JoeMobstarr28

Hi Great to see SVolt has come onboard. I hope you can resolve a long standing issue I have with the SVolt 15S 5.09 kWh battery. When I bought the battery just over a year ago, the charging and float voltages were specified at 52.5 V and 51 V respectively. Problem is that it does not fully charge the battery, only reaches about 95/96 % SOC. The battery is paired with a Growatt SPF 5000 ES and when in LI mode, the voltages are set at 54V and this sets off OVP warnings when reaching 100% SOC.To avoid this, I have resorted to voltage control settings under USE2 on the Growatt. Now I understand the charging parameters have been revised to 54V charge and 52.5V float. I have been trying, unsuccessfully, to find out if a firmware update is required to reflect the revised charging parameters. Other than the above issue, the battery has been great thus far and hopefully you can of assistance in resolving the OVP issues.

Avid follower of the forum and have learned tons from the valuable information and advice. So, I currently have a GROWATT ES5000 paired with a 5.09 kwh SVolt battery and four 545W panels. I also have a 2.4 kwh battery(Chinese made, with a Zulu name🙄), previously connected to the GROWATT and now lying idle and would like to add it to my system. The specs of the two batteries are below-: SVolt LifePO4 : 5.09 kwh -106Ah Ikwenkwezi LifePO4 : 2.4 kwh-50Ah : 15S - 48V : 15S - 48V : PACE BMS : PACE BMS : 1C rated : 0.5C rated : Pin connectors :10mm lugs The smaller rated battery was used for a couple of months, before upgrading to the SVolt and only has about 200 cycles. I have previously asked on this forum if it was possible to add the 2.4 kwh rated battery and the answer was that it was definitely possible. I still have some more questions regarding this set-up, before proceeding and hope for more advice from forum members. I have an installer who suggests that we can run all four cables from the batteries through the battery fuse disconnector(160A) . Is this allowed or safe and compliant with regulations? My layman knowledge tells me NO and I am not comfortable with this, but he assures me it shouldn’t be an issue. My understanding is that he would hook up the battery cables from the 2.4 kwh battery with the ones from the SVolt, all four(2 positive and 2 negative) into the fuse disconnector and only two cables going into the inverter. The installer has been trying to source the correct pin connectors, for the SVolt end with no success thus far, hence the suggestion above. Surely there must be another way or am I being overly cautious? The other question is regarding battery communication, would it be possible with both batteries connected or should I opt for voltage control? My other concern is the different charging parameters, 52.5 V for the SVolt and 54V for the other one, would this be an issue? I must also state that both batteries are able to communicate with the GROWATT. Apologies for the longish thread and look forward to the advice of forum members.

I had the battery charging at 54V, both bulk and float under LI BMS mode. This resulted in OVP warnings and then I just used voltage control with the recommended settings of 52.5V charge and 51V float. The frustration in my case is that, while the OVP warnings stopped, the battery would not charge up to 100%, only got to around 96-97% SOC and would over time drop to around 89-90% SOC charge. I then have to resort to Li BMS mode again to get full charge(with OVP again!) and then back to voltage control to stop the OVP.........super frustrating!!!!

Quite interesting the recommended voltages have been changed. I have the SVolt 5.09kw and the charge voltages as set by the inverter always triggered OVP warnings under LI BMS mode. Would these new charge settings require a firmware update or just leave it as is with the OVP warnings?

Something to do with a Growatt algorithm and is normal, issue has been a bugbear for Growatt owners for ages.

Thank you guys for the input, another valuable lesson learned.😞

Hi there I had this problem( error 52- Low bus voltage) come up out of the blue. I was watching TV on a Sunday and then boom! Switched off everything, restarted the system and the error was cleared. Over the next three days, I noticed some strange behaviour, whenever the TV was switched on, without fail, ten minutes or so later the error popped up again and shuts everything down. Moved the TV to another location in the house and no issues, mind you, my system had been in operation for about ten months without any hassles. I reached out to Growatt and no response. This happened while I was using a smaller 2.4 kwh battery and since I was in the process of replacing it with the SVolt , I haven't encountered the error ever since, until a couple of days ago......I decided to test my 2200w lawnmower using solar and see how it would handle it. Error 52 popped up again! Really odd, because I can run most appliances without any hassles, even had an oops! moment when the kettle and microwave were on at the same time and that didn't trip up anything. So yeah, can't really give you a solution and maybe some forum members with more knowledge and expertise might be able to assist.

Same as yours. Growatt 5000ES and SVolt 48 V 5.09kw.

Yes.The other downside, in my case, is that LI BMS mode sets the charge and float voltages higher than recommended and this triggers OVP warnings on the BMS. I ended up opting for the USER2 mode and you can set your voltages and charge current.

