Hello Wrenches, Does anyone have a good way to get expert tech support for these batteries? Calling general Outback tech support has been terrible, they really have no idea about these batteries. Long wait times to talk to people who aren't ready to answer questions about this product. I keep getting conflicting information.
Thanks On Mon, Apr 22, 2019 at 11:07 AM Dave Angelini Offgrid Solar < offgridso...@sti.net> wrote: > This case also sounds like the classic loss of battery capacity as Larry > hinted. The genset is running too often. Time for a load test. --Dave > > > > On Mon, 22 Apr 2019 08:40:51 -0700, Starlight Solar Power Systems < > la...@starlightsolar.com> wrote: > > Hi Glenn, > > Simply because he specified the energy removed during the time period was > about 6kWh. The 100Hr rate capacity for this cell is 1150Ah or about 55kWh > of storage in the bank. 55kWh/100 = about 550W which are the claimed > overnight loads. Using the 20Hr rate (960AH) would indicate higher loads or > a greater percentage of capacity loss. I was just trying to give a more > accurate consumption total to compare voltage. > > Larry Crutcher > Starlight Solar Power Systems > > > > > On Apr 19, 2019, at 4:14 PM, Glenn Burt <glenn.b...@glbcc.com> wrote: > > Hi Larry, > > I am curious why you would use the 100Hr rate for this approximation and > not the 20 or 24Hr one, since that is the period in which Mac is reporting > the anomaly. Happy to learn the details! > > Thanks, > Glenn > > *From:* RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> *On > Behalf Of *Starlight Solar Power Systems > *Sent:* Friday, April 19, 2019 3:10 PM > *To:* RE-wrenches <re-wrenches@lists.re-wrenches.org> > *Subject:* Re: [RE-wrenches] Operating Voltages Outback RE High Capacity > Battery > > Mac, > > Only removing 6kWh from 46kWh of storage should not be able to produce the > voltage sag to trigger AGS. That's only about 13% at a 100Hr rate. Voltage > should be no where near that point. Have you verified actual voltage when > the AGS is triggered? Loose wiring or terminal corrosion can cause voltage > drop but I would think that an easy find/repair you would have checked. > > Saying the battery easily charges to 100% worries me as sulfated batteries > do that. Healthy LA batteries take many hours to reach full saturation. Has > cell voltage been compared for non-uniformity? Has the equalization charge > been performed? > > I am not a fan of the unusual low voltages that Outback prescribes for > EnergyCells and seriously wonder how these voltages can properly maintain > these cells. CV is below the point where balanced O2 and H2 evolution takes > place. But, thats off point. > > > Larry Crutcher > Starlight Solar Power Systems > > > > > On Apr 19, 2019, at 10:27 AM, Mac Lewis <maclew...@gmail.com> wrote: > > Hello Wrenches, > > We recently inherited an Outback system that I've been keeping an eye on > via Optics. Its a dual stack 3648 VFXR, with about 4kW of PV with a single > string of EnergyCell 1100RE battery bank (reported to be ~6 months old) > ~.46 kWh at C20. > > I have been observing how the system functions and how the voltage > behaves. We keep getting 2 minute voltage starts on the generator in the > middle of the night that don't seem necessary judging from how much energy > has been used from the battery bank. I am hesitant to tweak anything > because these battery set-points are a bit different than I'm used to. > > As per Outback: > Absorb Voltage is 55.6V for 2 hours > Float Voltage is 54.0V > > I've slowly been dropping the 2 minute start voltage to see if there is a > bottom, but I'm hesitant to take it much lower (maybe I should). > 2 minute start voltage: 44.8 V. > > > The system easily charges the battery bank to 100% (and easily reached the > 2 hr absorb time) every day. The flexnet DC is correctly set up and > calibrated. > > The load on the system is pretty consistent. They use between 400 and > 600W throughout the night. > > An average night, they may use about 6 kWh before the voltage sags below > the 2 minute start voltage and it starts the generator. > > Just curious if our 2 minute voltage needs to be dropped or if these > batteries are degraded. What corrective changes can I make to get better > performance? > > I have and will call Outback about this, but I'd like other perspectives > as well. > > Thanks as always for your expertise > > -- > > > > Mac Lewis > > > -- > > > > _______________________________________________ > 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 > > -- Mac Lewis *"Yo solo sé que no sé nada." -Sócrates*
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