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02-28-2021, 02:22 PM
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#1
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Senior Member
Join Date: Jan 2021
Posts: 513
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Can you run AC with inverter turn on?
Hi,
Have anyone run the AC with the build in inverter turned on? If so how long does it last? I'm thinking it will not turn on because the inverter is only 1000watt and the AC needed 1300 watt.
Is my logic correct?
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2021 Geo Pro 20BHS
2020 Tacoma TRD SPORT 4x4
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02-28-2021, 03:18 PM
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#2
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Site Team
Join Date: Jan 2007
Location: Goodyear, Arizona
Posts: 33,556
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Quote:
Originally Posted by aboyz
Hi,
Have anyone run the AC with the build in inverter turned on? If so how long does it last? I'm thinking it will not turn on because the inverter is only 1000watt and the AC needed 1300 watt.
Is my logic correct?
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No, your logic is not correct.
You need to educate yourself on RV electrical systems. Google "the 12 Volt Side of Life".
All the inverter does is turn 12v battery power to 120v AC power.
So unless you had a 2000w+ inverter and a bank of 10 deep cycle batteries, you can't run the a/c.
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Dan-Retired California Firefighter/EMT
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02-28-2021, 03:44 PM
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#3
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Senior Member
Join Date: Jan 2021
Posts: 513
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Quote:
Originally Posted by bikendan
No, your logic is not correct.
You need to educate yourself on RV electrical systems. Google "the 12 Volt Side of Life".
All the inverter does is turn 12v battery power to 120v AC power.
So unless you had a 2000w+ inverter and a bank of 10 deep cycle batteries, you can't run the a/c.
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got it.. AC need power or a generator with 2200 watt.
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2021 Geo Pro 20BHS
2020 Tacoma TRD SPORT 4x4
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02-28-2021, 03:46 PM
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#4
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,263
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Quote:
Originally Posted by bikendan
No, your logic is not correct.
You need to educate yourself on RV electrical systems. Google "the 12 Volt Side of Life".
All the inverter does is turn 12v battery power to 120v AC power.
So unless you had a 2000w+ inverter and a bank of 10 deep cycle batteries, you can't run the a/c.
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Not to mention a really BIG Converter/Charger to recharge the batteries. The regular Converter/charger would probably take 7-10 days to recharge the batteries and maybe more if not LiFePo4's.
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"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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02-28-2021, 03:47 PM
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#5
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Senior Member
Join Date: Jan 2021
Posts: 359
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Quote:
Originally Posted by aboyz
got it.. AC need power or a generator with 2200 watt.
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Yes and probably an easy start kit on the AC otherwise you probably need a 3500 watt generator.
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TT - 2021 Rockwood 2608BS
TV - 2020 F-250 XLT 4WD SRW 6.2L gas
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02-28-2021, 03:50 PM
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#6
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Site Team
Join Date: Oct 2014
Posts: 15,243
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As mentioned, you can not run your AC on your inverter.
Just as a reference. For every 1 hour you run the inverter at 1000W (running other things), you will use 85AHrs from your batteries. If you have two of the deep cycle batteries usually provided with a TT ( Really Marine dual purpose batteries vs actual deep cycle). They will be below 50% charge in an hour.
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02-28-2021, 03:56 PM
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#7
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,263
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Quote:
Originally Posted by Flybob
As mentioned, you can not run your AC on your inverter.
Just as a reference. For every 1 hour you run the inverter at 1000W (running other things), you will use 85AHrs from your batteries. If you have two of the deep cycle batteries usually provided with a TT ( Really Marine dual purpose batteries vs actual deep cycle). They will be below 50% charge in an hour.
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With these numbers in mind to get a days running of A/C when running off batteries one would literally need a "Ton of batteries" (around 16 or more 12 V Deep Cycle Batteries).
__________________
"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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02-28-2021, 04:04 PM
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#8
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Senior Member
Join Date: Sep 2020
Location: Maine
Posts: 1,478
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Quote:
Originally Posted by bikendan
No, your logic is not correct.
You need to educate yourself on RV electrical systems. Google "the 12 Volt Side of Life".
All the inverter does is turn 12v battery power to 120v AC power.
So unless you had a 2000w+ inverter and a bank of 10 deep cycle batteries, you can't run the a/c.
