[RE-wrenches] Interconnection with Generator
Jarmo.Venalainen at schneider-electric.com
Jarmo.Venalainen at schneider-electric.com
Tue Oct 28 16:35:00 PDT 2014
Hi:
Xantrex did some early work on generator with inverter compatibility back
in 2007. AC coupling PV to generators was very new back then and we
wanted to find the benefit of using a battery based inverter to reduce the
run time of generators. One system was a small 5kW off-grid house and the
second a 90kW generator running a couple of dozen homes. For the trial is
set up with power monitoring for back-feed and much more.
The systems are still running. Here are a few training slides which
summarize the results and a link to the archived study from 2007 at the
Natural Resources Canada.
http://www.nrcan.gc.ca/energy/publications/sciences-technology/renewable/solar-photovoltaic/6215
The bullet form summary is:
- The smaller the generator, the large the savings whether you grid tie to
the generator or use a battery based inverter to reduce generator run
time.
- PV is not needed to get the bulk of the savings in systems using battery
based inverters to reduce run time of small generators.
JARMO
On Oct 28, 2014 4:48 AM, "Corey Shalanski" <cshalanski at joule-energy.com>
wrote:
Wrenches,
We frequently encounter residences with backup generators. The question
that arises: how should the PV system be interconnected?
I have searched the archives and found some good information about this
subject, but nothing definitive. I have fallen into the habit of broadly
proclaiming that the PV system *must* be interconnected on the "utility"
side of the transfer switch - in order to prevent backfeeding into the
generator and thereby eliminate unintentional equipment damage. Is this
concern justified? If so, should this be an absolute rule or would it
depend on the generator make/model?
Thanks for any insights.
--
Corey Shalanski
Joule Energy
New Orleans, LA
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_____________________________________________________________________________________
Jarmo Venalainen | Schneider Electric | Solar Business | CANADA |
Training & Development Specialist - Senior
Phone: +604-422-2528 | Fax: +604-420-1591 | Mobile: +604-505-0291
Email: jarmo.venalainen at schneider-electric.com | Site: www.SEsolar.com
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