Capt.Storm
Brockport NY.
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Joined: 04/18/2010
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Lets see...120 into 5kw=41.7 amps...40 is close enough...inverter inefficiency.
If you have 2 duplexes that would be 20 per.
Is that not ok?
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pianotuna
Regina, SK, Canada
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Joined: 12/18/2004
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Hi,
Looks like I'll be pulling out the 5000 watter. It runs the microwave (1591 watts) just fine--but it immediately faults on the air conditioner (960 watts) . I really don't understand why. It is supposed to do a surge for 1 second of 15000 watts. It runs the heat strip just fine, so this is not a watts issue but more probably a surge issue.
It displays 59.5 hertz with an idle voltage of 111.
With the Cobra the idle voltage is higher but the hertz are 15. The Cobra seems to run the air conditioner with ease--but simply sometimes shuts down when I try to run the microwave.
* This post was
edited 09/09/10 07:02pm by pianotuna *
Regards, Don
Kustom Koach Class C 28'5" 256 watts solar, 875 amp hours in two battery banks 12 volt batteries 2500 watt inverter.
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mena661
Southern California
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That sucks!!! Are you returning it?
2006 Ford F250 Lariat 6.0 PSD 2WD
2010 Keystone Outback Super-Lite 285FL 5er, Reese Signature Series 18K w/Manual Slider
Four Trojan L16 6V's (740Ah)
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Capt.Storm
Brockport NY.
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Mr.Pianotuna,
Was everything else off when you tried the air including the charger?
Can you turn the A/C fan on before the compressor?
Seems it should run it.
How is the inverter wired to the A/C?
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smkettner
Southern California
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pianotuna wrote:Ah yes...but yours is pure sine is it not? On the other hand my microwave is a *hog* at 1591 watts. And you would often brag on how well the Cobra would do since it was rated for MW & motors. Sounds a little like backpeddling to me.
Just saying.
2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675 watts solar
Send a PM if I missed something
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smkettner
Southern California
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pianotuna wrote:Hi,
Looks like I'll be pulling out the 5000 watter. It runs the microwave (1591 watts) just fine--but it immediately faults on the air conditioner (960 watts) . I really don't understand why. It is supposed to do a surge for 1 second of 15000 watts. It runs the heat strip just fine, so this is not a watts issue but more probably a surge issue.
It displays 59.5 hertz with an idle voltage of 109.
With the Cobra the idle voltage is higher but the hertz are 15. The Cobra seems to run the air conditioner with ease--but simply sometimes shuts down when I try to run the microwave.
How big is the 12v connection?
My Prosine1800 says 250MCM recommended, 4/0 minimum or surge performance is limited.
How certain are you that each outlet is not limited to something less than 5000w?
Note in the ebay pics they show max load as 1800w.
I would suggest an inverter made to be hardwired.
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pianotuna
Regina, SK, Canada
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Hi smkettner,
Yup *red faced grin*.
Here is what happened with the Cobra 2500 watt. About once in ten times the microwave would simply shut down the inverter for about 2 seconds. It wasn't much of an issue as I rarely use the microwave. But...I thought a pure sine wave unit would be "better" for all the motors in the RV. The new inverter runs everything but the air conditioner. Weird is all I can say.
smkettner wrote:pianotuna wrote:Ah yes...but yours is pure sine is it not? On the other hand my microwave is a *hog* at 1591 watts. And you would often brag on how well the Cobra would do since it was rated for MW & motors. Sounds a little like backpeddling to me.
Just saying.
* This post was
edited 09/09/10 07:10pm by pianotuna *
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pianotuna
Regina, SK, Canada
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Hi Storm,
Yes, I turned everything else off. I also tried spinning up the fan on the air conditioner.
Capt.Storm wrote:Mr.Pianotuna,
Was everything else off when you tried the air including the charger?
Can you turn the A/C fan on before the compressor?
Seems it should run it.
How is the inverter wired to the A/C?
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Capt.Storm
Brockport NY.
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I think you said it has two duplexes?
You might be getting only 20 amps to the air...but at that even..it should run it.
I can run mine off of 15 if nothing else is on when I'm plugged into my garage.
I'm still not sure how you have it wired.
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pianotuna
Regina, SK, Canada
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Hi Storm,
The outlets are "cross wired" so yes each outlet can, in theory, provide the entire output of the inverter.
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