Dan,
Thank you for the quick reply. I have been using the 108 VAC default setting
since 1998. I'll try 95 VAC.
It is interesting to hear other wrenches comment on utility low and high
voltage. Power factor control is another challenge for some utility companies.
On the other hand, they hold the RE industry to very tight power quality
standards. I have tried to get Los Angeles Department of Water & Power (LADWP)
and Southern California Edison (SCE) to keep their voltage within spec and
improve their power factor. Their responses are similar to asking City Hall to
fix potholes in the road. Sometimes they do. Sometimes they don't get a round
tuit for a while. SCE power is generally ok except in old neighborhoods with
wires and transformers over 40 years old. Forget about LADWP. They are off on
another planet. The smaller municipal utilities in southern California are
pretty good at managing power quality. Fortunately, today's inverters can be
adjusted manually. Perhaps some day inverters and loads will self-compensate
for less than stellar grid power quality.
Happy Holidays!
Joel Davidson
----- Original Message -----
From: d...@foxfire-energy.com
To: RE-wrenches
Sent: Sunday, December 19, 2010 2:54 PM
Subject: Re: [RE-wrenches] Low grid voltage fix
Try menu 11.. Ac input.
Dan Brown
Foxfire Energy Corp.
Renewable Energy Systems
(802)-483-2564
www.Foxfire-Energy.com
NABCEP #092907-44
-------- Original Message --------
Subject: [RE-wrenches] Low grid voltage fix
From: "Joel Davidson" <joel.david...@sbcglobal.net>
Date: Sun, December 19, 2010 12:24 pm
To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org>
Wrenches,
It's Christmas time again in Southern California Edison (SCE) territory
which means low insolation and high regional electric consumption. Every
night SCE voltage drops to around 105 VAC or lower. Our grid-tie SW4048
inverter sees SCE's low voltage as a brownout and switches to autonomous
mode which is normal. However, we have only 4 kWh of battery storage so the
combination of nightly brownouts and a series of cloudy days eventually
depletes our battery bank causing the inverter to do a low-voltage shut
down
which is normal. Power goes off in our home and we have to switch over to
SCE power, reset the inverter, and wait until the battery bank is
recharged.
How do we set the SW4048 to accept as low as 100 VAC from the grid before
switching to autonomous mode?
Joel Davidson
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