Batteries

Hi all, What sort of tests would one do when buying used/ secondhand lithium battery other than measuring the voltage? Most lithium batteries have smart parameters, so believe it will be possible to read the number of cycles and SOC status? Some people have issues handing out original invoices because they claim it contains their personal details, but I find it strange because you will already know their first names, probably last names via TrueCaller if you have their number, and invoices rarely have customer address; so that claim doesn't hold water. I would personally ask for the original invoice if the battery is new/ or few months old just to satisfy myself tha…

Good morning to all the guru's (I am technical ignoramus - and Newbie on this site, plse excuse any breaches of protocol - I have posted this same message under an old existing thread) I just replaced the previous batteries on my system with 3 Pylontech US3000C batteries - similar to other people (Deejay and Occo in a different thread) I have problems connecting the battery BMS to my inverter as the US3000C has a RS485 port while my inverter has a RS232 comms port. I have a Solax SK-SU5000E inverter. I see that that Deejay and Occo found a solution for their comms cable problems and if anybody could help me to similarly find out what the pinouts must be to conne…

I was blown away by the good pricing of the new battery (I compared it to the SecondLife 5.1 by Revov) and it compares very favourably with it out-specking it on every front except being 300W smaller. But I had never heard of LTE corp. My early research place it as a very large telekoms player which did not inspire me too much. However this url https://batteryindustry.tech/pylontech-launches-5gwh-lithium-ion-battery-project-in-china/ allayed most of my fears. I do believe this is the battery of choice for my new install. (I am probably telling the boffins nothing new but maybe some of the other Noobies will find value.) Has anyone bought an LTE yet? Your impressions pleas…

I recently bought 16 x 3.2V LiFePO4 cells, they were top-balanced before assembly into a 48V battery and then connected to a Axpert 5kVa Inverter/charger. The Axperts' settings are 55V max (3.44V per cell), 48V cut-off (3.0V per cell) and monitored remotely through a Pi with ICC. A 2A active balancer is permanently connected and currently there is a variance of about 0.085V or less between cells. Temps below zero are not expected. I've been told that this is not sufficient and that a BMS MUST be used and that an active balancer should NOT be connected permanently. Is this correct?

Good day all! Thank you very much for reading this - I really hope I can get some insight as to the problems we are experiencing.... We have multiple sites running with PSS SH-series inverters (http://pss.co.za/wp-content/uploads/2017/06/PSS-Distributors-SH-Series-Inverter-Brochure.pdf) together with Omnipower OPR batteries. When we install the system, we test current draw to estimate backup time. Example A: For example we have a site with a PSS SH-600 inverter and one Omnipower OPR120 battery. We set the charging of the inverter to 20A as per battery specification. We have a current draw of 5.56A from the battery during power outage, and this estimate…

Hi all My lead acid cells seem to be coming to EOL. I'm thinking of going with a DIY LFP solution. I've noticed these cells for sale: 100AH 3.2v 2nd Life LiFePO4 (lithiumbatteriessa.co.za) Anyone had experience with this seller? Anyone else attempted to do this yourself? I built an eBike and used a smaller version of this JBD 200a SMART BMS. They are fully customisable in terms of cut-off voltages, balancing, etc. and on my eBike, that BMS has been incredible rock-solid. (not to mention that online they refer to these BMS as "overkill" solar BMS) I'm trying to wrap my head around the high cost of pre-built units for LFP. Is it because of …

Hi Gents, I got myself 2 x sets of Revov 2nd life batteries with the BMS systems. My current setup is 48V(4 x 100ah batteries), can I run them together on the same system, looks like my current 48V system draws power from the Revov system, almost like getting charged. If any one can help please.