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Not only this, but almost all electric motors have a start wattage demand that is in excess of the wattage of the electric motor. So you need an inverter that is probably at least 2000 watts. You also need a sizable battery bank. Take your total battery watt hours (AH x12) and divide it by, in your case, 1300 and that is the number of hours of run time, if you could start the air conditioner.
One 100AH lithium battery has 1200 watt hours, so I would recommend 6 lithium batteries at 1000 dollars a piece-not really worth it. It is my understanding that there are smaller third party air conditioners that use around 700-800 watts. Hope this helps
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02-28-2021, 05:20 PM
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#9
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Senior Member
Join Date: Oct 2020
Location: South Central Virginia
Posts: 882
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The AC unit is typically not wired to the available inverter output(s). It is most often on a separate circuit breaker in the converter panel that feeds heavier gage wire direct to the AC unit. So even if you increased the inverter size and added more batteries the internal wire run would not connect to it.
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2021 Rockwood Mini Lite 2205S
2011 Ford F-250 Super Duty 6.7L Diesel
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02-28-2021, 05:44 PM
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#11
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Senior Member
Join Date: Oct 2020
Location: South Central Virginia
Posts: 882
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Yours is a nicely done custom setup. Kudos to you! The OP, with his original 1Kw inverter, would need a medium sized basket of cash to get on par with you.
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2021 Rockwood Mini Lite 2205S
2011 Ford F-250 Super Duty 6.7L Diesel
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02-28-2021, 10:06 PM
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#12
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Just as confused as you
Join Date: Aug 2013
Location: south central Wisconsin
Posts: 5,108
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Quote:
Originally Posted by 270S
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With the problem OP has understanding the difference between AC (alternating current) and A/C (air conditioner) and 120 volts AC verses 12 volts DC (direct current) he doesn't have the knowledge to tackle such a project on his own. It would be nice if you tell the OP how much total money you have invested in it over the decades and that you know how to set it up. Not everyone has the knowledge to do a custom setup or the money to invest in a system like yours.
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Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, Seasonal since 2000.
Car Shredder Op/Tech, Scrap Metal Recycling - retired
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02-28-2021, 11:23 PM
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#13
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Senior Member
Join Date: Jan 2021
Posts: 513
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Quote:
Originally Posted by Scrapper
With the problem OP has understanding the difference between AC (alternating current) and A/C (air conditioner) and 120 volts AC verses 12 volts DC (direct current) he doesn't have the knowledge to tackle such a project on his own. It would be nice if you tell the OP how much total money you have invested in it over the decades and that you know how to set it up. Not everyone has the knowledge to do a custom setup or the money to invest in a system like yours.
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Yeah. I'm afraid I cannot tackle that project. Cost too much and the DIY is limited.. I think I'll just get two 2000 watt generator and link them together and call it a day
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2021 Geo Pro 20BHS
2020 Tacoma TRD SPORT 4x4
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03-01-2021, 12:33 AM
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#14
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Senior Member
Join Date: Apr 2014
Location: Gainesville, FL
Posts: 4,549
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Quote:
Originally Posted by aboyz
Yeah. I'm afraid I cannot tackle that project. Cost too much and the DIY is limited.. I think I'll just get two 2000 watt generator and link them together and call it a day
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You can run your A/C with a single 2KW inverter generator. With a 13.5K BTU, add a booster capacitor ($20, max), turn the fan on first and leave it in "on" mode, then turn on the A/C. By leaving the fan running you avoid the start surge of both motors starting at the same time. You can do the same thing with a $10 fan delay relay.
If you have a 15K BTU A/C, you'll need a soft-start device like a Microair EasyStart.
In either case, you won't be able to run the A/C and much else, simultaneously. In particular, you can't run the A/C and the microwave oven. Take your pick of one.
With 2 generators you can run more things at one time but at extra cost and upkeep. Two together may be quieter than one running at higher speed. I don't find my Honda eu2000i loud, even say full speed. (Others may disagree.)
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TV: 2021 Ford F-150 4WD XLT Crew w/ 3.5L EB & HDPP, payload: 2,416#.
RV: 2020 Rockwood Mini-Lite 2507S, Propride 3P hitch w/ 1400# spring bars
Camping nights: 2021, 52; 2022, 99; 2023, 88; 2024, TBD (Est: 80+)
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03-01-2021, 01:33 AM
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#15
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Senior Member
Join Date: Jan 2021
Posts: 513
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Did some more research and reading. I think WEN fit my budget .
