XW "sell" mode programming issue [RE-wrenches]

[Ken Schaal]

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Thanks Dan
 That's a little 'trick of the trade' that separates DIY from the Pros.
Needing to be reset to sell after DC off  can be a good thing, since most 
meters will allow sell back, but may charge the customer for the privilege !
Now that's something that will give PV a bad name real quick----------

By the way, be sure to verify that 'grid reconnect after outage,with 
generator running', will happen without inverter shutdown. May require a 
software upgrade.

Ken
CommonWealth Solar
Virginia


----- Original Message ----- 
From: "Dan Rice" <danrice at scinternet.net>
To: <RE-wrenches at topica.com>
Sent: Tuesday, April 29, 2008 12:32 AM
Subject: XW "sell" mode programming issue [RE-wrenches]


>
> Wrenches,
>
> I've come across an issue with the XW 6048 operating in Sell mode when
> connected to the grid. For those who haven't worked with the XW in a
> grid-tie system yet, there are a couple of program settings that must be
> "enabled" to get the inverter to sell. In order to program the inverter, a
> System Control Panel must be connected to the inverter. In the main Setup
> menu, Grid Support must be set to Enabled. In the Advanced Settings menu,
> the "Sell" setting must also be set to Enable. Simple enough. One of the
> purported advantages of the XW with the System Control Panel is supposed 
> to
> be that, once programmed, the inverter holds all settings, and the 
> installer
> can remove the SCP, preventing the system owner from tampering with 
> settings
> and messing things up (like an Outback FX with a Mate).
>
> Here's the rub -when the inverter is completely powered off (all AC and DC
> removed), the "Sell" setting in the Advanced Settings menu ALWAYS comes up
> to the default "Disabled" setting when the inverter is powered back on.
> Shades of the SW's volatile memory. Any grid-tie XW installers should take
> note, since inverters get powered off by customers from time to time. If
> your system owner has an SCP, you can teach them to reprogram the Sell
> setting, but if you choose to install a grid-tied (sell-back) system and
> omit the SCP, you're in for a service call if the customer powers off the
> inverter some time. (I'd be interested to know if the G series Outback FX
> inverters behave similarly -is this a UL-IEEE issue of some sort?)
>
> I spoke to a Xantrex tech support assistant about this, and mentioned that
> this issue would be posted here. I got a message back mentioning that Mark
> will reply to this with Xantrex' explanation (something having to do with
> there being a chance that if DC power has been removed from the inverter,
> that could indicate that the inverter has been moved to a new location 
> that
> doesen't have an interconnection agreement with the utility!?? I hope I 
> got
> that wrong). In Xantrex's favor, the techs I've spoken to about the XW 
> have
> had live XW systems at their finger tips, and have been able to verify
> problems or walk through menus using an actual SCP, not just a manual. 
> Good
> support there.
>
> Caveat extorqueo.
>
> Dan Rice
> Abundant Sun, LLC.
>
>
> Mark, BTW, it sounds like there are a number of reasons to retain the 12V
> generator run signal option on the GSM. Does the software upgrade to the 
> GSM
> adds the AC2 In Good recognition without eliminating the 12 V generator 
> run
> signal option? Either-or (and both) would be good programming options -the
> more flexibility, the better.
>
>
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>
> 


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