Ken:
I guess I'm overly optimistic in hoping that electrical engineers could
understand these concepts. Next time I'm sending in a modified drawing
without the genset.
William
At 04:47 AM 3/26/2009, you wrote:
Morning William,
As for 2, from our experience with the local IOU, be careful when
mentioning a motor-driven generator. They don't understand that the XW
can't sell that power--directly-- to the grid. Since the cat is out of the
bag, I think you'll need to show that the gen set only charges the battery
and passes thru the XW to the dedicated loads.
May be simpler not to mention generator?
Ken
----- Original Message -----
From: <mailto:[email protected]>William Miller
To: <mailto:[email protected]>RE-wrenches
Sent: Thursday, March 26, 2009 2:12 AM
Subject: Re: [RE-wrenches] Battery based grid tie question.
Colleagues:
Interesting that this topic comes up at this time:
1. We inherited a grid-tie project wherein an elderly client was sold an
SW installation some years ago. Come to find out, the installer never
filed anything with the utility. The client was caught recently
back-feeding without permission by a meter reader and told to cease and
desist. We filed an application with the utility thinking this was a long
shot since the client's SW inverter did not have the requisite Grid-tie
Interface (GTI). We have several GTIs sitting on the shelf, but the
inverter does not have the proper interface so one could not be
installed. Lo and behold, the utility approved this installation for
interconnection.
2. We have an application to the local utility (PG&E) pending for a three
XW installation with a motor-generator. We have received multiple
communications from PG&E doubting the acceptability of the XW system for
use as a gird-tied battery-back up system. We are hoping that PG&E
accepts the listings from the various agencies and approves the project.
Interesting that the old, non-complaint system receives swift approval but
the latest and greatest gear hits a regulatory road block! We'll keep you
posted.
William Miller
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