We have over the last 2 years collected a little warehouse of led acid batteries through UPS's that go flat during loadshedding / interruption and stops to work after 3 - 4 full drain cycles. Some of these were our own mistakes (not knowing how these batteries work) but some unfortunately was out of our control, having said that, the result remains the same. So, I have gone ahead and purchased a battery tester, digital meters and a "trickle charger" and want to know some basics: Given what I have, what is the best way to test if a battery is a gonner? Must the battery first be charged and then tested, and if so, what does one look out for? The battery tester…

Hi guys My setup is as follows: 8 330w panels in series 5.5kw vmii plus hybrid inverter 4 200ah oliter gel batteries in series to get 48v My problem is that the batteries discharge and charge way too fast.Last night with load shedding i ran a load of 250w and battery voltage want down from 51.6 to 47v in under three minutes.On the day before i ran a tv of 130w and same thing happened.Also when it is on Ac batteries charge to full 52v in under three minutes.Something is fishy here.During sunny weather i can run a load of 1200w of my panels with no problem. Hybrid settings as follows 01 SOL 02 20A 03 UPS 05 AGN …

We have been experiencing a lot of power outage ... over and above load shedding during the past few months ... this setup is only used as a backup power supply (old RCT 5 kva inverter) The pic attached is the standard curve seen whenever we loose power ... as the batteries age and we add more load ... so the standby time shortens. We could go 4 -5 months without loosing power ... for this reason I have set the charge current at only 10 amps ... and as you can see in the attached pic ... it only takes 3 hours to charge the batteries. I cant add another set of 4 batteries because these batteries are already 3-4 years old. With my limited knowledge o…

Good day all, I'm new to this and load shedding has got me really frustrated, so appreciate all the assistance in advance. I've decided to install an inverter back up power supply system at home and require some advice. Purpose: Mainly for load shedding and adhoc power outages Kw Usage: I estimate I consume approximately 2.5-3kwH. Essentials that would be powered by back up are led lights, fridge, 2 x freezer, 2 x TV, 2 x decoder, phone, modem, single door garage motor, ps4, 2 x fan, 4 x led lamps, clock radio Invertor: The Mecer 5kw hybrid seems like a reasonably priced unit, and very common in the market, so I am considering going with this + I hav…

My installer completed my installation over the weekend. Tomorrow would be the last day he is coming and I raised some questions with him but I am not totally sure about the setup. 1)He plugged the battery comms cable on CAN and battery setting on "Use Batt %" and not lithium(Alarm goes off when trying to change to lithium-tried changing to Rs485A with no luck). Is this correct? I saw on another post that a user did in actual fact connect the deye to the shoto battery. 2) My usage shown on the touch screen only shows usage on the backup load and not overall house usage. Is this what it suppose to do? What is potentially wrong here as I see when the oven, stove …

Just a bit of FYI Bought a BMS from lithiumbatterySA.co.za where the BMS suddenly stopped working after about a month. I chatted to the tech department who basically said there is nothing they can do and said it was just from wear and tear. (Ive had it a month). This was pretty amusing as a few days prior the same tech guy said it was probably a loose/bad weld on the board. I stated that i thought it came with a 1 year warranty but they said there was nothign they can do. Thought this was an interesting warranty Anyhow It took a bit threating consumer act thing and going online for the tech guy (Ben was his name I think) to wake up. His boss I believe…

So we have load shedding and bad weather. What a combination. I can mitigate against this by charging my batteries ahead of the load shed slots. But how fast can I charge? On the Goodwe inverter charging from grid means Economy mode. This expresses rate of charge as a % of rated current? I called the guy from Revov, he says 60A to 80A is good. But Goodwe wants a percentage. The settings on my Goodwe show charge current at 90.23 A. So can I say 80/90.23 = 88% and charge at that %age?

I have 4x 100ah AGM Batteries (mainly to get though loadshedding), grid tied. I'm curious about the exact correct settings to charge on my Deye 5K and what voltage I should consider "empty, do not cross" Typical loadshedding at night brings battery percentage down to about 86% / 49V after 2 hours Does it make a big difference how fast this type of battery charges?

