[RE-wrenches] grid-tie inverters & generators

[Kelly Keilwitz, Whidbey Sun & Wind]

Wrenches,
I'm dredging up this subject again (previous postings 6/08) with a simple
question that doesn't seem to have been answered:

Is there any issue connecting a batteryless grid-tie PV system to the load
side of a panel that is backed-up by a generator on an automatic transfer
switch, when the grid is down and the generator running?

In this case the PV is 5.7kW, the inverter an SMA 6000, the generator
unknown size/type, but propane, automatic start, and backing up the entire
main panel.

SMA tech support first said it's OK, then that the generator will blow up. I
can imagine, if the inverter tries to sync with the inverter, that the
voltage could rise, causing the inverter to disconnect, wait 5 minutes,
repeat. Is there anything nasty that could happen?

Thanks,
-Kelly


Kelly Keilwitz, P.E.
Whidbey Sun & Wind, LLC
Renewable Energy Systems
NABCEP Certified PV Installer
987 Wanamaker Rd, 
Coupeville, WA 98239
PH & FAX 360-678-7131
sunwind at whidbeysunwind.com
 



 


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