Hi Steve, I'm curious about the temp sensor location. Some OEM's use a bolt on type. How do you find this for accuracy?
Thanks Jay Peltz power. > On Jan 19, 2016, at 8:01 AM, Steve Higgins <st...@surrette.com> wrote: > > The testing that we have done with our batteries, is well over 90% completed > has actually increased cycle life and performance even at the higher charging > voltages… We are testing at 2.6vpc just for your information, these batteries > have actually tested at over 110% capacity. That being said this is also in > a lab, where temps are controlled.. In a “real world” situation temperatures > are a killer for any manufactures batteries, this is why all systems need a > BTS installed. It’s hard to believe how many don’t install them, nor do > they install them correctly… As all of you know they should be on the side > of the battery, below the level of the plates, this is normally about 1/3 to > ½ way down the battery. They should never be on the top. > > > > From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On > Behalf Of RE Ellison > Sent: Tuesday, January 19, 2016 7:07 AM > To: RE-wrenches > Subject: Re: [RE-wrenches] Battery Charge Settings. > > OK Steve now you got me thinking, > Some would say that's a bad idea! > > Using the voltage settings you're speaking of what would you recommend for > equalize charging ? > > I have always thought that different settings for different times of year was > logical but you're getting your bulk up you know what I would normally > consider to be a low side of the equalization charge. > > Understood that rolls charge differently than a lot of other batteries I > believe it's due to plate density? > > Thanks, > bob ellison > > On Jan 19, 2016, at 8:52 AM, Steve Higgins <st...@surrette.com> wrote: > > Good Morning Wrenches… > > I’d like to take the recent Trojan thread to throw this out there! > > With the IEC certification, many battery manufactures are being forced to > recommend higher settings to charge their batteries. The problem with off > grid systems, or even some grid back up systems is the settings can/will vary > from end user to end user and can be very difficult to determine. Try to > avoid setting up a system and assuming that those settings will be good year > round as settings in most systems need to adjusted at least twice, sometimes > up to three times a year. > > For example, we are almost finished with IEC testing, the way they do this > testing in short is they take a battery, charge it to full using mfg > suggested settings, discharge it to 100% and they cycle the battery until it > comes to full capacity. Don’t quote me, but IEC testing requires the > batteries to come to full charge within the first 8-10 cycles. To do so, > you need to be very aggressive on the charging settings. > > Now, most customers don’t cycle to 100% depth of discharge so end users don’t > need to be so aggressive on charger settings, but we will be publishing > revised charging parameters and instructions in the coming quarter. Bottom > line, Bulk/Absorb Voltages @ 25 Deg C you will be advised to charge the Rolls > Batteries at 2.45 to 2.5vpc. This number will vary based on how much the > customer is using the system. A weekender cabin with a decent sized array > (<10% of C20 Charge Current) will need closer to 2.4 to 2.45vpc, while a full > timer (daily heavy cycles) will need a setting closer to the 2.5vpc rating. > > > Remember, regardless of where you are in the world, unless the batteries are > installed in a temperature controlled room where it fluctuates less than ½ > degree C, you should ALWAYS, ALWAYS use battery temperature compensation. > Failure to do so, will always result in premature failure of the batteries. > > Settings are generally a suggestion, the problem is they (customers) should > be looking at the SG’s at least on a quarterly basis and adjusting settings > when necessary. Lower trending SG equal higher settings, higher SG equal > lower settings. I find that too many people set up settings and forget them, > until they have a problem. Normally I find with most customers they should > have a bit lower settings from April to Sept, while settings should be higher > from Oct thru March. > > Remember, the battery companies you are dealing with generally don’t have a > lot of experience in solar… they are used to industrial applications where > you see 8-12 hours of charging every single day. We all know that in most > Off grid systems you are lucky to get 3-5 hours, at best of decent charging a > day. > > > > Steve Higgins > Technical Services Manager > P: +1.902.597.4020 > M: +1.206.790.5840 > F: +1.902.597.8447 > Surrette Battery Company > Exclusive manufacturer of > <rollsae305d> > > > From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On > Behalf Of Theo Van > Sent: Monday, January 18, 2016 8:44 PM > To: RE-wrenches > Subject: Re: [RE-wrenches] Trojan L-16 charge settings > > > 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 > > This email and its attachments have been scanned by mailWatch E-Mail Firewall > for viruses, spam, and malicious content. 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