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Old 05-16-2019, 04:30 PM   #31
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My husband and I have 300 AH lithium, 300 watts solar, and a 2,000 watt inverter. We can run our roof a/c for about 2 hours on battery. I also run it on the OEM generator at times.

Among my security DIY installations is a Canary IP camera which includes climate monitoring (temp and humidity) sent to my phone in real time (the Canary is enabled by a Netgear air card that I include on my main cellular account with Verizon).

Because I have this particular Canary (we own several similar devices) mounted near the curb side upper front "corner" of the van, it is right near the roof and reports a much hotter temp than the van actually is down at the level of my dog. From experience, I know what the correlation looks like (depending on the sun angle, it can read about 15 degrees hotter than the temp at her location).

When I leave her in the van in urban areas, and in conditions when it may become hot, I always have this live link to the Canary. Always. If conditions change in the van, I can see it on my iPhone in real time, and I can return to the van immediately. Thus, I'm not trusting her safety to any one system that might break down unexpectedly.

Red arrow pointed at her, all the way in the back. The Canary is optimized for closer facial recognition, so a bit blurry in the background:

Thanks, InterBlog! May I ask what brand/model RV you have?
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Old 05-16-2019, 07:08 PM   #32
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So, once you deplete your batteries how are you going to recharge them? Generator for many hours? Idling? A Sprinter is not recommended for more than 2 hours and if you donít have a second robust alternator you are only going to put back 80ah. Or do you have to just get up and drive all day? Think about it. If you need air conditioning overnight you will most certainly need it during the day. These claims of multiple hours off-grid give false hope or coming from a sales department not knowing reality. Coachmen is doing the same as the Roadtrek boast.
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Old 05-16-2019, 07:40 PM   #33
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Is that the smaller BTU systems? Also, to get 16 hours runtime what conditions are we talking about? Is it Pacific Northwest or south of Tampa? Do you advise your clients of any time limits for idling the engine? Is that limit enough to get the system ready for another 16 hour runtime session or would they have to hit the highway for a long drive on day 2?

The more info you can provide the better off we'll all be.
Hey, Marko great questions. Our recommendations are based on current draw on high/Max. Take the Kingtec k20d we use for rooftop installations, which draws 42-45 amps on high. We install at least 800Ah (usable) LiFePO4 battery and a Nations 280 amp aux alternator. We advise clients to only idle for short periods (1-3 hours) followed by a spirited drive for at least 30 minutes after long idling.
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Old 05-16-2019, 07:59 PM   #34
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Hey, Marko great questions. Our recommendations are based on current draw on high/Max. Take the Kingtec k20d we use for rooftop installations, which draws 42-45 amps on high. We install at least 800Ah (usable) LiFePO4 battery and a Nations 280 amp aux alternator. We advise clients to only idle for short periods (1-3 hours) followed by a spirited drive for at least 30 minutes after long idling.

13.5K BTU and 45A at 12V DC according to a spec sheet I found ! That's really good.


Kingtech.png
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Old 05-16-2019, 08:57 PM   #35
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Kingtec k20d:

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13.5K BTU and 45A at 12V DC according to a spec sheet I found ! That's really good.
Ouch! $3500 on eBay, even more on Amazon.

May as well go with the ARV unit.

Anybody know if it quiet?
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Old 05-16-2019, 09:14 PM   #36
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Kingtec k20d:



Ouch! $3500 on eBay, even more on Amazon.

May as well go with the ARV unit.

Anybody know if it quiet?
We donít charge clients that much. If you want one we are dealers and can provide service.

I think it is quiet. I have one here on the floor at the shop. I will unbox it and fire it up. You want to FaceTime to listen to it?
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Old 05-19-2019, 04:20 PM   #37
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Thanks for responding. Then how do single people with pets travel full time in an RV? I know they do so surely there is a way to deal with it safely. Otherwise, I cannot make this life decision for the future.
Do NOT buy an all-electric coach. Buy one with a propane furnace, a generator, and a roof AC unit. I've been traveling for nearly ten years with my Cavalier King Charles spaniels. If it's 60-75, leave the windows open and set the fantastic fan thermostat to move air through the coach and exhaust it at the roof. The coach will never get above ambient.

If it's going to be warmer than that, start the generator and run the roof air unit at the temp you'd like. If it's cooler, set the furnace thermostat.

It's really just that simple... unless you have the latest and greatest all-electric stuff... and I have absolutely NO advice to offer with that stuff. I do all my own RV repairs, and I wouldn't have the faintest idea how to work on that stuff... nor do I consider it reliable enough to trust my dogs to it. The propane furnace/generator/AC/Fantastic Fan solution has been the de rigeur solution now for nearly 30 years. It's tried and true equipment and is about as reliable as anything you can do in a house.
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Old 05-19-2019, 04:27 PM   #38
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Do NOT buy an all-electric coach. Buy one with a propane furnace, a generator, and a roof AC unit. I've been traveling for nearly ten years with my Cavalier King Charles spaniels. If it's 60-75, leave the windows open and set the fantastic fan thermostat to move air through the coach and exhaust it at the roof. The coach will never get above ambient.

If it's going to be warmer than that, start the generator and run the roof air unit at the temp you'd like. If it's cooler, set the furnace thermostat.

It's really just that simple... unless you have the latest and greatest all-electric stuff... and I have absolutely NO advice to offer with that stuff. I do all my own RV repairs, and I wouldn't have the faintest idea how to work on that stuff... nor do I consider it reliable enough to trust my dogs to it. The propane furnace/generator/AC/Fantastic Fan solution has been the de rigeur solution now for nearly 30 years. It's tried and true equipment and is about as reliable as anything you can do in a house.
It seems to me that Any ac system has to be backed up no matter the technology if the rv'er has dogs or .............

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Old 05-19-2019, 04:49 PM   #39
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It seems to me that Any ac system has to be backed up no matter the technology if the rv'er has dogs or .............

Bud
The point of failure on the all-electric systems seems to be the inverter, or the master panel, or the batteries' capacities. And when they fail, they fail catastrophically. I HAVE had an AC unit blow the starting condensor on a travel trailer. A local RV place replaced it in 30 minutes. Of course there can be failures, but in the old systems, they're almost non-existant and they generally give you warning. ANY RV place can work on them and has parts. When the new inverter equipment fails, you're not likely to find parts or service easily. And when you do, you'd better hope that all that equipment is under warranty. It's cool stuff... of that there is no doubt... but it's expensive, still not common, and with all the failures you read about, not yet reliable enough for my taste.

It took a good ten years' development for automotive ECU systems to be reliable, and longer yet for all of the ancillary devices to be more reliable than their mechanical/analog forebearers. RV systems will get there, but I don't believe they're there yet.

The backup to the AC unit failing, by the way, is the fantastic fan/windows and/or the dash-air unit. But in ten years of traveling with my dogs in a variety of motorhomes, I've never had a generator or AC unit fail in use. As a matter of fact, the dogs are why I switched from travel trailers to motorhomes; to have a generator to power the AC when I'm parked and out and about. The closest I had to a failure was a generator fuel line break, and that was repaired in an Auto Zone parking lot with a fuel line splice and about 30 minutes of my time.
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Old 05-19-2019, 04:50 PM   #40
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Propane fueled Onan Generator and a AGS system (automatic generator start). The generator will run at least 14 hours on 7 gallons of propane. The Lithium Battery systems may be the future but Iíll wait until they get all the kinks out.
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