Hi guys, need help please. Which Lithium ion battery will work with a Synapse 3.0+ 24v inverter. Suppliers not sure themselves.

I'm really new to this, I would like to know the opinion of the experts. I'm a bit concerned regarding the usage of my battery. I'm not sure if I'm using it correctly in order to maximize it's life span. Not using BMS, I'm using the settings on the Growatt to charge, discharge and float voltages. I have 2 X 5 KW growatt inverters and 12 X 400 W 1 X 5 KWH LI Battery On a nice sunny day by about 10:00 AM my battery is fully charged, and my PV is generating over 3,5 KW. I then switch the geyser on, in about an 1 hour and 1/2 the geyser thermostat switch the geyser of. After 12:00, the system is idling, basically just trickle charging the …

Greetings everyone. I'm hoping someone can give me a hand to read RS485 data from my Pylontech batteries. I have connected my Pylontech batteries (4x US3000) to a Raspberry Pi through a RS485 cable connected to a USB to RS485 converter. I am running the Pyloncom.py software (downloaded pylon485-elbow.zip from this post). I had to change the baud rate in the software to 9600 before I could get any readings, but after that change it managed to detect the 4 batteries and retrieve data from them. The problem is that the data I am receiving does not look accurate, particularly the BatterySOC reading and the RemainingAh readings. What is even more strange …

Good Morning I have four SHOTO SDA10-4850 Batteries connected to a parallel system with two 5kw Mecer(SOL-I-AX-5NB) inverters. I have two questions regarding the communication of the batteries, 1. First of all I want to connect the barriers with each other so they can communicate with one another. Can someone please post a wire diagram or a picture of such a system. Please include the position of the dip switches also. 2. Secondly, can I connect my battery pack to my inverter(communication)? Thank you Mariud

I got a 5kw rct inverter with 10 360 w solar panels and 4 lithium batteries in in the day with loadsheding it works great but after 18h00 when loadsheding the batteries run only 40 minutes what is the problem my geyser is not connected on solar

Good day all, Does anyone know the communications protocol of the BlueNova BN52V-xxxx range? Looking at designing a controller (Raspberry Pi / ESP8266 / ESP32) to communicate to the batteries and operate relays based on SOC. Or have anyone maybe designed something like that? Thanks Jacques

Good day, I have been battling with this new behaviour for a few days, since upgrading the US3000A from V1.3 to V3.4 (updated due to requirement to add 2 x US3000C). Update went fine and new BMS battery screens are available in the Victron Display as expected. The ESS system is set to Keep Batteries Charged, as the system is basically used as a UPS. The night time charging is where things changed after the Pylontech update, no other settings were changed and there are now coms errors or alarms, etc. The charge mode now cycles between Bulk and Absorption and the 48V BUS Voltage between 50.2V and 52.4V (previously it was kept at 52.4V (Battery is at 10…

I've mentioned this before. I get a puzzling situation on my system where reported SOC makes a sudden jump. This happened today Now this has been worrying me. It's happened quote a lot lately. The jump always happens when 1) SOC drops to 40% or lower 2) When reported SOC rises back to 70ish %. So what do I believe? The 70 or the 100? I mailed Revov. They sent somebody out to test the batteries. This pleased me - I have some support. The technician checked ONLY the batteries. This seemed fair to me. The rest of the system is not theirs. Some points that emerged from this 1) The Revovs are "1C" batteries. As I understand it, this means th…

Hi, Has anyone here used Vestwoods batteries. I got a quote that included Vestwoods vt48100e s06, but I'm having some issues finding for their usage in SA (outside of telecommunications usage). TIA

Hi all. I hope well. I am assisting a chap that has 2V cells x 12 for 24V. They pretty old. Unfortunately he does not have the financial capacity to purchase a new bank I recommended a battery desulfator. As the units are fairly old. I have seen some videos on YouTube of a some battery desulfators are permanently hooked up to the battery bank and deliver the pulse x amount of times during the day or week. What can you gents recommended? Sincerely Jason