[RE-wrenches] Inverter Data

[Orion Thornton]

Thanks Matt,

 

It sounds like the information is a little irrelevant to current technology
in terms of safety and interfacing with the grid as it applies to
permitting.  Given the power quality and safety of grid-tie inverters it
would be beneficial for permitting agencies to move past these issues and on
to more relevant line items in their permit applications.  I believe this
will be the second grid-tie PV system on this particular utility, so the PV
permitting process is a little new to them.

 

Thanks again.

 

Orion Thornton

Independent Power Systems

 

 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Matt
Lafferty
Sent: Tuesday, April 21, 2009 12:12 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Inverter Data

 

Hi Orion,

 

 RE:  Can anyone help me to determine the commutation type and rated power
factor (%) for a Fronius 4000 IG.   

 

Line commutation. Basically, this means they sync with an existing grid
(line). Non-islanding inverters are line commutated.

 

PF = 100% (aka 1.0 PF) according to their spec sheet. Double-check your copy
to make sure your application matches the datasheet... Technically,
grid-tied inverters operate at Unity Power Factor, i.e. "the same PF the
grid is giving it". But "Unity" is not a number, percentage or otherwise. I
used to put it on applications back in the day, just to be ornery. 

 

Good luck!

 

Matt Lafferty

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