I know the old FX's didn't temp compensate in EQ mode but the charge controllers do... I know... that is what I said when I learned this years ago!
I don't think the Radians observe temp compensation while in EQ either... That would be a better question for Lones Tuss... You out there Lones? Instead of using global EQ try to EQ only with the Solar or the Inverter... BTW how much solar is connected to the FM's and how much current going to the batteries while in the bulk stage? Also is this current balanced between the parallel strings? Also, you should do an eq after a full bulk/absorb stage can/have you finished a full buik absorb cycle before starting the EQ? The best way to do this is to start the generator and run it manually let it run until you are in the float or silent mode... then at that time start the EQ... I've never been a fan of EQ'ing batteries! There are just so many things that can and will go wrong when EQ'ing. What's going on within the battery is a chemical reaction attempting to force it by cooking the batteries often does not end well. I have found that if you charge to what is supposed to be a full charge then you discharge 10-20% then charge back to full 2-3 times a day and you repeat this for a week or two this often will recover unbalanced cells faster and keep the batteries cooler (Causing Less overall Damage) than EQ'ing the battery bank. Lastly, what Dave has said, yes a dead cell, either an open or short can cause the EQ to never be fully met. Check the Voltage of the batteries at rest and at load over a period of time usually 2-4 hours @ a C10 discharge current... If you notice that the voltages drift more than .4 to .6 vdc (6 Volt L16), EQ'ing probably isn't going to help. <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> Steve Higgins ⋅ Technical Services Manager t +1.902.597.4020 m +1.206.790.5840 f +1.902.597.8447 e [email protected] <#SignatureSanitizer_SafeHtmlFilter_> <http://www.facebook.com/RollsBattery> <http://www.facebook.com/RollsBattery> <http://www.twitter.com/RollsBattery> <https://www.youtube.com/user/RollsBattery> <https://www.linkedin.com/company/rolls-battery-engineering> <http://www.instagram.com/RollsBattery> <http://www.instagram.com/RollsBattery> <http://www.instagram.com/RollsBattery> ------------------------------ *Become a Certified PV Professional. Register for* *NABCEP CEC 2020* <http://rollsbattery.com/nabcep2020> *using promo code* *20RBE* <http://rollsbattery.com/nabcep2020> ------------------------------ CONFIDENTIALITY: The information transmitted herein is intended only for the addressee and may contain confidential, proprietary and/or privileged material. Any unauthorized review, distribution or other use of or the taking of any action in reliance upon this information is prohibited. If you receive this email in error, please contact the sender and delete or destroy this message and all copies. ------------------------------ On Tue, Apr 28, 2020 at 8:17 AM Dave Tedeyan <[email protected]> wrote: > Brian, > I had tried lowering the EQ voltage by 0.4V. The batteries still get up to > the EQ voltage, but then fluctuate right at or 0.1V below. > > Dave, > The EQ countdown timer does not count down when the battery voltage is > below the EQ setpoint (even if by 0.1V). And since the timer never gets to > 0, the system just stays in EQ. > > Also, we have found that the issue is somewhat intermittent. At one point > Outback had me reset the CC and FNDC back to factory settings and reprogram > them. It seemed that it helped, but then a month or two later it showed the > same issue. So this does not happen with every EQ cycle, it just happens > for most of them. > > I also received another suggestion that the battery bank has a couple bad > cells which will lead to higher temps and so with the temperature > compensation the bank is just not getting to a high enough voltage. > > Cheers, > Dave > > *Dave Tedeyan, PE* > Senior Engineer | Taitem Engineering, PC > > 110 South Albany Street | Ithaca, NY 14850 > o. *607.277.1118 x121* f. 607.277.2119 > www.taitem.com > > Solar • Sustainability • Energy • Design > Certified B-Corporation since 2013 > > > On Tue, Apr 28, 2020 at 11:08 AM Dave Angelini Offgrid Solar < > [email protected]> wrote: > >> Does not sound right to me. Usually both Outback and Schneider protect >> against uncontrolled EQ time and end EQ. >> >> I think I would remove the network after the battery is full and test one >> controller at a time. Might have been damaged by lightning or gen >> glitching. Since you say it does this from the inverter charger on genset >> (only no fm80's) is even weirder. Eliminate the network. >> >> *Dave Angelini Offgrid Solar >> "we go where powerlines don't" >> http://members.sti.net/offgridsolar/ <http://members.sti.net/offgridsolar/> >> e-mail [email protected] <[email protected]> >> text 209 813 0060* >> >> On Tue, 28 Apr 2020 07:00:21 -0700, Brian Mehalic <[email protected]> >> wrote: >> >> Sorry you had already answered the first two questions :) What about the >> others? >> >> Brian >> >> On Apr 28, 2020, at 6:50 AM, Dave Tedeyan <[email protected]> wrote: >> >> Hi All, >> >> I've got an outback system (Radian 8048A, 2 FM80, 16 Trojan L16RE-B) >> where when the customer equalizes, the batteries hover right around the EQ >> voltage, but will often dip to 0.1v less. Because of this, the EQ timer >> does not count down properly, and so left to its own devices the system >> would equalize for way longer than it should, potentially forever. This >> will happen when doing an EQ from the solar on a bright sunny day, or the >> generator, or both. The customer can manually keep track of the time and >> manually stop the EQ after 3 hours, but that is not ideal. Has anyone dealt >> with this before and have any suggestions on how they fixed it? >> >> This system is 3-4 years old, and the issue only started in the past year >> or so. >> >> Cheers, >> Dave >> >> *Dave Tedeyan, PE* >> Senior Engineer | Taitem Engineering, PC >> >> 110 South Albany Street | Ithaca, NY 14850 >> o. 607.277.1118 x121 f. 607.277.2119 >> www.taitem.com >> >> Solar • Sustainability • Energy • Design >> Certified B-Corporation since 2013 >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/[email protected]/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: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/[email protected]/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: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > >
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