I had the same issue on my setup. Change LI protocol to 04 and that should go up to 95 A. Alternatively you can go to CAN - L52.

Hey @PsyCLown Is there a way of making adjustment to the battery parameters, without affecting the warranty? I have the 15S, 48 V version of the battery. I am sitting with a problem here, I am using voltage control settings where the battery gets charged up to around 97%. LI BMS mode sets the charge and float voltages higher than recommended settings and triggers OVP warnings. I would ideally prefer to have proper comms between the inverter and the battery. I have reached out to the SVolt rep and initially he was quite responsive, but have not received a response in over a week.

RS485- L02/L04 CAN- L52

I have a Growatt ES 5000, that was paired with a 48V 2.4 kw 50AH LifePO4 battery for about ten months. I upgraded to a 48V 5.09 kw LifePO4 and added some panels. So, I was having a chat with this installer who asked why don't I have just add my previous battery(2.4 kw)to the system and this obviously piqued my interest. Is such a scenario possible? The batteries are both 15s with the same BMS(PACE).The other difference is that the 5.09 kw battery is using pin connectors, while the 2.4 kw battery uses 10mm nuts. This obviously poses a challenge on what kind of parallel cable to use, or can one be custom made for this purpose? I have tried to look into the possibilities of such a set-up and getting conflicting information, some say it can be done while some say it should be completely avoided. Any insight on this possibility?

Hi there, CAN- L52 RS485- L04, works similar to L52. Had issues with L02- limits charge current to 5A. I have given up running on LI BMS mode, voltage is set higher at 54 V on both bulk and float( SVolt recommends 52.5 V and 51 V) and this is what leads to the OVP warnings on the BMS. I have been on USER2 ever since with less hassles.

I bought the SVolt 5.09 KW 15 cell version to replace a 2.4 KW battery which wasn't meeting my needs. Pretty impressed with the brand except one or two minor niggles. I have set mine to USER2 mode( GROWATT ES 5000) because under LI mode, the voltages are a bit higher than recommended, which triggered OVP warnings on the BMS.

Hi there Thanks for getting me in touch with the SVolt guy, he was of great assistance and I finally managed to sort out the 5A charge limitation issue. Got it working under CAN protocol and it's now sitting at 95A. The voltage was automatically set to 54 v on both bulk and float, slightly higher than what he recommended. I will monitor how it goes and hopefully it'll behave😕

Hi Finally got around to testing the L52 protocol on CAN. Turns out the installer was going about it the wrong way and I decided to do it myself. Glad to report that it works and the charge current was automatically set to 95A under LI mode. Thanks to all the forumites for the help.

@zsde The USE mode has higher voltage control limits compared to USER2 and is slighty above the battery parameters- so I decided to stick to USER2. I still need to see what protocol works best with SVolt. @Bobster.I tried various pinouts but can't say with absolute certainty that these are correct, currently using the cable that was supplied with the battery and that was the only one that I had some progress with. @PsyCLown I can try your suggestion but I am not so hopeful...Sent them a query last month and got no response. Thanks to the other forum members for your input, much appreciated.

Tried two CAN protocols, L52 and 54 and no success there.

We had great difficulty getting the battery to communicate with the inverter after installation, trying numerous protocols with no success. Eventually settled on the L02 protocol via RS485, but then came the hurdle of the 5A charge limit. I would prefer the battery and inverter to communicate via LI mode, but I end up with a battery that takes forever to be fully charged, hence the USER2 option. This has now presented another hurdle of the OVP warning on the battery. I will give the USE option a go and see how that goes, thanks for the tip. Apologies to @MightyDee for highjacking the thread.

I have a slightly different scenario. Same battery with a Growatt ES 5000 communicating via RS485. The maximum charge current is set at 5A and cannot be changed in LI mode and I am forced to go to USER2 mode. This allows me to change the current and voltage limits, however, despite the recommended settings, as soon as it reaches the fully charged state- the OVP warning on the battery is triggered. I have tried lower charge settings and the issue still persists. What I have noticed though, is that as soon as the reaches 100% charge, the inverter inexplicably displays higher voltage settings, slightly above the preset ones. So, what I have done is , once the battery reaches the 99% mark, I quickly revert back to LI mode on the inverter to avoid the OVP warnings. I know this is not an ideal way of doing things, but my frustration is the less than ideal charge current setting limitation on the Growatt. I tried reaching out to Growatt and pointed out the issue to them and they simply responded by saying to just go with the USER2 setting. So, my thinking is that the OVP warnings are more on the inverter side than the battery itself- stand to be corrected though.