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12-04-2010, 05:34 AM
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#1
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Rivet Master
2017 30' Classic
Loretto
, Ontario
Join Date: Oct 2010
Posts: 507
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AC Question
How much power is needed for a 15,000 BTU AC unite?
Would a 3000 watt generator / inverter do the job. I know 2 2000 watt Honda's work, but would prefer to carry just one. Generators over 3000 watts start to get heavy.
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12-04-2010, 06:22 AM
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#2
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Rivet Master
2009 27' FB Flying Cloud
1982 31' International
1991 35' Airstream 350
Jay
, Oklahoma
Join Date: Oct 2006
Posts: 1,706
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I have used the Honda 3 kw units with no problem. The AC will start and run with no problem. The electric start EU3000IS is very quiet and the electric start is great, but it is HEAVY to handle.
Best Regards,
__________________
Jeff & Cindy
'09 27FB Flying Cloud;'82 31 International
'91 350 LE MH; '21 Interstate 24GT
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12-04-2010, 06:47 AM
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#3
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Rivet Master
2017 30' Classic
Loretto
, Ontario
Join Date: Oct 2010
Posts: 507
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Quote:
Originally Posted by jdalrymple
I have used the Honda 3 kw units with no problem. The AC will start and run with no problem. The electric start EU3000IS is very quiet and the electric start is great, but it is HEAVY to handle.
Best Regards,
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Is your AC a 13,000 btu or 15,000?
I understand 3 kw units operate the 13,000 btu AC but not sure about the 15,000
Does anyone have the specs for the 15,000 btu AC units?
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12-04-2010, 06:58 AM
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#4
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Rivet Master
1997 30' Excella
1961 26' Overlander
1954 22' Flying Cloud
1981 28' Airstream 280
San Antonio
, Texas
Join Date: Jul 2009
Posts: 1,436
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To determine generator load: AMPS X VOLTS = WATTS
__________________
Bruce
WBCCI# 9259 AIR# 38927 TAC-TX 14
Stop Littering-Spay & Neuter-- Adopt From Rescue
No amount of time will erase the memory of a great dog.
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12-04-2010, 07:17 AM
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#5
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Rivet Master
1997 34' Limited
1970 27' Overlander
South of Atlanta
, Georgia
Join Date: Sep 2009
Posts: 1,709
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The amperage requirement for the above formula should be in your owners manual for the A/C unit.
__________________
Craig and Carol
1997 34' Excella 1000
1970 27' Overlander, International
2009 Ford F150 5.4L
ProPride hitch with 1400# bars
AIR 41028
TAC GA-8
WBCCI 10199
Past President Southeastern Camping Unit (12)
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12-04-2010, 07:43 AM
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#6
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Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
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Quote:
Originally Posted by bwoodtx
To determine generator load: AMPS X VOLTS = WATTS
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Unfortunately it's not that simple, as a compressor on a roof A/C unit will draw as much as 50 amps momentarily at start-up (surge). A 'typical' 15K roof air will draw, depending on the ambient temperature outside, between 13 and 20 amps running and 3-4 for the blower motor. The amp draw of the compressor changes with the ambient temperature. There is a formula to calculate this, and I can look it up for you if you need it.
If the ambient temps are in the 80's, you can expect between a 15-20 amp running load. If we use the 20 amp figure at 120VAC, you get 2400 watts of power draw. IIRC, the Honda 3000 will handle this easily. Be sure to have the ECO setting off when you start the A/C so it can handle the start-up surge.
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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12-04-2010, 07:47 AM
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#7
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Site Team
2002 25' Safari
Dewey
, Arizona
Join Date: Mar 2005
Posts: 15,617
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It is going to depend on the draw of the AC unit and the others draws in your trailer. Your converter will draw a few amps when you apply power to the trailer and your refrigerator may switch to shore power as well.
If your AC pulls 20 amps, you have 5 to spare for other devices.
3000 watts = 25 amps
__________________
Richard
Wally Byam Airstream Club 7513
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12-04-2010, 09:30 AM
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#8
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3 Rivet Member
2017 30' Classic
Montreal
, Quebec
Join Date: Jun 2009
Posts: 211
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I'm presently using a Honda 3000 inverter with the electric start. I have a 15k heat pump on my '10 30'. It works like a charm!
I leave the gen in economy mode and it adjusts automatically to the load.
I leave it in the bed of the pickup all season and I use storage tension bars to keep it from moving.
__________________
Ron
Montreal, QC
2017 Classic
4 Flexible 100w Solar Panels
3000w Magnum Hybrid Inverter
1000 Amp Hours Lithium Battery
Honda EU3000
Drain Master Sewer Connection
2017 GMC Denali 2500 Duramax
Hensley
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