HI Richard, I'll chime in, although you won't like it.
Dump the system and start over with a new battery less system and a genny as back up. Told you, you wouldn't like it. The SW parts are basically gone and it was a terrible grid tied inverter anyway. The modules are usable but why at $1.5 watt keep them? Client doesn't want MX, so that means no batteries. You'll need a genny as back up anyway for long power outages during storms, so get a natural gas/propane unit as back up instead of batteries. OK you asked, jay peltz power On Nov 17, 2011, at 4:03 PM, Richard L Ratico wrote: > Hi Wrenches, > > This is a repost. No replies the first time, so I'm trying one last time. > > I may be "adopting" an eleven year old, Y2K, grid tie with battery back-up > system. It consists of 12 - Astro-Power 120 modules, installed in 2000, 12 - > Evergreen EC-110 modules installed in 2004, only one MX60, which controls > BOTH > sub-arrays, one SW4048 in SELL mode through a dedicated load sub-panel. > Existing, seven year old battery is shot (8-Trojan L-16). Initial bank of > unknown batteries was replaced after only four years. > > Recent long, nearby, utility outages have the client requesting a proposal to > include a new back-up generator and to restore the system selling to the grid. > Client may decide go straight grid tie to eliminate the batteries. They have > found the maintenance to be a hassle. > > My thoughts so far: > > 1)To take advantage of most of the existing hardware, I wonder if it makes > sense > to try to improve the system efficiency by relegating the SW to a manual > back-up > mode only, where, say, by means of a timer controlling grid availability > through > AC1, it would only charge a smaller battery bank once a week. The battery bank > would be small, > a single string of either, sealed gel units or T-105s with the new Trojan > watering system. > 2) Provide new grid-tie inverter/s (appropriate string type or Enphase 190s) > to > handle the net metering. > 3) Provide a way to AC couple the new inverter/s to the SW in the event of an > outage. > 4) Provide a new Honda 3000 inverter type generator connected to AC2 in the > SW. > 5)Provide a way to lockout the grid tie inverter/s when the generator is > operating. > > Any thoughts or suggestions would be greatly appreciated. > > Thanks in advance, > > Dick Ratico > Solarwind Electric > Bradford, VT > _______________________________________________ > Li _______________________________________________ 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
