Derek Ramos

@Sidewinder So I managed to use my brothers battery to test communication.. communication to the inverter with my brothers battery was 100% (BX51100) so now I have narrowed it down to all 4 batteries have a problem with the BMS communication and the inverter is not the problem. I'm going to have to try contact Dyness to see if a technician can come out and test the batteries or if I can take the batteries to Dyness for testing. does anyone maybe know someone or have contact details for Dyness? @Dyness @Dyness Engineer Weizhong

Thanks @Sidewinder I requested and upgrade of firmware from Sunsynk, they pushed through the update pretty quick although nothing has changed with the system.. I'm still unsure if I have an inverter issue or battery issue. What I am going to do is bring one of my brothers BX51100 batteries and connect it up to see if I can find the source of the problem. do you perhaps know the exact settings required to run the batteries in voltage mode? Thank you for your help.

Hi Randomly out of the Blue my 4 x Dyness BX51100 batteries stopped communicating with my 8kw Inverter. The system has been running flawlessly for 2 years with no issues at all. Last night I noticed my batteries displaying green lights on 1 & 4 of the soc percentage bar. All of my batteries displaying the same and the inverter is not reading the batteries in the LI-BMS menu. I have battery one set as master (dip switch correct) and 3 other batteries as slaves(dip switch correct) I have tried the following : Restarted the whole system, Replaced all the cables Tested each battery individually to see if the inverter starts reading. Performed a factory reset on the inverter. Done multiple start up procedures. at this point I have no idea what else to do, I can’t get hold of anyone at Dyness. I also can’t remember how to request a firmware upgrade from sunsynk. Any help would be greatly appreciated.

Hi all, I’ve got a friend in Cape Town, he is looking to install a system at his house that’s currently being built, he does not have much knowledge in solar and inverters. He received a quote which seems to be okay in price, but after looking through some of the company installs I’m not quite happy with their workmanship. I’m also not sure how knowledgeable he is and how much after sales service he will provide. so I’m looking for credible companies with good workmanship and good after sales service. To me this is more important than price. I would gladly do his installation as I have done for most of my family members, but I live in JHB and don’t have the time, I won’t be able to provide the service he might need or provide him with a COC. Basically he won’t have any utility service so it will be completely off grid. It’s not a massive house and it’s only 3 people staying there. Gas geysers are installed but all the particulars can be discussed on site inspection. It would be great if you could list your company details and we will contact you for a quote or site inspection Thanks

These are still available

Yes I am

Why the geewiz and not the growatt or mecer. I run a sunsynk in my house so I don’t know anything about these smaller inverters

https://pss.co.za/product/3000va-sh-series-inverter/ this is the one I wanted to use it with thanks I’ll check out the geewiz one

It’s a PSS inverter. www.pss.co.za there’s not user settings, took the inverter to the supplier to check it out and that’s when they told me their inverters don’t work with lithium batteries. Now I’m just sitting with these batteries. I am considering buying another small inverter to use these batteries for my office but I don’t know which inverter would be best. Was thinking of maybe a 3kva growatt or something

These are still available

I have two available, R6000 each

Hi I bought these batteries for my brother to use on his inverter at home. He was using lead acid but I thought these would be better and last longer. Sadly the inverter doesn’t support LiFePO4 so we landed up buying gel instead. I kept the batteries to use on my dads growatt inverter but now we have decided to buy a 5kw instead so I have no use for them. There are two for sale.. would like to sell them as a pair. Item: Security-prod 100ah (1280w) LiFePO4 (drop in lead acid replacement) Age: bought in Feb, never used Price: R6000 each Payment Method Accepted: FNB GEO or cash Packaging: original Condition: Brand new Location: Johannesburg South Reason: not needed Shipping: none Collection: yes

Thank you so much, I’ll look into

Hi, I bought lithium SLA replacement batteries, sadly it is not compatible with my inverter, what inverter can I use to run these batteries. It’s not for my personal use so I don’t want to blow the budget

Thank you so much, I haven’t had time to get on this yet but I will do it soon. Thank you for your help.

