Home » Public Forums » GMCnet » Dometic Inverter/Generator
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| Re: Dometic Inverter/Generator [message #195515 is a reply to message #195507] |
Mon, 14 January 2013 12:20   |
rcjordan
Messages: 1913
Registered: October 2012
Location: Elizabeth City, North Car...
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yamaha has one that will supposedly start the AC but it's 3x the price
Yamaha EF3000iSEB
SOLD 77 Royale Coachmen Side Dry Bath
76 Birchaven Coachmen Side Wet Bath
76 Eleganza
Elizabeth City, NC
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| Re: Dometic Inverter/Generator [message #195517 is a reply to message #195515] |
Mon, 14 January 2013 12:36 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
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My 3 kw inverter generator will not bring my new A/C on line. I would test the claim as soon as this one showed up, with the understanding if it will not run your A/C, it would be returned. No sense in being unhappy, if running the A/C is your main goal.
However, I have no trouble running the microwave, the frig, and most other 110 powered devices with my 3 kw inverter style generator. (Chinese copy of Honda 3 kw, not Dometic.)
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: Dometic Inverter/Generator [message #195521 is a reply to message #195517] |
Mon, 14 January 2013 13:25 |
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WD0AFQ
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
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| tphipps wrote on Mon, 14 January 2013 12:36 |
My 3 kw inverter generator will not bring my new A/C on line. I would test the claim as soon as this one showed up, with the understanding if it will not run your A/C, it would be returned. No sense in being unhappy, if running the A/C is your main goal.
However, I have no trouble running the microwave, the frig, and most other 110 powered devices with my 3 kw inverter style generator. (Chinese copy of Honda 3 kw, not Dometic.)
Tom, MS II
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Yep, what Tom said.
I picked up one of the first Kipors that showed up in the USA. I rarely use it anymore since we have the solar and on demand water heater. But, I like it and it works well. I throw it in when we head to Quartzsite just in case it rains for 2 weeks. Never happens so I never use it. That thing looks just like the Kipor but not yellow.
Dan
3 In Stainless Exhaust Headers
One Ton All Discs/Reaction Arm
355 FD/Quad Bag/Alum Radiator Manny Tran/New eng.
Holley EFI/10 Tire Air Monitoring System
Solarized Coach/Upgraded Windows
Satelite TV/On Demand Hot Water/3Way Refer
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| Re: Dometic Inverter/Generator [message #195531 is a reply to message #195515] |
Mon, 14 January 2013 14:53 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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| rcjordan wrote on Mon, 14 January 2013 11:20 |
yamaha has one that will supposedly start the AC but it's 3x the price
Yamaha EF3000iSEB
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So paralleling 2 would still put you money ahead.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: Dometic Inverter/Generator [message #195534 is a reply to message #195531] |
Mon, 14 January 2013 15:17 |
rcjordan
Messages: 1913
Registered: October 2012
Location: Elizabeth City, North Car...
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>So paralleling 2 would still put you money ahead.
That's what I was thinking, too.
I've not heard one of these 'quiet' inverter/gens yet but don't they run at high rpms (as compared to the Onan)?? I ask because I hate to hear engines wound up tight. I feel like they're beating themselves to death.
SOLD 77 Royale Coachmen Side Dry Bath
76 Birchaven Coachmen Side Wet Bath
76 Eleganza
Elizabeth City, NC
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| Re: Dometic Inverter/Generator [message #195553 is a reply to message #195549] |
Mon, 14 January 2013 17:59 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Most, if not all inverters run at 3,600 rpm. Engine speed is related to the need for 60 cycles. Actually, I'm thinking all the modern gas generators run at 3600 rpm.
Onan runs at 1800 and with its greater metal mass is quiet for its era.
Inverters are very quiet, even under load, and are generally well insulated for noise control.
My 3 kw is a Kipor, and I am well pleased with. It was purchased for hurricane support, not to power the GMC. But, other than the A/C, can be used for power in the GMC.
Tom, KA4CSG. Six hurricanes down and more to come.
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: Dometic Inverter/Generator [message #195581 is a reply to message #195553] |
Tue, 15 January 2013 05:45 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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| tphipps wrote on Mon, 14 January 2013 15:59 |
Most, if not all inverters run at 3,600 rpm. Engine speed is related to the need for 60 cycles. ...
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That statement doesn't match how I understood them. (It DOES match how a NON-INVERTER Generator works.)
