jimjr
Weekender RV’er
Posts: 60
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Post by jimjr on Apr 11, 2022 20:16:39 GMT -5
The wife and I are new 231VRL owners. Ours has the Furrion 7 cu ft 12vdc fridge and the solar package. About to take it on our second trip and in preparation, I plugged it in to the house over the weekend and (among many other things) started up the fridge last evening. Since we live in a community with an HOA and I can’t keep it in my driveway, around 11pm, I set the fridge to “off grid”, unplugged the trailer from my house and moved it to the “sanctioned” RV parking in our community. The battery was connected and the cut off switch was “on” and the Sun was in and out here all day- enough that I was surprised when I went to the trailer this evening and found that its totally dead.
In essence, the only thing that was on was the fridge. It was around 70 here. The fridge manual says it should run fine that way but obviously It’s not. What an I doing or reading or understanding wrong?
Thanks!
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Post by Doug&Carolyn on Apr 11, 2022 21:15:39 GMT -5
What kind of battery do you have and what is the Ah (amp hour) rating? I am assuming it's a deep cycle Marine/RV battery. Is the battery new? Hopefully you'll get it figured out.
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Post by tallguyvr on Apr 11, 2022 21:24:02 GMT -5
We have a 2021 190vrb with the solar ‘package’ which is only a 100 watt solar panel. This is considered a trickle charge and you need at least 200 watts of solar panels to be useful from what we’ve been told.
But ours has the regular fridge so I couldn’t tell you about consumption…..
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jimjr
Weekender RV’er
Posts: 60
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Post by jimjr on Apr 11, 2022 21:57:26 GMT -5
It’s a new marine/RV deep cycle battery. 550 cca 690 mca 140 rc. I’ve had it around a month. Oh, and the fridge is the 8 cu ft that the label says is 12vdc 11amps.
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Post by Doug&Carolyn on Apr 12, 2022 21:22:20 GMT -5
It’s a new marine/RV deep cycle battery. 550 cca 690 mca 140 rc. I’ve had it around a month. Oh, and the fridge is the 8 cu ft that the label says is 12vdc 11amps. 140 Ah is equal to 70 Ah available. Lead acid batteries should never be discharged beyond 50%. So 11 amp draw is pretty significant. Granted the fridge won't run the whole time, however each time the compressor kicks on there is a much higher momentary amp draw. The is other parasitic draw from detectors, Soundsystem and etc. I have two 12v 140ah batteries in parallel and I can safely run my 10 cu. Ft. 12v fridge and other parasitic draws from dawn to dusk. |
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marjim
Weekender RV’er
Retired EE, Vietnam Vet, God, Faith, Family & Flag. St. Louis area
Posts: 99
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Post by marjim on Apr 13, 2022 8:34:36 GMT -5
I am curious why you didn't use the LP option instead of 12VDC. Does your fridge run both LP and 12VDC. In prepping for a trip, I use the shore power to get the fridge cold and switch to LP for a longer than 4hr ride to campsite. That way I am still charging the camper battery (Duracel AGM (marine) deep cycle as we drive. I have not done the overnight thing without shore hookup, but the RV tech said gas is stable for longer pull trips.
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jimjr
Weekender RV’er
Posts: 60
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Post by jimjr on Apr 21, 2022 16:10:12 GMT -5
This isn’t a dual-option fridge. It’s 12VDC only Furrion FCR08DCGTA-BL. There is an “Off-Grid” setting for when “grid power is not available”. Per the manual, during travel the unit can be operated at normal temperature setting. It does run fine then— the only issue I have is when it’s on this “Off-Grid” setting and am running on solar.
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Post by riobob on Aug 31, 2024 15:39:25 GMT -5
the fridge is 12 volt only and consumes 80Ah depending on open/close and environment temps. if you multiply MCA by .107 you get the approx AH of the battery. If chemistry is led acid 1/2 of that is really usable and the decline past that is fast. the battery on your trailer is for the break-away not sustaining dry camping.
the above numbers are with many conversations between furion, and others. if you take the on-line spec of 1000w/day and divide that by 12 volts, you again see 84Ah so to replenish this you need 4 100 watt panels (most will be only 80 or so installed)
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Post by nodrog on Sept 6, 2024 16:16:06 GMT -5
....the above numbers are with many conversations between furion, and others. if you take the on-line spec of 1000w/day and divide that by 12 volts, you again see 84Ah so to replenish this you need 4 100 watt panels (most will be only 80 or so installed)
Thank you riobob for laying out the realty of solar. I'm all for solar to become economical and practical but more people need to realize we have a long way to go before we are out of the 'trendy-gimmick-fad' stage.
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Post by riobob on Sept 24, 2024 20:48:38 GMT -5
Look at eBay, eco worthy has lifepo4 batteries on sale to end of month. I have a SN231vrk and based on estimates I need 97 ah per day. So 2 100 ah batteries would suffice with overcast days. Need 8 100 watt solar panels.in most areas of us to fully charge both batteries. I am going to install 4 on rv I will ground base others. My converter is 55 amp so in most cases a small inverter generator 3 hours will give me 2 days. A soft start on the air conditioner will allow start up at 13 amps so a small generator will run it when necessary. I want solar for boonbocking but it is not a cheap adventure.
yourdischarge on lead acid should be no more than 50%, on LiFePo keep above 20% so you can discharge to 80% and batteries work better, last longer..
pm if you need more
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