Hi Joel - Have you tried getting PG&E out to check the line voltages? I believe they need to be +/- 5% steady state (ANSI Range A) or possibly +/- 10% (Range B) or they need to fix it. 105 V is way too low.
Here in the Bay Area I have found that PG&E is very receptive to resolving line voltage issues. They normally have a tech out to the site within a few hours after making a service call... Best, August -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Joel Davidson Sent: Sunday, December 19, 2010 9:25 AM To: RE-wrenches Subject: [RE-wrenches] Low grid voltage fix 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 _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
