Air Conditioner on a Generator - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-05-2009, 05:45 PM   #1
Senior Member
 
Trailer: 2013 Escape 19
Posts: 362
Last year, I converted a window air conditioner to use external to our Scamp, with the air piped in and out, looking a bit like the lunar lander. This year, we're probably going to spring for a Honda generator. I know that conventional wisdom is to buy the 2000 watt unit. Thinking my home window unit may have lower power requirements than the typical roof-top unit, I measured the current with a Kill A Watt meter. The max current I see is 8 amps at the moment the compressor comes on. If I play stupid and short cycle it by turning the temp up and immediately back down, it draws a huge amount of current and delays the compressor start. But if I let the unit cycle itself, it only draws 8 amps when starting and then drops back to 4 or less. Is there any tolerance with the Honda for a momentary spike, just in case I'm missing the actual peak current with my measurements? If I add a starting capacitor (what if there is already one there?) as has been described in a recent post (can't find it) would that help get me to a low enough starting load to get by with the 1000 watt generator? We don't have any other loads other than battery charging for our led lights (no microwave, etc). I would really like the lower cost/weight//size/fuel consumption of the 1000 watt unit, but I don't want to get stuck with something that won't do the job and then have to upgrade. Comments welcome!

Thanks,
Parker

__________________

__________________
Parker Buckley is offline   Reply With Quote
Old 05-05-2009, 06:08 PM   #2
Senior Member
 
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,030
Send a message via Yahoo to Darwin Maring
Parker,
The calculations show 960 Watts.
Volts 120 X 8 Amps = 960W. You would be pushing it to the limit.

Here’s a suggestion: Take the camper to a dealer that sells the Honda generators and let them demonstrate it on your camper.

If it does work and you purchase the 1K then you must only run the AC and nothing else and use 12gage wire as the smallest wire and as short as is practical. The lower the wire gage, the larger the wire. 10 is larger than 12 and 14 is smaller than 12.

It is important to have the Generator far enough away from the camper to insure you do not get carbon monoxide inside.

Personally, I would spend the extra $$ and get the 2000W model.
__________________

__________________
Darwin Maring is offline   Reply With Quote
Old 05-05-2009, 06:18 PM   #3
Senior Member
 
Trailer: 2013 Escape 19
Posts: 362
Quote:
Parker,
The calculations show 960 Watts.
Volts 120 X 8 Amps = 960W. You would be pushing it to the limit.

Here's a suggestion: Take the camper to a dealer that sells the Honda generators and let them demonstrate it on your camper.

If it does work and you purchase the 1K then you must only run the AC and nothing else and use 12gage wire as the smallest wire and as short as is practical. The lower the wire gage, the larger the wire. 10 is larger than 12 and 14 is smaller than 12.

It is important to have the Generator far enough away from the camper to insure you do not get carbon monoxide inside.

Personally, I would spend the extra $$ and get the 2000W model.
Yep, I did the math too and realize how close I am to the limit. Since this is a momentary load, I was hoping the Honda might withstand a brief period near the max rating and/or I could add the capacitor to the ac unit to soften the start.

Good idea on taking the ac unit to the generator dealer! I was going to order from Wise, but maybe I can find someone nearby.

Thanks,
Parker

__________________
Parker Buckley is offline   Reply With Quote
Old 05-05-2009, 07:14 PM   #4
Member
 
John H's Avatar
 
Trailer: 25 ft Bigfoot (25B25RQ)
Posts: 46
Make your test on a 100 degree day and maybe at 4000 ft altitude or higher and report back. I have found that it is not always starting load that is a problem. My AC will draw as much 300 watts more as the head pressure increases due to the high heat.
Make sure to let the compressor run for 15 minutes to insure max head pressure.

The little Honda is a great generator, but is only capable of less than 1000 watts (continuous) at its best at sea level and it will run it for a while and slowly lose the battle. Remember that 8 amps X 120 volts is 960 watts is what was measured, but what is the name plate current. I don't think the 1K Honda will handle it even under ideal conditions.
__________________
John H is offline   Reply With Quote
Old 05-05-2009, 11:07 PM   #5
Senior Member
 
Name: George
Trailer: Waiting for the Sprinter van and designing the converion modules.
Oregon
Posts: 629
Honda specification for EU1000I is 1000W max. and 900W is in its running mode (7.5A). I believe that using EU1000I would not be sufficient in your application. Just a simple measurement of AC current is not sufficient to make a judgment if EU1000I would be adequate. Power needed to start and run a compressor is related to power factor and a load to source impedance match. You could play with tuning capacitor on the compressor to improve power factor by but this could have been well engineered already. Everything else is fixed and, as recommended earlier, the actual test in full spectrum of conditions would be the best, ultimate test. Go with 2KW. Camping World has Honda 2000 for $999.

George.




__________________
GeorgeR is offline   Reply With Quote
Old 05-06-2009, 02:50 AM   #6
Senior Member
 
John Hussey's Avatar
 
Name: John
Trailer: 2000 16 ft Casita Spirit Deluxe
Florida
Posts: 169
Not Camping World for the Honda generator!

