[RE-wrenches] Old Net Metering

[Tump]

There was a GTI box that essentially plugged into the "newer" SWs not sure whether that might satisfy your utility, if you could find one. Talk about inefficient..... ramp up, ramp down, ramp up, ramp down, adjusting the output current to the grid.
On Feb 9, 2016, at 4:34 PM, Ray Walters wrote:

> 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 <ray at solarray.com> 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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