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 > Ryobi 900 Watt Propane Generator

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MrWizard

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Posted: 03/07/19 10:47am Link  |  Quote  |  Print  |  Notify Moderator

TWZMYJP
I'm referring to overloading the generator


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time2roll

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Posted: 03/07/19 09:31pm Link  |  Quote  |  Print  |  Notify Moderator

vermilye wrote:

, but I can't find any sound pressure levels for loudness.

Thanks in advance...
Box on youtube says 61 dB.
Seems like a lot compared to Honda 1000 at 42 dB (1/4) to 50 dB (rated power).
I am losing interest.


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Posted: 03/07/19 10:25pm Link  |  Quote  |  Print  |  Notify Moderator

How can a 30 or 40 amp charger overload a 700 watt generator?


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Posted: 03/07/19 10:37pm Link  |  Quote  |  Print  |  Notify Moderator

40A x 14.4V is 576W. 576W at 0.8 power factor is 720 VA.





MrWizard

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Posted: 03/07/19 11:00pm Link  |  Quote  |  Print  |  Notify Moderator

and thats running, not power on surge although if 'Nothing' else is plugged in
900VA peak should handle the surge

regardless of lableing, when it comes to generators, "It Is VA" not watts

burningman

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Posted: 03/07/19 11:00pm Link  |  Quote  |  Print  |  Notify Moderator

And that’s absolute max.
Seems to me that thing should run it.

time2roll

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Posted: 03/08/19 08:39am Link  |  Quote  |  Print  |  Notify Moderator

DrewE wrote:

40A x 14.4V is 576W. 576W at 0.8 power factor is 720 VA.
/ .8 efficiency = 900VA

Xantrex white paper on power factor

DrewE

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Posted: 03/08/19 08:56am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

DrewE wrote:

40A x 14.4V is 576W. 576W at 0.8 power factor is 720 VA.
/ .8 efficiency = 900VA

Xantrex white paper on power factor


You're right...I forgot to include the efficiency along with the power factor. [emoticon] I blame it being too late at night to do math when I wrote that.

Xantrex's numbers in their white paper are probably a bit overstated, in as much as they seem to be comparing themselves at their very best to their poorest competitor at the competitor's very worse. 80% efficiency and 0.8 PF are fairly reasonable worst-case estimates for many modern converters, though. In practice, I would expect the 900W generator to be (barely) sufficient for a 30A or 35A converter, even with hungry batteries...and possibly a 40A or 45A converter in some installations.

Progressive Dynamics lists the power consumption of the PD9245 as 725W, and the input current at rated output as "approximately 8.3A". With the remote dongle, one could keep it from putting out the full rated power and probably get by through manual intervention.

pnichols

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Posted: 03/09/19 01:17am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

vermilye wrote:

, but I can't find any sound pressure levels for loudness.

Thanks in advance...
Box on youtube says 61 dB.
Seems like a lot compared to Honda 1000 at 42 dB (1/4) to 50 dB (rated power).
I am losing interest.


Hmmm ... right you are regarding Honda now publishing that as the latest noise spec on their EU1000i. I wonder how/when they came up with that as compared to the higher spec that they used to show for it?

As I recall, Honda didn't used to publish that low of a noise spec for their EU1000i. I also notice that Honda's published noise spec for their EU2200i is now showing lower than their previous EU2000i 53-59dB noise spec. [emoticon]

Did Honda recalibrate their engineering lab's dB meters ... or did they add (more) sound insulation to their generators' cabinet interiors? [emoticon]


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time2roll

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Posted: 03/09/19 03:32pm Link  |  Quote  |  Print  |  Notify Moderator

42-50 did seem low. Can you remind us what it was before?

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