No "settings recommend by Trojn"were shown. > On Jan 18, 2016, at 6:43 PM, William Miller <will...@millersolar.com> wrote: > > Colleagues: > > I have an off-grid customer for whom I replaced a set of 8 Trojan L-16s as > well as upgrading her inverter and charge controller. Right after the job, > we found several batteries with low specific gravity. We spoke with the > local distributor and received two replacement batteries. > > The system continues to perform poorly. The customer EQs every 30 days to 60 > plus volts for 3 hours. They try to get a full bulk and absorption charge in > every day but this time of year may not. The specific gravity readings > continue to diverge and generally go lower. > > We contacted the distributor who told us they have had problems with Trojan > batteries since the company was sold about two years ago. We were told they > had a brand X battery that tested better than the Trojans. We agreed to try > the Brand X but then were told that we had not charged the Trojans > adequately. Below are the settings recommended directly by Trojan > > These settings are significantly higher than any I have used before. Also, I > don’t recall it being possible to set different bulk and absorption voltages > with any of the equipment I use. I use Trace, Outback, Schneider default > settings of 57.6 bulk, 54.4 float and reprogram to 60.5 for equalization. > > I am curious about what charge settings you find successful for flooded > lead-acid batteries and what any of you might think about the recommended > settings as seen below. Do you feel it is practical to achieve these settings > in an off-grid scenario? Would these high settings cause excessive water > consumption? > > Thanks in advance. > > William Miller > > <image001.jpg> > Lic 773985 > millersolar.com > 805-438-5600 > > > > I looked at the spreadsheet and the SG. readings across each battery are > uniform which tells be that it is highly unlikely that anything is wrong with > the batteries except for being under-charged. Take a look at our User’s Guide > on the Trojan website on page 19 ( Recommended Charge Profile) or FLA > batteries. > The Bulk stage should be @ 59.3V, Absorb @ 58.8V, Float @ 54V and > Equalization @ 64.8V. When the User notices drops in the SG such as in this > document, an EQ charge should be performed in order to get the batteries back > up to full charge (full charge SG being in the range of 1.270 to 1.280. When > performing the EQ, the user should take SG reading for a “pilot” battery > every 30 minutes until the voltages reach that range. Termination should > happen when SG reaches full charge range or if battery temperature reaches > 112 degrees F, which-ever comes first. SG readings can be taken during EQ, > but you have to make sure that you bump the tiny gas bubbles off the > Hydrometer float to prevent erroneous readings. > Seeing the SG readings decreasing after each month is an indication that > maybe the Absorb Time needs to be increased, maybe from 3 hours up to 4 or 5 > hours. > > _______________________________________________ > 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 >
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