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#211026 - 09/05/13 02:19 AM Multiple Grid Tie Inverters  
AllClear  Offline
Member
Joined: Aug 2005
Posts: 44
Belmond Iowa US
I've been kicking around PV for my farm.
But after watching YouTube videos of guys with Multiple eBay Chinese special grid tie inverters, I couldn't help wondering if you had two of them going at the same time when the grid went down if they wouldn't keep each other going and possibly make a fatality out of a lineman?? They are supposed to shut off output power when they sense grid loss.
It Seems like something that should be addressed somehow.


It's Not The Fall That Kills You...
It's That Sudden Stop At The End

Green Building & Alternative Energy Related:

#211029 - 09/05/13 04:03 AM Re: Multiple Grid Tie Inverters [Re: AllClear]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,057
Estero,Fl,usa
I think they are smart enough to see the grid drop. Scott may be better to guess at this but I think they actually trigger on the rising grid voltage above zero and kick in a few hundred microseconds after that. With no grid, none of them would trigger.

The open question might be if a small battery inverter would trigger them but you would still have to isolate that from the grid with a transfer switch.


Greg Fretwell

#211030 - 09/05/13 07:55 AM Re: Multiple Grid Tie Inverters [Re: AllClear]  
shortcircuit  Offline
Member
Joined: Jun 2004
Posts: 608
massachusetts
UL-1741 listed Grid Tied Inverters have to shut down upon loss of power from the grid. I don't know what type of black market junk is selling on ebay...but any legitimate company installing PV systems with the proper inspections won't be buying equipment on ebay...



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