Hi Nathan Only other suggestion is to try a non Morningstar controller as a test.
But find it hard to believe 4 bad controllers. Good luck Jay Sent from my iPhone On Jul 17, 2012, at 8:26 AM, Nathan Jones <[email protected]> wrote: > > > 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: [email protected] >> >> 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: [email protected] > > 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: [email protected] 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