A quick search finds this:
<http://wiki.answers.com/Q/Difference_between_an_inverter_generator_and_a_generator>
| Quote: |
An inverter generator typically has an engine that can be run at variable speed depending upon the load. The engine is connected to an efficient alternator whose output is converted to DC by a rectifier and smoothed somewhat by capacitors. This raw DC power is then inverted into smooth AC power of the proper frequency and voltage for the output (for example 110-120VAC 60HZ or 220-240VAC 50 or 60 HZ). Regulation is very good and the system will use less fuel if the load is small or variable since the control system will allow the engine to idle down when the load is small or throttle up when the load is large.
A standard "generator" or "genset" is an engine connected to an alternator and run at a speed that is some multiple of the desired AC frequency, regardless of the load on it (as the load increases the throttle opens more to keep the engine speed the same). The output of the alternator is connected directly to the load. Typical speeds are 1800 or 3600 rpm in the USA for 60HZ power when using a 4-pole or 2-pole alternator respectively. The engine speed control can be as simple as the mechanical feedback governor system used for any constant-speed engine.
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Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: Dometic Inverter/Generator [message #195582 is a reply to message #195581] |
Tue, 15 January 2013 05:54 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
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I have a 2k Honda Inverter generator. <http://powerequipment.honda.com/generators/models/eu2000i>
It is more expensive than other brands of the same output/features, but from the reviews, it seems to be quieter for the same output and is more reliable.
If I had to remove my Onan, I would think of using the space to carry a 3k version. I would have to remove it to use it, but it IS a good generator.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: [GMCnet] Dometic Inverter/Generator [message #195587 is a reply to message #195582] |
Tue, 15 January 2013 06:30 |
Jim Bounds
Messages: 842
Registered: January 2004
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The EU3000 Honda would need to be modified to fir in the hole hright wise. I agree that the 2000 Hoda is a really good unit, it will do much more than the other units similar but one of them will not run a roof AC larger than 8500 BTU. I have installed 2 of them in parallel which will run a roof unit. 2 will fit in a 26' generator compartment but not in a 23' which is what we're working on next.
The Yamaha 3000 watt unit will fit (I think), that's where we are right now. The Yamaha is also getting good reviews-- have not gone further at this point. Stay tuned, we're working this project now...
Jim Bounds
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________________________________
From: Mike Miller <m000035@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Tuesday, January 15, 2013 6:54 AM
Subject: Re: [GMCnet] Dometic Inverter/Generator
I have a 2k Honda Inverter generator. <http://powerequipment.honda.com/generators/models/eu2000i>
It is more expensive than other brands of the same output/features, but from the reviews, it seems to be quieter for the same output and is more reliable.
If I had to remove my Onan, I would think of using the space to carry a 3k version. I would have to remove it to use it, but it IS a good generator.
--
Mike Miller -- Hillsboro, OR -- on the Black list
(#1)'73 26' exPainted D. -- (#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
http://m000035.blogspot.com
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| Re: [GMCnet] Dometic Inverter/Generator [message #195654 is a reply to message #195553] |
Wed, 16 January 2013 07:10 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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In an inverter system, 60Hz is determined in the inverter. The generator output is rectified, the inverter is fed DC. This is the value of an inverter system - the engine can run at a speed equal to the load. In an AC generator (correctly called an alternator) frequency is determined by alternator speed and the number of poles. Thus two - pole genset will run at 3600 RPM, while a 4 pole will run at 1800. Most small sets are two pole, the exceptions being the older Onans and the older Kohlers (that I am aware of, there may be ohers) . Virtually all diesel sets are 4 pole and run 1800 RPM. Some of the really big stuff (EMD and the like) run 900 RPM and use an 8 pole alternator.
Just to make this more confusing, the Onan newer vertical shaft sets use a belt driven alternator, and the engine runs 2400 RPM with the pulley size differential bneing used to get the alternator to the proper speed. The early 3.6 Generac RV set actualy produces something along the lines of 535Hz in multiple windings, but by judicious switching of the windings in and out of the circuit, the output is maintained between 55 and 65Hz.
--johnny
'76 23' transmode norris
'76 palm beach
From: Thomas Phipps <tph1pp5@yahoo.com>
To: gmclist@temp.gmcnet.org
Sent: Monday, January 14, 2013 6:59 PM
Subject: Re: [GMCnet] Dometic Inverter/Generator
Most, if not all inverters run at 3,600 rpm. Engine speed is related to the need for 60 cycles. Actually, I'm thinking all the modern gas generators run at 3600 rpm.
Onan runs at 1800 and with its greater metal mass is quiet for its era.
Inverters are very quiet, even under load, and are generally well insulated for noise control.
My 3 kw is a Kipor, and I am well pleased with. It was purchased for hurricane support, not to power the GMC. But, other than the A/C, can be used for power in the GMC.
Tom, KA4CSG. Six hurricanes down and more to come.
