Inverters islanding in L.A. [RE-wrenches]

[Pagan MacKay]

Hello All,

This is a public forum open to many more readers than the members of the 
list and I don’t think we want our comments to be turned into anyone’s 
political agenda. That said, I feel a comment regarding the recent posts 
about this issue is in order.

Here is a clear statement on the SW compliance and anti-islanding issue 
(already on our SW information web site since December). 
"Non compliant” inverters (ours or anyone else’s) should not be 
installed under any circumstances.  All SW series inverters manufactured 
since December 2001, when installed with the GTI accessory, comply with 
UL1741 and IEEE 929 and are listed by both UL and CSA to those 
standards.

We have even taken the additional step of stopping any installation that 
was in process as of December 2001 and upgrading the hardware. Many of 
you have participated in the WIP program designed to ensure homeowners 
who purchased grid tie systems were minimally effected by the UL alert. 
We've upgraded SWs, provided free GTIs, paid for all shipping charges 
and we have compensation available to dealers to defray the cost of 
taking out already installed equipment and replacing it.

Further, we have done extensive testing and supported significant 
investigation by utility companies to show that older SW series units 
already in service, while not compliant with latest standards, do not 
present a material safety hazard and may safely be left in service.  
This is the conclusion of the California owned utilities among others. 

The “PV” version of the SW was our first “batteryless” grid connected 
product in 1998 and 1999.  This product has not been offered since 1999 
and only a few hundred units were ever produced.  SMUD purchased most of 
these.  This product was listed to the draft standard of UL1741 which 
was not harmonized with IEEE 929 and had different voltage, frequency 
and time thresholds than the new standard which went into effect in 
November of 2000.

I hope this helps clarify...if I can provide further information please 
contact me.

Best,

Pagan

Pagan MacKay
Xantrex Technology Inc.
Distributed Power Markets
360-435-8826 ext. 4070
pagan.mackay at xantrex.com
www.xantrexREdealer.com

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