to take care of both house and chassis batteries.

And absolutely up to temp each time. We have guests for Christmas staying in the rig and when we go dump, we'll run up a long steep hill as part of the trip.

Thanks again. Merry Christmas!
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Old 12-28-2018, 02:06 PM   #8
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Default Battery Tenders are great for storage

I am a big believer in Battery Tenders (not trickle chargers). I have them on every battery that gets stored in Ohio for the winter like my lawn mower, motorcycle, classic cars, and my RV. The batteries will last twice as long, or longer if they are kept at a full charge. The battery tender will pay for itself very quickly. I have used them for years. Don't buy them at Harbour Freight... Buy a "Battery Tender" (Name brand)
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Old 12-28-2018, 02:09 PM   #9
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Default Battery Tender

thank you sir - that is becoming my opinion as well.
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Old 12-29-2018, 11:14 AM   #10
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I have a couple of the brand that g1g uses - BatteryMinder - in service for 12 years now. I don't use them on the RV's now only because my setups don't need them anymore but they are still great for maintaining other batteries that I have.
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