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Old 04-23-2019, 05:02 AM   #1
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Residential Frig? How many batteries, amp hrs do you have?

I'm trying to determine how many batteries/amp hrs are needed to serve your electrical needs while boondocking with a residential frig. It's time for new batteries and I'm trying to determine what I need. While boondocking, we typically consume 20-240 amp hrs. In 24 hrs.
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Old 04-23-2019, 06:10 AM   #2
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To clarify my post, I'm asking those of you with residential frogs to tell me how many house batteries you have and what your total amp hr rating is. Sorry for the confusion.
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Old 04-23-2019, 06:12 AM   #3
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Oo oops. Not frogs....frig's!!! I'm not having a good day ☹️
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Old 04-23-2019, 06:18 AM   #4
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I have upgraded to 800 amp hours of battery fed by 900 watts of solar. I have Outback nano carbon batteries that do not require a full charge every time which allows the solar to be the sole power input. If no AC is needed I can live off the batteries. I have a Samsung RF18 installed.
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Old 04-23-2019, 07:51 AM   #5
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Most residential fridge installations run fine on 4-6 200 amp/hr 6V golf cart batteries. The assumption is that you run your generator in the AM for two hours and in the afternoon/evening for 2 hours. Solar is a great help and 400-600 watts should do it.
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Old 04-23-2019, 08:19 AM   #6
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I have 700w solar and four Battleborn GC2 (400ah total), which would be pleanty if we didnt also use a bunch of other energy hogs.
I wish I had ~1000w solar and six Battle born batteries because with our other energy uses, I use the genny too much.
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Old 04-23-2019, 09:29 AM   #7
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Most residential fridge installations run fine on 4-6 200 amp/hr 6V golf cart batteries. The assumption is that you run your generator in the AM for two hours and in the afternoon/evening for 2 hours. Solar is a great help and 400-600 watts should do it.
I have 6 6V golf cart batteries and I usually run genny for 1.5 hrs is morning and then evening while getting dinner ready etc. We are not big energy users either, rarely run tv or other stuff and never a problem. Had solar on previous coach but I like to be in shady spots when sun is hot so they are not doing me any good then.
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Old 04-23-2019, 11:13 AM   #8
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Quote:
Originally Posted by luvlabs View Post
Most residential fridge installations run fine on 4-6 200 amp/hr 6V golf cart batteries. The assumption is that you run your generator in the AM for two hours and in the afternoon/evening for 2 hours. Solar is a great help and 400-600 watts should do it.
My MH has 4, 6V golf batteries at 200AH each. $ is the max I can out in my unit. Luvlbas - I am real curious as to where you put all those batteries at in a Sprinter chassis. 2 batteries go under the entry steps, but where did you put the other two at??
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Old 04-23-2019, 11:33 AM   #9
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Six CG2 6v batteries.

210ahx3pair=6302=320usable

It's adequate, just so when needing to run furnace blower in cold weather.

But looking to add more capacity for convenience. Maybe six of the Lifeline tall GC2 footprint 300ah AGM. But heavy and $2500. Woukd live to have five or six 100ah lithium, but hard to cost justify even with a claimed 3000+ cycle life.
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Old 04-23-2019, 02:45 PM   #10
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I would say a residential refrigerator needs 2 more batteries...will run it 24 hours which is longer than most house battery will last, even in your Knight. My generator run time actually decreased when I went residential in my Dynasty BUT I added a 100A additional charger. On average a residential uses 1.2-1.3 KW/day...15 cents.

On my “new” rig I replaced 4 L16 batteries (880AH) with 880AH of Interstate AGM batteries plus 900W of solar. Have only tested my boondocking ability and hopefully I will only need an hour of generator time when parked in the shade so I will not need AC.
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Old 04-23-2019, 04:29 PM   #11
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We have a Samsung 18 residential 'fridge. We love it!! We have (4) Trojen T105 225 amp/hr batteries. They are not new and do not hold a charge as long as new batteries would but we have no problem. I have to run our generator a little but it's no big deal. 90% of the time we have at least a 110v outlet close enough to plug in to. This runs the 'fridge and recharges the batteries. When no 110v is available we just run the generator when necessary. Not more than a couple hours a day max.
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Old 04-23-2019, 04:40 PM   #12
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I think the variables involved would be wet cells, AGM or Li's, how much else you are using for other things than just the fridge, how much in solar panels, how much you are willing to run a gen to keep things topped off if need be.
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Old 04-23-2019, 06:26 PM   #13
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Three years ago, I went with six 6 volt 300 amp Lifelines for a total of 900 amps. 620 watts of solar and a 2 kw honda and 40 amp smart charger when the solar falls behind. I still need the 10kw genny for the induction cooktop.
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Old 04-23-2019, 09:04 PM   #14
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Crasher: where do you have the Lifelines stored? I'm thinking four may fit in your batt bay but what about the other two? How is your batt bay handling the weight? Are they on a slide out tray or are they on the bay floor?
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