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Old 02-04-2019, 02:31 PM   #29
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If your thinking of a generator that can run either of your AC's individually, with no modifications, take a look at the Champion Dual Fuel. We use with propane; about $900 and plenty power for one AC and other appliances. It does weigh 95lbs...if you want a lighter generator, (45lbs) suggest looking at the Honda 2200 with the Easystart installed...just money, of course.

We had solar installed on our 2008 25' AS by the previous owner...big heavy batteries, converter, etc...we could run the AC for 3 hours without any shore power or generator...but then we had to plug into something. Some of these Li battery equipped rigs folks talk about here are very appealing for sure...it's just money... Good luck...please share when you get your updates installed.
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Old 02-05-2019, 02:01 AM   #30
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Originally Posted by lewster View Post
Hi Lindenwood,

If you are interested in a solar power system, please contact me at: 4rvsolar@gmail.com so that we can have a discussion.

Thanks!
Thanks for reaching out! Email sent!
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Old 02-05-2019, 08:43 AM   #31
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In the ballpark

Thatís probably the range. But the installer pros can give you real numbers for what YOU want.

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About how much did you guys spend on these major electricsl upgrades? They look like 15-20k jobs, no?
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Old 02-06-2019, 01:26 PM   #32
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I've been chatting with Lewster; he really seems like a great guy with a lot of knowledge and passion. Not sure I'll be able to have him to the work, largely for logistical limitations (we are moving to NM soon before actually buying the Airstream), but he gave me great options for a possible kit that I could then install myself.

Thanks everyone for the recommendations!
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Old 02-06-2019, 08:29 PM   #33
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Can everything, including the AC, be wired to run off the batteries?

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Originally Posted by Lindenwood View Post
I've been chatting with Lewster; he really seems like a great guy with a lot of knowledge and passion. Not sure I'll be able to have him to the work, largely for logistical limitations (we are moving to NM soon before actually buying the Airstream), but he gave me great options for a possible kit that I could then install myself.

Thanks everyone for the recommendations!


I live in Denver. I drove the trailer to his fort hood shop for the work. 2 day drive (sat+sun). It was worth it! NM is not that much further south

I dropped the trailer with Lew and flew out of Portland same day (Monday) to do business for 2 weeks. Flew back in on a Thursday, picked it up Friday, met the family back in Portland (they all flew up Friday) then we did a tour down the Oregon and California coast before heading east to Moab and Denver. Awesome trip

Think about it!

PS - I had a big install - would have been 100+ man hours if I did it myself (I had the skill, just not the time).

Lew is top notch. Worth the money. You can also apply for a tax credit on the equipment and labor. Iíll get 1/3 of the cost back in my 2018 taxes - which covers the labor
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Old 02-07-2019, 06:51 AM   #34
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Well hell...sold!
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Old 02-07-2019, 08:56 AM   #35
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In one of the older lithium battery threads, someone posted estimates of how long you could run the A/C off of a super-duty lithium/solar setup, with some variables like temp and sun set forth.

Would be interesting to know how much "oomph" this battery-only solution to running the A/C has.

Peter
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Old 02-07-2019, 10:03 PM   #36
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Can everything, including the AC, be wired to run off the batteries?

At 75 or so degrees outside troutboy ran his AC for about 3 hours or so on 400ah of lithium IIRC.

At 90 degrees Iíve run my 15k penguin II pretty much pegged for 2+ hours with no issues with 600ah, and still had capacity to spare.

While running when itís hot out, the AC will ramp up and peg at just about 1,800 watts draw from the inverter. (I have a multiplus 3k rated at 2,400 watts continuous output)

With a few other house loads (likes our ice maker, television, fridge on LP, etc) and inverter losses your drawing about 2,000 - 2,200watts or about 150-165 amps from the batts continuously (the AC compressor does not cycle often when itís really hot out).

As a point of reference 3 hours at this load is 450-500 amp hours or 75%-80% of total capacity for my lithium bank, assuming your starting with 100% in the morning. Then things get dark Ďcause youíve used all your capacity

However! Solar helps big time! When itís nice and sunny out in June my panels will generate peak output of 600 to 800 watts (42-55 amps @14.2v to the batteries!) between 10.30a and 1.30p to help offset the power draw from the batts... extending timeframes / leaving some power for overnight.

We regularly run our AC for 1 hour + when stopped for lunch on the road, etc. itís super convenient.

If itís gonna be a really hot and long day, and we are at camp, and itís not an annoyance to others, Iíll run my little honda 2000 on propane and pull 10-12amps from it as shore power, and use the hybrid function of the multiplus to supplement that with battery and / or solar energy to supply the AC. I can pretty much run all day in hybrid mode. I rarely get 15 amps @120v from my honda because we tend to camp above 8,000 feet so output is reduced on the genset.

