Yea, I told her the old SWs were really inefficient at sell back, and
she should just forget about net metering. However, apparently it is
has an almost 10 kW array, and they used to get surplus checks back from
the utility. This might be another reason why the utility doesn't want
to reconnect it. I'm going to look at it Thursday. I'm quite
comfortable dealing with the old SW inverters, I still have plenty of my
old systems cranking away, but this reconnection issue of a legacy
system is a new one on me.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 2/9/2016 1:05 PM, Jeremy Rodriguez wrote:
I would put it in Float mode and let it offset the grid.
I don't think it would actually sell unless you select that from the grid use
menu.
If it's the SW, that is.
Study the owners manual
Jeremy Rodriguez
Solar Installation And Design Expert
All Solar, Inc.
1463 M St
Penrose Colorado 81240
Sent by Jeremy's iPhone. Sorry for typos and shorthand!
On Feb 9, 2016, at 12:23 PM, Ray Walters <[email protected]> wrote:
Greetings Esteemed Wrenches;
I just received an interesting call from an owner of a late 1990s vintage GTB system here
in Colorado. (Trace SW4048 I'm guessing) The tenants had disconnected the grid for
almost 2 years and lived in the house off grid. They had also done many scary wiring
"upgrades" using speaker wire out of the main AC load center.
The tenants are gone, the AC load center was cleaned up, and the owner wants to
reconnect the GT system, but the utility is not allowing it since they were
disconnected for 2 years. I'm still trying to find out what the requirements
are, but I wanted to ping the list and see what experience anyone had, and what
requirements might be placed in this situation.
It seems to me that this system should be grand fathered in and not be required
to meet more than 1999 NEC, but I've never dealt with this scenario before.
Requiring this to meet 2014 NEC would be insane, and even meeting 2008 NEC
would be a deal killer, as the old SW inverters were not UL 1741 compliant.
(wasn't even around in 1998 I believe)
My plan was to inspect the entire system, retorque connections, perform any
necessary repairs, and just confirm compliance with NEC 1999. There would be
little point, if the utility or AHJ required compliance with a newer code
though.
Thanks as always for any assistance,
--
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
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