HI Mac, This is a pretty common event.
Yes the CC is dumping its caps into the load as the load is in a sense overloading the batteries. IE they are not able to deliver the amps and so the CC is helping. A larger breaker might help, or one technique I’ve used before ( advice from midnight) is to put a longer output cable on the CC. Slows the pixies down so you are less apt to dump the capacitors. However you don’t mention the battery size or age. I would suspect that you are starting to have some battery issues as thats the only time events like this occur. With this new larger load either the battery bank is too small and therefor struggling to supply current, and/or the age of the batteries is causing a reduction in current or you have one/few bad cells that are not normally seen except in conditions like this, or you have a bad connection in/to/on the battery bank or some combo. jay > On Dec 6, 2017, at 4:18 AM, Mac Lewis <maclew...@gmail.com> wrote: > > Hello wrenches, > > I've got a mysterious breaker tripping that I need some ideas on how to fix. > > Original system: > Array 6 x 235W Kyocera modules > 1 x Outback FM60 charge controller > 1 x Magnum MS 4024 PAE inverter > > Upgraded system we stacked a second inverter to accommodate an air > compressor: > Array 6 x 235W Kyocera modules > 1 x Outback FM60 charge controller > *2 x Magnum MS 4024 PAE inverter* > > There have been no changes to the solar array, just to the inverter side of > the system. We have been getting intermittent breaker tripping (a couple > of weeks between) on the battery breaker side of the charge controller. > The basics have been checked and rechecked. Torque is good on all sides of > the breaker all the way to the battery bussing. > > The only thing that I can think of is that during a surge on the AC side > its sucking enough current out of the charge controller caps to trip this > breaker occasionally. > > Has anyone experienced this? The only way I can see to fix it is to go > with a larger breaker ampacity, but maybe there is something better. Does > anyone no how quickly the max current setting in the Outback can respond, > would dropping this help? > > Thanks > > -- > > > > Mac Lewis > > *"Yo solo sé que no sé nada." -Sócrates* > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