Lithium rocks. And we like our little mini sonic ice maker which requires ďalways onĒ 120v house power who doesnít like a nice cold cocktail after a long day of hiking or cycling
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Old 02-08-2019, 03:29 AM   #37
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. . .
Lithium rocks.
. . .


Thanks for taking the time to provide all those details -- very helpful.

From our limited experience with small lithium batteries for tools and so forth, the new battery technologies are truly amazing.

Peter
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Old 02-08-2019, 06:16 AM   #38
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Linden wood, the Greatlys gets the award for his/her answer for what I think you are asking. If you want to supplement 120vac via battery while running higher loads than the genny can make, a hybrid inverter can do this. Victron and Magnum makes these. I know Victron lets you set the shorepower (or generator) current limit and presents it to you real-time and graphically. You will need roughly a 3000/4000 watt hybrid inverter and enough usable A/h from your batteries for your needs. Probably looking at a fairly robust LFP bank. This setup is also good for moochdocking in a driveway where you might only have barely 15amps available. Clint
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Old 02-08-2019, 10:39 AM   #39
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Originally Posted by wulfraat View Post
At 75 or so degrees outside troutboy ran his AC for about 3 hours or so on 400ah of lithium IIRC.

At 90 degrees Iíve run my 15k penguin II pretty much pegged for 2+ hours with no issues with 600ah, and still had capacity to spare.

While running when itís hot out, the AC will ramp up and peg at just about 1,800 watts draw from the inverter. (I have a multiplus 3k rated at 2,400 watts continuous output)

With a few other house loads (likes our ice maker, television, fridge on LP, etc) and inverter losses your drawing about 2,000 - 2,200watts or about 150-165 amps from the batts continuously (the AC compressor does not cycle often when itís really hot out).

As a point of reference 3 hours at this load is 450-500 amp hours or 75%-80% of total capacity for my lithium bank, assuming your starting with 100% in the morning. Then things get dark Ďcause youíve used all your capacity

However! Solar helps big time! When itís nice and sunny out in June my panels will generate peak output of 600 to 800 watts (42-55 amps @14.2v to the batteries!) between 10.30a and 1.30p to help offset the power draw from the batts... extending timeframes / leaving some power for overnight.

We regularly run our AC for 1 hour + when stopped for lunch on the road, etc. itís super convenient.

If itís gonna be a really hot and long day, and we are at camp, and itís not an annoyance to others, Iíll run my little honda 2000 on propane and pull 10-12amps from it as shore power, and use the hybrid function of the multiplus to supplement that with battery and / or solar energy to supply the AC. I can pretty much run all day in hybrid mode. I rarely get 15 amps @120v from my honda because we tend to camp above 8,000 feet so output is reduced on the genset.

Lithium rocks. And we like our little mini sonic ice maker which requires ďalways onĒ 120v house power who doesnít like a nice cold cocktail after a long day of hiking or cycling
Great info! Thank you
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Old 02-08-2019, 06:42 PM   #40
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Okay, the wife is pretty sold on the investment. I often have to leave for months at a time for work, and she would prefer to go home with the kids to be around our families. The ability to easily "moochdock" (I love that phrase!) for short periods is really appealing to her!
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Old 02-08-2019, 07:14 PM   #41
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Okay, the wife is pretty sold on the investment. I often have to leave for months at a time for work, and she would prefer to go home with the kids to be around our families. The ability to easily "moochdock" (I love that phrase!) for short periods is really appealing to her!
We originally intended our rig to be mainly for boondocking, but I gotta tell you, we spend more time moochdocking than anything else. It's really helpful to be set up to run reasonably well on a 15A outlet. Makes it much easier to be where you need to be, when you need to be there.
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Old 02-10-2019, 11:39 AM   #42
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You can wire the air conditioner to run off the batteries, using a 3000watt inverter, but be advised that when inverting 12v to 120v, you need to multiply the watt draw by 10x. You'd be drawing 30000 watts, or about 300 amps, to start the air conditioner. Even the biggest, baddest batteries won't hold up long to that load.
Some people have wired their air conditioner to run for a brief period on their batteries, using an inverter, but basically only for a few minutes to take the heat out of the trailer, then it's back to windows and vents.
You would also need a huge bank of solar panels to have any hope of replenishing the batteries between uses.
Also, if you are planning to do this in Florida, be advised it is a state law that any residence is required to be connected to the power grid.
I think someone already responded, but you don't increase the wattage by 10x, you increase the amperage.
Just remember simple formula:
Volts x amps = watts.
So 10 amps at 120v =1200 watts, or
100 amps at 12v = 1200 watts.
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