Jay, CC to battery is about 30 inches and is #10THHN. Battery cabling is 4/0 with same length to inverter. Battery voltage is uniform. The installation of the AGM jumper on the controller seems to say it is not a battery issue and Trojan tech support concurs. Morningstar tech is in the same place as I am. No idea. Hard to believe we have 4 of their controllers over several months with the same gremlin. Battery connections are tight with the inverter pulling around 160 amps DC for its duty function which is about 3 minutes in duration. Nathan Jones
------------------------------ On Tue, Jul 17, 2012 10:14 AM CDT jay peltz wrote: >HI Nathan, > >Thats a good one. >what is the wiring like between the controller and the battery? > >you are measuring the 15.6 at the CC? > >each battery is same voltage while charging? > >you have checked all battery cable connections? > >jay > >peltz power > > > > > >On Jul 17, 2012, at 7:34 AM, Nathan Jones wrote: > >> >> Wrenches, >> This is baffling me and I need others experience. It is a small stand alone >> system with 4 L16s in series/parallel. Charging source is 2 Kyocera 140 watt >> modules. It is powering a satellite receiver as well as providing 120 VAC >> for a boat dock using a listed 3000 watt mod sine inverter. The inverter >> operating range is 10.5-15VDC. The Morningstar controllers are running the >> voltage up to 15.6 in bulk and float. >> At first it had two 10 amp controllers and I wondered if there could be a >> PWM situation existing. Swapping for a Morningstar SS20L gave exactly the >> same voltages. I replaced that controller with a MorningstarSL20 with no >> change in voltages to the batteries. I have used two meters as well as had >> the inverter tone the high voltage condition. I can shut off the solar input >> and get the batteries below 15 volts in a few seconds and bring the inverter >> online. I have repeatedly pulled surface charge off the batteries and >> watched the same voltages repeat themselves. I wondered about RF noise from >> the satellite feed messing with the PWM but unhooking it from the load side >> of the controller changed nothing. Batteries are gassing but not boiling out >> with no indication of a bad cell. In desperation I installed the spade >> jumper to switch the controller over to AGM settings and immediately saw the >> bulk and float voltages fall to the settings Morningstar lists in their >> manual. >> It was 100 degrees when I was onsite last week so this is not a cold weather >> situation. Anyone have any thoughts as to what is going on here? I am 140 >> miles from the site and this will be my third trip to sort this situation >> out. >> Thanks, >> Nathan Jones >> Power Source Solar >> Springfield, MO >> 417-827-0738 >> __ >_______________________________________________ >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