Hi @I84RiS its using CAN Okay that makes a lot of sense.. Thanks I don’t think I’ll be doing this I haven’t tried to do this and I don’t know how to do this… but I’m going to do some research on it. thank you for your reply.. was very helpful I read something on the sunsynk forum where multiple people have this issue, apparently I need to get someone to come and upgrade the firmware and also there is a setting that makes the battery beep when it’s fully charged that needs to be taken off.. kind of makes sense because when the SOC changes to 99% the beeping goes away, and it’s the same for multiple uses…somehow I don’t think it’s a battery issue but a firmware and settings issue.. I will keep this post updated incase anyone has the same issue

Hi, @Loman I’m also no expert but I have watched a few videos on how much strain the cells take once they have passed 90%… so because my system is oversized at the moment my whole house runs off the batteries from 5pm at night and at 7am in the morning my batteries are only at 75%… so for one I don’t need all that capacity so if I can take some strain off the batteries by charging it to 90 or 95% then possibly it will prolong the lifespan and maybe sort out my overcharge alarm. Even if I change my inverter in the mode setting to charge to 90% , with the panels during the day it still charges to 100% and then trickle charges through the day. I was thinking I need to change the charge voltages in my battery settings but I’m not sure what’s the best settings or if that’s even the right thing to do. bottom line is I need to sort out my beeping alarm and only charge the batteries to 90%… I also read it could be a firmware issue but have not clue if I can update the firmware of the batteries.

Hi, so I have an 8kw sunsynk inverter and 3 x 5.12kw sslb1 sunsynk batteries. I have 16 470watt Jinko solar panels. 8 on 1 mppt and 8 on the other. System has been running flawlessly since august last year. recently I have been having a problem where one of my batteries ( middle one) beeps.. after checking out the manual and forums and googling I think it’s an over voltage alarm.. because when I start to discharge the batteries the beeping stops. the inverter gives me no warming signals or faults. All my charge voltages are set on the inverter as specked from the manual. does anyone know of a solution? I actually don’t want to charge my batteries to 100% anyway but I can’t figure out how to do it because it charges to 100% regardless of the mode it’s set on the inverter.

Not 100% sure I get dealer prices from a certain company.

Thank you @Bobster. I think he messed up the first two batteries within the first year… now 4 100ah lead acid only lasts him like 1.5hrs and he is only running led lights and modem. I wonder if he balanced these batteries it would help.. I’m going to make another topic regarding these batteries and balancing. I think it would be beneficial to have a balancing device in any case just to prolong lifespan. We also going to rearrange his plugs so that he runs bare minimum on these batteries.

So a family member has a small inverter that can charge at 20a and 40a… he has now gone through 6 lead acid batteries in the past 3 years.. because the funds are limited he decided to rather just buy new batteries instead of upgrading his system so I convinced him to spend a little more and get lithium. we have just bought these Price was far better than any other brands and I figured it should be okay as the lithium cells are new and it has a bms. What do you think? We had to move quick as they only had two in stock.

Hi, what about buying SLA drop in replacement, 12.8v 100ah lifePo4 battery.. are these batteries worth buying rather than buying gel or lead acid.. are they worth the money?

Hi Joe, you are 100% correct, you have to many panels on one string… after getting some professional advice I landed up using 16x 470 watt panels… 8 panels per string just for safety purposes… in future if I don’t find the same panels I can connect all 16 panels on one string by connecting 8 in parallel… but that’s another story. about your setup, if you connected 6 panels on each string it won’t effect your solar production because your panels will still be hitting the same amount of sun time… your inverter will combine both string solar production… even if it did effect your production I would still only put a maximum of 8 for the safety of your inverter. Someone told me that they just make the 150v startup voltage with 4 panels on one mppt so I would suggest going 6 panels per string per mppt. I think you just looking for trouble have 12 panels on 1 mppt.

I wouldn’t know, my inverter was practically new and I had a very old firmware version on there

I did realize that that gate motor power is coming off a different meter, we have 5 meters in the complex… 4 houses and one community property meter. So maybe this is why it would work on another supply.