--
1975 GMC Avion, under forever re-construction
Vicksburg, MS. 3.7 miles from I-20
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Dometic Inverter/Generator [message #195738 is a reply to message #195654] |
Thu, 17 January 2013 06:35 |
Jim Bounds
Messages: 842
Registered: January 2004
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Can't remember if I posted this but I ordered in one of the Dometic units, I'm a sucker for believing specs., if it really will do what it says we've done some measuring and it will fit into a 23' generator compartment! This generator issue is top row center for me right now. Not only am I working on a 23' for myself but we have another 23' in house that may want to consider the option plus a 26' in here in the same situation.
In the past I have found inverter styled generators really did not like a heavy load thrown at them, the Chinese ones would hold the load but it was sketchy wether they would hold on startup of a roof AC for instance. A strong 2600 watts continuous should do the job. One thing I didn;t see an elaborate conversation about was the noise level of the critter-- we will see... Hey, I'll jump out there and BTW, if this works they will sell for the same $799 which is a super buy for sure. I'll keep you in the loop
Jim Bounds
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________________________________
From: Johnny Bridges <jhbridges@ymail.com>
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Sent: Wednesday, January 16, 2013 8:10 AM
Subject: Re: [GMCnet] Dometic Inverter/Generator
In an inverter system, 60Hz is determined in the inverter. The generator output is rectified, the inverter is fed DC. This is the value of an inverter system - the engine can run at a speed equal to the load. In an AC generator (correctly called an alternator) frequency is determined by alternator speed and the number of poles. Thus two - pole genset will run at 3600 RPM, while a 4 pole will run at 1800. Most small sets are two pole, the exceptions being the older Onans and the older Kohlers (that I am aware of, there may be ohers) . Virtually all diesel sets are 4 pole and run 1800 RPM. Some of the really big stuff (EMD and the like) run 900 RPM and use an 8 pole alternator.
Just to make this more confusing, the Onan newer vertical shaft sets use a belt driven alternator, and the engine runs 2400 RPM with the pulley size differential bneing used to get the alternator to the proper speed. The early 3.6 Generac RV set actualy produces something along the lines of 535Hz in multiple windings, but by judicious switching of the windings in and out of the circuit, the output is maintained between 55 and 65Hz.
--johnny
'76 23' transmode norris
'76 palm beach
From: Thomas Phipps <tph1pp5@yahoo.com>
To: gmclist@temp.gmcnet.org
Sent: Monday, January 14, 2013 6:59 PM
Subject: Re: [GMCnet] Dometic Inverter/Generator
Most, if not all inverters run at 3,600 rpm. Engine speed is related to the need for 60 cycles. Actually, I'm thinking all the modern gas generators run at 3600 rpm.
Onan runs at 1800 and with its greater metal mass is quiet for its era.
Inverters are very quiet, even under load, and are generally well insulated for noise control.
My 3 kw is a Kipor, and I am well pleased with. It was purchased for hurricane support, not to power the GMC. But, other than the A/C, can be used for power in the GMC.
Tom, KA4CSG. Six hurricanes down and more to come.
--
1975 GMC Avion, under forever re-construction
Vicksburg, MS. 3.7 miles from I-20
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| Re: [GMCnet] Dometic Inverter/Generator [message #195741 is a reply to message #195738] |
Thu, 17 January 2013 07:09 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Jim, the surge rating on an inverter set has to consider the current the switching devices can handle as well as the stored energy in the spinning engine/generator system. On a synchronous (60Hz alternator) system, the surge capacity is essentially the spinning components... the surge heats the windings but normally won't hurt for the short period of time they're carrying the starting current. I'll be very interested in what you fiond out. I don't see the Junkerac surviving a lot longer - though I'll be pkleased to be proved wrong on that front.
--johnny
'76 23' transmode norris
'76 palm beach
From: Jim Bounds <gmccoop@yahoo.com>
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Sent: Thursday, January 17, 2013 7:35 AM
Subject: Re: [GMCnet] Dometic Inverter/Generator
Can't remember if I posted this but I ordered in one of the Dometic units, I'm a sucker for believing specs., if it really will do what it says we've done some measuring and it will fit into a 23' generator compartment! This generator issue is top row center for me right now. Not only am I working on a 23' for myself but we have another 23' in house that may want to consider the option plus a 26' in here in the same situation.