I'm planning to get two of this.
https://wenproducts.com/collections/...carb-compliant
and get the parallel adapter. and I should be good
and look at the weight 39lbs .. wow!!!
thank you all..
__________________
2021 Geo Pro 20BHS
2020 Tacoma TRD SPORT 4x4
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03-01-2021, 08:02 AM
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#16
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Senior Member
Join Date: Mar 2016
Posts: 1,060
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Some may miss the point. $$$ aside, I run my Air Conditioning during the summer heat in National Parks at night during no generator hours and sleep wonderfully. I can then run the generator in the morning during normal allowed run times to recharge the batteries for the next night. I understand, but complaining about cost is similar to the camper next to you in a tent complaining about the cost. Do what you can with your funds available. It doesn't make one solution right or wrong, just not affordable. But if you have apx $3-4K available, the solution I showed with batteries, wiring, and inverter/charger is a "right" solution. Fyi, the money many spend at commercial parks with their $50-200+ per night stay for the convenience of a plug in, adds up quickly and could be avoided and pay for the system I laid out rather quickly. On a 90 day trip (before C19), I plugged in 0 times.
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03-01-2021, 08:14 AM
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#17
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Senior Member
Join Date: May 2015
Posts: 1,051
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Quote:
Originally Posted by 270S
Some may miss the point. $$$ aside, I run my Air Conditioning during the summer heat in National Parks at night during no generator hours and sleep wonderfully. I can then run the generator in the morning during normal allowed run times to recharge the batteries for the next night. I understand, but complaining about cost is similar to the camper next to you in a tent complaining about the cost. Do what you can with your funds available. It doesn't make one solution right or wrong, just not affordable. But if you have apx $3-4K available, the solution I showed with batteries, wiring, and inverter/charger is a "right" solution. Fyi, the money many spend at commercial parks with their $50-200+ per night stay for the convenience of a plug in, adds up quickly and could be avoided and pay for the system I laid out rather quickly. On a 90 day trip (before C19), I plugged in 0 times.
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2017 Coachman Chaparral 336TSIK
2015 F350 6.7
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03-01-2021, 08:21 AM
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#18
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Site Team
Join Date: Oct 2014
Posts: 15,243
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Quote:
Originally Posted by TitanMike
With these numbers in mind to get a days running of A/C when running off batteries one would literally need a "Ton of batteries" (around 16 or more 12 V Deep Cycle Batteries).
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The math behind this statement. 85A X 12V = 1020W ( accounting for efficiency). Running for 1 Hr is 85AHr. The standard 12V battery provided by dealers on new TTs is Group 24 Marine Battery 70-80AHr capacity.
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03-01-2021, 11:01 AM
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#19
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,263
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Quote:
Originally Posted by Flybob
The math behind this statement. 85A X 12V = 1020W ( accounting for efficiency). Running for 1 Hr is 85AHr. The standard 12V battery provided by dealers on new TTs is Group 24 Marine Battery 70-80AHr capacity.
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We're on the same page. I was just pointing out the amount of weight one would add to their MH/TT just to run A/C.
A generator for A/C is still the only practical option for most, either because of weight/space restrictions or small $$ resources.
Also, just how long does one need to run the A/C? 3-4 hours during the hottest part of the day? Or 24/7 due to either extreme heat, high humidity, or both?
__________________
"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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03-01-2021, 12:16 PM
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#20
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Senior Member
Join Date: Mar 2016
Posts: 1,060
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I guess some didn't look at the other posted thread with pictures. So that you don't hurt your fingers, here are the 24 batteries - NOT!!!!!!!!
Front and back views - 4 6Vdc batteries. Overnight consumption is only half of 1 of the 4 batteries. Sorry to disappoint.
For the math, 4 6Vdc @ 400 Ah = 800Ah @ 12 Vdc. Overnight consumes apx 100Ah @ 12 Vdc or less depending on temperature.
FYI, Grand total weight added is apx 500pounds well spent/used including the 5Kw Inverter/Charger I also installed myself. I'm not as big as some RVers, so the added weight is not a factor. Just kidding. Unlike MOST, I did a weight and balance and my rig is at exactly 17999 or less when I first depart home with full clothes, food, fuel and water. Yes, I travel with a full water tank.
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