Reply
 
Thread Tools Display Modes
Old 09-01-2010, 12:54 PM   #11
Senior Member
 
NWJeeper's Avatar
 
Join Date: Aug 2008
Location: Enumclaw, WA
Posts: 2,617
One Dometic owners manual I found showed a start up load for a 13.5K AC at 54 amps and for the 15K unit 71 amps. Running amps were very close however, less than 2 amps.
__________________

__________________
"I can fix it, and if I can't fix it, I can fix it so no one can fix it!"
Ed & Wendy
2009 Georgetown 378TS | 1998 Jeep Wrangler | 1998 Skeeter ZX202C
Nights camped in 2009: 53 | Nights camped in 2010: 55
www.nwjeepn.com
NWJeeper is offline   Reply With Quote
Old 09-01-2010, 12:57 PM   #12
Member
 
2manytoyz's Avatar
 
Join Date: Sep 2006
Location: Cocoa, FL
Posts: 83
Quote:
Originally Posted by Time2Tow View Post
Thanks for the additional information. I do not use a generator when camping but I appreciate bringing this into the discussion. Getting different viewpoints is why I like these forums. Living in FL and having been through some close calls with hurricanes and losing power for a few days, I do now have a generator but never considered it and my camper as part of an evacuation plan. I actually considered it more of my back-up plan for a place to stay if the house got damaged. Since my generator is still in the box, I think I will check it for it'spower output. It is the peek of hurricane season.
I learned my lesson in 1995. Hurricane Erin, a lowly Cat 1 storm, thumped us. No power for 3 days, trashed all my trees.



Then in 2004, Frances and Jeanne thumped us 3 weeks apart. We evacuated in our MH (had a 36' Class A back then) to GA, then returned afterwards. It ripped shingles off the roof, but the paper was still intact. The roof was temporarily patched, then Jeanne showed up 3 weeks later. We stayed for that one. The patch held, but more shingles ripped off, pouring water into the master bedroom. I patched the damage the next day. No power, so we stayed in the MH for a few days, running the generator, living in comfort.

Coworkers in the nearby area, were without power for 18 days. One had a conventional generator, which consumes about 1.5 gallons per hour. The other had a Honda 2KW, which consumes about 1 gallon every 8 hours. Mine present generator consumes about 1.5 gallons every 8 hours or 4.5 gallons per day (1/4 load). A little math...

18 days x 24 hours x 1.5 gallons = 648 gallons!

18 days, x 4.5 gallons per day (Yamaha) = 81 gallons.

A conventional generator runs at a constant speed to make 60Hz. An inverter type generator makes 60Hz electronically from idle. The motor only runs as fast as the load demands, which can significantly reduce the fuel consumption.

During an outage at home, I will run 2 refrigerators, and a 5000 BTU A/C unit (window shaker) to cool one room. Not enough resources to cool an entire house. But I can make a single room 72 degrees, even in the middle of a FL Summer!

Measured #s:

Each fridge running ~140W-150W, defrost cycle ~600W
5000 BTU A/C unit running ~600W

So for the most part, my generator runs my critical loads from idle (1/4 throttle). Whisper quiet at 53 dB, very thrifty on resources. When storms approach, I fill ten 5 gallon gas cans. If those run out, we leave!

I tell you the story of my two coworkers as that was the lesson that convinced me to part ways with conventional generators (I had a Coleman 4200W), and now have the smaller Yamaha EF2400iS. It not only takes care of the camper, but also emergency power at home.

Didn't want to hijack the thread, but thought you might find the info useful.
__________________

__________________
Robert & Dawn
2007 Rockwood 2502
2010 F-150 FX4
Equalizer Hitch -w- 1000# bars
Yamaha EF2400iS generator
http://www.2manytoyz.com/
2manytoyz is offline   Reply With Quote
Old 09-01-2010, 01:03 PM   #13
Senior Member
 
Iggy's Avatar
 
Join Date: Jul 2010
Location: Desert SW - Arizona
Posts: 6,360
Why are you bring up electrical theory when all was asked if he should get a 13.5K AC unit or a 15K unit. I have a electrical degree and have been in the business for over 42 years so please it is not necessary to explain starting amp and running amps to me.
Thanks for a great demo with pictures.
__________________
2012 Georgetown XL - 378TS 60,000 miles
Life is a journey, not a destination !

Iggy is offline   Reply With Quote
Old 09-01-2010, 01:05 PM   #14
Senior Member
 
NWJeeper's Avatar
 
Join Date: Aug 2008
Location: Enumclaw, WA
Posts: 2,617
Thanks Robert and your story brings a good point to light about buying generators. The difference in cost of gas over a period of time will pay for that more expensive Yamaha or Honda generator vs buying an auto parts store cheapo (loud) generator which are usually not any where near the same quality either.
__________________
"I can fix it, and if I can't fix it, I can fix it so no one can fix it!"
Ed & Wendy
2009 Georgetown 378TS | 1998 Jeep Wrangler | 1998 Skeeter ZX202C
Nights camped in 2009: 53 | Nights camped in 2010: 55
www.nwjeepn.com
NWJeeper is offline   Reply With Quote
Old 09-01-2010, 01:06 PM   #15
Member
 
2manytoyz's Avatar
 
Join Date: Sep 2006
Location: Cocoa, FL
Posts: 83
Quote:
Originally Posted by NWJeeper View Post
One Dometic owners manual I found showed a start up load for a 13.5K AC at 54 amps and for the 15K unit 71 amps. Running amps were very close however, less than 2 amps.
That's great, some useful (to me) numbers! I couldn't find anything on the 15K unit, so I appreciate the info.

A hard start kit will help spin an A/C unit that's marginal by phase shifting, but wouldn't help with the 15K unit. That's a big difference in start up current!
__________________
Robert & Dawn
2007 Rockwood 2502
2010 F-150 FX4
Equalizer Hitch -w- 1000# bars
Yamaha EF2400iS generator
http://www.2manytoyz.com/
2manytoyz is offline   Reply With Quote
Old 09-01-2010, 01:20 PM   #16
Member
 
2manytoyz's Avatar
 
Join Date: Sep 2006
Location: Cocoa, FL
Posts: 83
Quote:
Originally Posted by Iggy View Post
Why are you bring up electrical theory when all was asked if he should get a 13.5K AC unit or a 15K unit. I have a electrical degree and have been in the business for over 42 years so please it is not necessary to explain starting amp and running amps to me.
Thanks for a great demo with pictures.
I bring it up because you said: "You are true that the 15K will draw more current but it is not much. The NEW 15K pulls 16 amps and the 13.5K about an amp less. That is minor but if you have a generator close to max load already yes it is an issue."

Again, running current isn't the issue. Starting current is. If he ever plans on running his A/C unit on a generator, the size of the A/C unit matters!

I didn't bring up theory, I showed you ACTUAL numbers. That's the problem with most discussions, lots of theories, very few facts.

There's no telling who the audience is, nor who the person talking is. I've been in the business a while too. And 'twasn't a lesson for you, but rather the OP, or anyone else considering a 13.5K vs 15K. The idea of getting a tad more cooling now sounds great. But having to lug around a $2K generator @ 200 lbs, might be an issue later if wanting to visit BLM land, or having to bail out during storm.
__________________

__________________
Robert & Dawn
2007 Rockwood 2502
2010 F-150 FX4
Equalizer Hitch -w- 1000# bars
Yamaha EF2400iS generator
http://www.2manytoyz.com/
2manytoyz is offline   Reply With Quote
Reply

Tags
rockwood

Thread Tools
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



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 08:04 AM.