In the past I have found inverter styled generators really did not like a heavy load thrown at them, the Chinese ones would hold the load but it was sketchy wether they would hold on startup of a roof AC for instance. A strong 2600 watts continuous should do the job. One thing I didn;t see an elaborate conversation about was the noise level of the critter-- we will see... Hey, I'll jump out there and BTW, if this works they will sell for the same $799 which is a super buy for sure. I'll keep you in the loop
Jim Bounds
------------------------
________________________________
From: Johnny Bridges <jhbridges@ymail.com>
n an inverter system, 60Hz is determined in the inverter. The generator output is rectified, the inverter is fed DC. This is the value of an inverter system - the engine can run at a speed equal to the load. In an AC generator (correctly called an alternator) frequency is determined by alternator speed and the number of poles. Thus two - pole genset will run at 3600 RPM, while a 4 pole will run at 1800. Most small sets are two pole, the exceptions being the older Onans and the older Kohlers (that I am aware of, there may be ohers) . Virtually all diesel sets are 4 pole and run 1800 RPM. Some of the really big stuff (EMD and the like) run 900 RPM and use an 8 pole alternator.
Just to make this more confusing, the Onan newer vertical shaft sets use a belt driven alternator, and the engine runs 2400 RPM with the pulley size differential bneing used to get the alternator to the proper speed. The early 3.6 Generac RV set actualy produces something along the lines of 535Hz in multiple windings, but by judicious switching of the windings in and out of the circuit, the output is maintained between 55 and 65Hz.
--johnny
'76 23' transmode norris
'76 palm beach
From: Thomas Phipps <tph1pp5@yahoo.com>
Most, if not all inverters run at 3,600 rpm. Engine speed is related to the need for 60 cycles. Actually, I'm thinking all the modern gas generators run at 3600 rpm.
Onan runs at 1800 and with its greater metal mass is quiet for its era.
Inverters are very quiet, even under load, and are generally well insulated for noise control.
My 3 kw is a Kipor, and I am well pleased with. It was purchased for hurricane support, not to power the GMC. But, other than the A/C, can be used for power in the GMC.
Tom, KA4CSG. Six hurricanes down and more to come.
--
1975 GMC Avion, under forever re-construction
Vicksburg, MS. 3.7 miles from I-20
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Dometic Inverter/Generator [message #195754 is a reply to message #195741] |
Thu, 17 January 2013 09:53 |
rcjordan
Messages: 1913
Registered: October 2012
Location: Elizabeth City, North Car...
Karma: 1
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Senior Member |
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For reference, the dimensions of the Dometic:
Dimensions: 23.8" Long X 14.5" Wide X 21.5" High
Also, the weight is listed elsewhere at 79 lbs (59 shown on the linked page)
Fuel capacity: 1.8 gal.
SOLD 77 Royale Coachmen Side Dry Bath
76 Birchaven Coachmen Side Wet Bath
76 Eleganza
Elizabeth City, NC
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| Re: Dometic Inverter/Generator [message #195784 is a reply to message #195782] |
Thu, 17 January 2013 14:59 |
rcjordan
Messages: 1913
Registered: October 2012
Location: Elizabeth City, North Car...
Karma: 1
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Senior Member |
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>exhaust system
I've discussed this some with JimB. From what I gather, he thinks this is a good candidate to go in the gen drawer with the possible exception of not being able to use the main fuel tanks. I'm fairly sure -but have not specifically asked- that some sort of nice exhaust can be worked out.
At any rate, give us until the end of next week and we'll know more about customizing this unit.
SOLD 77 Royale Coachmen Side Dry Bath
76 Birchaven Coachmen Side Wet Bath
76 Eleganza
Elizabeth City, NC
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| Re: [GMCnet] Dometic Inverter/Generator [message #195827 is a reply to message #195587] |
Thu, 17 January 2013 21:00 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Jim.
Too bad you didn't mention that to me the other day at Lazy Days so I could
show you my TroyBilt installation. It really did work out very well.
Aside from it being, perhaps, slightly louder than the 4kW it replaced,
it's really been a very satisfactory solution. A $600+ electric start
5.5kW unit from Lowes. It starts easily, runs reliably, and its speed
change when picking up the 13,500 btu A/C is barely noticeable.
http://www.gmcmhphotos.com/photos/g5330-troybilt-generator-installation.html
Ken H.
On Tue, Jan 15, 2013 at 7:30 AM, Jim Bounds wrote:
> The EU3000 Honda would need to be modified to fir in the hole hrightwise. I agree that the 2000 Hoda is a really good unit, it will do much
> more than the other units similar but one of them will not run a roof AC
> larger than 8500 BTU. I have installed 2 of them in parallel which will
> run a roof unit. 2 will fit in a 26' generator compartment but not in a
> 23' which is what we're working on next.
>
> The Yamaha 3000 watt unit will fit (I think), that's where we are right
> now. The Yamaha is also getting good reviews-- have not gone further at
> this point. Stay tuned, we're working this project now...
>
> Jim Bounds
> -------------------------
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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