Buy from Wise sales instead and save yourself $130.00. I just bought my Honda eu2000i for $869.00 delivered to my door! Call on the phone to order. If Ed doesn't answer, ask for him. Mention this site to get their already discounted price lowered to the above.
__________________
John Hussey is offline   Reply With Quote
Old 05-06-2009, 06:40 AM   #7
Senior Member
 
Trailer: 2013 Escape 19
Posts: 362
Well, thanks all for your feedback. I suspected as much but thought there might be a glimmer of hope that the 1000 watt generator would do the job. I'll be ordering the 2000 watt machine from Wise. There is probably also a plus to buying the larger unit in terms of re-sale value, since that's what everyone else uses. This will start a whole new learning curve in terms of how to carry the generator (13' Scamp and Subaru Outback), setting it up, etc. Maybe a tongue box at some point, but there's not much room there. I'll try to get a plastic box for it to contain whatever gasoline smells there may be and probably carry it in the Scamp. Maybe a propane conversion at some point....anyway, here we go again.

Happy Trails!

Parker
__________________
Parker Buckley is offline   Reply With Quote
Old 05-06-2009, 11:23 AM   #8
Senior Member
 
Name: Ken
Trailer: No Trailer Yet
US
Posts: 1,564
THere are number of users at the yahoo honda generator groups using a EU1000 running the smallest window A/c unit you see in wal-mart.
__________________
Ken C is offline   Reply With Quote
Old 05-06-2009, 12:06 PM   #9
Senior Member
 
The Hobo's Avatar
 
Name: Ulysse
Trailer: 1976 Triple E Surfside
Posts: 172
Quote:
Not Camping World for the Honda generator!

Buy from Wise sales instead and save yourself $130.00. I just bought my Honda eu2000i for $869.00 delivered to my door! Call on the phone to order. If Ed doesn't answer, ask for him. Mention this site to get their already discounted price lowered to the above.
Can you post a phone # and/or link?
Thanks.
__________________
1976 Surfside Tripple-E
The Hobo is offline   Reply With Quote
Old 05-06-2009, 12:23 PM   #10
Senior Member
 
Joe Z's Avatar
 
Trailer: Casita
New River AZ
Posts: 1,043
Wise Sales

http://www.wisesales.com/HondaGenNEW.html
__________________
Joe and Linda
2013 Casita SD
Dodge Ram 4x4
Joe Z is offline   Reply With Quote
Old 05-06-2009, 12:34 PM   #11
Senior Member
 
Trailer: 2013 Escape 19
Posts: 362
Quote:
THere are number of users at the yahoo honda generator groups using a EU1000 running the smallest window A/c unit you see in wal-mart.
Yahoo Honda generator group??? Good grief! I guess I should have expected that. I remember commenting many years ago that there seems to be a magazine for every activity. In 2009, why not a user group?! I'll take a look, as we're probably talking the same size AC unit. If the AC starts softly, of its own accord, it doesn't draw much current. If I force it, such as switching on the power from an external source while the AC switch is already on, it draws a bunch of current. Thanks....I'm about to call Wise to order the 2000, but I'll try to find the Honda generator group first.

Parker
__________________
Parker Buckley is offline   Reply With Quote
Old 05-06-2009, 12:38 PM   #12
Senior Member
 
The Hobo's Avatar
 
Name: Ulysse
Trailer: 1976 Triple E Surfside
Posts: 172
Thanks for the link.
I called them for info,
but unfortunately,they won,t ship to Canada... Eh
__________________
1976 Surfside Tripple-E
The Hobo is offline   Reply With Quote
Old 05-06-2009, 01:33 PM   #13
Senior Member
 
Trailer: 2013 Escape 19
Posts: 362
Okay, the deed is done. I ordered the 2000 from Wise (talk to Ed!) for $869 along with their non-venting gas container. For mentioning Fiberglass RV, he threw in the DC charging cables. Cool! I just bought a $900 jumper system!

I did check the Yahoo group regarding experiences with the 1000. It sounds like the 1000 could possibly work if I'm willing to experience occasional breaker trips, etc., but I don't want to risk the frustration of all that.

Parker

__________________
Parker Buckley is offline   Reply With Quote
Old 05-06-2009, 06:15 PM   #14
Senior Member
 
Pete Dumbleton's Avatar
 
Trailer: Scamp
Posts: 3,072
Send a message via Yahoo to Pete Dumbleton
Quote:
Thanks for the link.
I called them for info,
but unfortunately,they won,t ship to Canada... Eh
Likely the reason they won't ship to CA is because the CA-spec and US-spec Hondas have different grounding wiring; the US-spec wiring will not meet CA requirements.

The result is that one cannot connect two CA-Hondas together for one output.
__________________

__________________
Pete Dumbleton is offline   Reply With Quote
Reply

Tags
generator


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Air conditioner add? Tom Myers Problem Solving | Owners Helping Owners 7 09-03-2015 05:46 PM
AIR CONDITIONER georgia g Problem Solving | Owners Helping Owners 19 01-01-2009 07:09 PM
Air Conditioner top CindyL Classified Archives 1 05-23-2007 09:53 AM
Air conditioner Sonny Problem Solving | Owners Helping Owners 5 06-22-2006 09:13 PM
Air Conditioner Louise Problem Solving | Owners Helping Owners 1 05-29-2006 11:01 PM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:41 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.