Any disconnection of battery power to the inverter will lose the settings definitely have them written down & there are settings that are no appropriate for off grid and long battery life.
Dana Orzel - Great Solar Works, Inc - E - d...@solarwork.com - V 970.626.5253 F - 970.626.4140 C - 970.209.4076 web - www.solarwork.com "Responsible Technologies for Responsible People since 1988" P Please consider the environment before printing this email From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kent Osterberg Sent: Tuesday, May 15, 2012 8:29 PM To: glenn.b...@glbcc.com; RE-wrenches Subject: Re: [RE-wrenches] Battery changing on SW inverter Glenn, Righthand Engineering <http://www.righthandeng.com/hm_swca.htm> still makes the memory backup device you are thinking about. I recommend going though all the menus before you work on the system and writing down the settings. You may even find that there are some settings that are not appropriate. Keep a copy of how you left the the system programmed in case there are ever any questions or need to reprogram it again later. Kent Osterberg Blue Mountain Solar, Inc. www.bluemountainsolar.com On 5/15/2012 1:44 PM, Glenn Burt wrote: Hello wrenches, I am quoting a job to do a simple battery bank replacement on an existing system that has a Trace SW4048 inverter. I have not done any substantial work on these revered systems, but seem to remember that removing the batteries will lose all the custom program settings in the inverter. I seem to recall there was a product that could be purchased that used a 9V battery to hold up the setting memory while the main batteries were disconnected. Could anyone tell me the name of it? Or is there a better solution out there? I see a couple of products that claim to read/write the SW memory from Right Hand Engineering and Maui Solar Software - anyone used them or recommend against them? Thanks, Glenn Burt glb, Consulting Company NABCEP Certified Solar PV Installer TM NYSERDA Eligible Installer Microsoft Certified Professional
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