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Old 09-04-2017, 09:09 PM   #1
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Fridge question, combined with solar power question

Reading another thread got me thinking. The wife and I love the idea of a residential fridge but reading another thread it seems it would only run off shore power or generator. Is this the case?

Tying into my second question, can solar power be added and have enough energy to run a fridge......and/or the AC units? If so, how many watts or solar panels are needed for this. We are obviously newbies and one of many questions.

I apologize in advance if most of you are tired of answering the same questions. Did try to google to get answers first. Forgive me.

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Old 09-04-2017, 09:18 PM   #2
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If I remember correctly, a residential refrigerator takes about 150-200 amp hours per 24 hour period.

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Old 09-04-2017, 09:51 PM   #3
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Not sure but I believe that the Samsung uses about 2 amps once cold so that would be about 50 amp hours per day . AC , depends on the unit but most take 12-15 amps for starting up then drop off for running. With a large battery bank and a good inverter it could be done.
Ken and Shirley Westcott 2005 Southwind 32VS with 2005 Jeep Liberty .
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Old 09-04-2017, 09:53 PM   #4
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Residential refrigerators are far more efficient than years ago. Generally they run without issue off the battery bank requiring only a recharge each day if dry camping. While driving the engine alternator maintains the batteries and, of course carries the refrigerator via the inverter. I have 3 factory solar panels (95 watts each) on the roof. They will basically extended the recharge time another 24 hours or so.

Once you have a residential refrigerator in a motorhome you will never want another RV style frig!

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Old 09-04-2017, 10:04 PM   #5
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I have a Jenn Air domestic refer/freezer, 3000 watt PS inverter, 4 8D batteries, a 12.5 Onan and 400 watts of solar. I really don't know how long I can dry camp.
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Old 09-04-2017, 10:59 PM   #6
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Most solar panels that the factory puts on the room at 100 Watt. Residential panels get up to just over 300 watts. Based on the limited room on the roof due to vents, antennae, A/C units, dishs etc, you can only realistically get 4 panels up there. That's a total of 400 watts using RV type panels. A 15k BTU A/C unit like the ones on most coaches require approx 1750 Watts for startup so it will be a while unit solar technology makes this possible.
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Old 09-04-2017, 11:20 PM   #7
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As I said earlier, I have 400 watts of solar (4 -100 watt panels) and I have room for at least 4 and possibly 8 more depending on how much walking room I want to give up.
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Old 09-04-2017, 11:34 PM   #8
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I was told by AM Solar outfit here in OR that I could put up to 8 possibly 9 160 watt panels on our roof....but i do not have the room for the extra batteries needed for the full meal deal. So will just run the gennie when needed for our residential fridge
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Old 09-04-2017, 11:41 PM   #9
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We have residential refrigerator, six GC2 batteries, and 1500w of solar flat on the roof. More than ample to support the RR.

Air conditioning support via batteries/solar is typically not practical. However you will find some folks have very expensive and advanced systems that will.
Vince and Susan
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Old 09-05-2017, 07:20 AM   #10
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We have 4 160 w panels, 4 costco GC batteries for a total of 420 AH which can safely be taken down each night to 210 AH but we never go that low. Our fridge is a Fridgidaire 10 cf and it can suck as low as zero amps and as high as 12 amps per hour or so depending on its cycle. We like to estimate it at an average of 5. Because the solar covers it during the day (generally) we figure we take the batteries down overnight (15 hrs or so?) an average of 75 although some night's it's as low as 45 if it doesn't do a defrost or whatever cycle. We don't monitor fridge by itself so that would include other small loads like LED lights (not furnace or charging devices etc).
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Old 09-05-2017, 07:32 AM   #11
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We have converted our Canyon Star to a residential fridge. We have a lot of other usage (microwave, CPAP, computers, chargers etc), so our average use is about 150AH per day. With 400AH of lithium (equivalent to 800AH of lead acid because they can be discharged almost 100% without damage) and 570W of solar on the roof we can go a couple of days without sun before I get worried.

We can and have run one A/C off the batteries, however there's no way our solar can keep up with the drain. We can run for about 2 hours continuously before the genny auto-starts.
Stewart, Brenda and kids
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Old 09-05-2017, 07:47 AM   #12
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We have 3 @ 165 watts (total of 495) of solar panels, a 3000W 12VDC Pure Sine Hybrid Inverter Charger and 8 AGM batteries. Without being too conservative in our energy usage we usually wake up to about 12.4 to 12.6 volts on our house batteries. Our Whirlpool 19.7 cuft refrigerator is quite efficient and works well off our batteries.
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Old 09-05-2017, 10:24 AM   #13
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I have a Samsung residential refrigerator with 4 6v lead acid batteries and no solar. We boondock at Walmart on the way to Fl from Mi. Usually stop at 7pm and leave around 8am with minimal use of lights , furnace blower (sometimes depending on weather) and coffee pot in the morning. Batteries are usually depleted to 50% (max for lead acid) when we leave after one night. If we stay longer I fire up the Jenny.

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Old 09-05-2017, 11:00 AM   #14
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We have a DSDP 4041; 1920 watts of solar and about 800 watts of lithium batteries. No problem with the refrigerator and one of the ACs

Connie and Lisa (both pups have crossed the rainbow bridge). Our blog: arizonalizards.com or bird photography: zenfolio.com/arizonabirder
Newmar Dutch Star 4041 2016 towing a Dodge Ram 1500
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fridge, power, solar

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