On 2023/01/25 at 6:43 PM, isie said:

Nah, I thought this would've helped but it looks like it didn't. Still goes back and forth after being charged full. The CFE support guys said the Deye Inverter Firmware needs to be updated and this might solve the problem. So waiting for the update and will see if that solves the problem. Will keep you guys updated

Set your SOC to 98% and this will stop going from 100% - 90%

On 2023/01/25 at 6:43 PM, isie said:

Nah, I thought this would've helped but it looks like it didn't. Still goes back and forth after being charged full. The CFE support guys said the Deye Inverter Firmware needs to be updated and this might solve the problem. So waiting for the update and will see if that solves the problem. Will keep you guys updated

Hi Isie, Just completed my setup 5kw Deye with CFE 5100s battery and it has the exact same behavior. Cycles continuously between 100 and 90 percent when grid power is on. Did you manage to get any new information or fixes?

Edited January 29, 20233 yr by Franna99

23 hours ago, Murlin said:

Set your SOC to 98% and this will stop going from 100% - 90%

I did that.... but it only work when it charge from Eishkom. It does not work with solar/mppt... it will charge to 100% and then discharge.

11 hours ago, Franna99 said:

Hi Isie, Just completed my setup 5kw Deye with CFE 5100s battery and it has the exact same behavior. Cycles continuously between 100 and 90 percent when grid power is on. Did you manage to get any new information or fixes?

@Franna99, unfortunately, still waiting on my Installer to try and sort this out 😔

 

9 hours ago, nam-hunt said:

I did that.... but it only work when it charge from Eishkom. It does not work with solar/mppt... it will charge to 100% and then discharge.

@Murlin, @nam-hunt is correct, with PV it always charges to 100%, it never stops charging as long as there is enough power to charge the batteries

Hmm even when there is no grid power and ample sunlight, it STILL mixes solar + battery to supply the house. Which I really dont want to do. I want to keep the batteries fully charged so that they are usable when there is no sunlight 

3 minutes ago, Zkrige said:

Hmm even when there is no grid power and ample sunlight, it STILL mixes solar + battery to supply the house. Which I really dont want to do. I want to keep the batteries fully charged so that they are usable when there is no sunlight 

Without enough information sounds like it's working as intended

Unless you are DEAD SURE there is 0 chance that any clouds or anything might cut the solar available in SBU mode the battery will be used as a buffer to provide power when there are dips in solar production. Only way to prevent that is to set to SUB mode which will use grid instead

*Also depends on the inverter,some don't "blend" partially,it's an all-or-nothing type of affair

 

yeh let me do some more testing and confirm

On 2022/10/08 at 8:29 PM, Kiara said:

Where will I find the serial number on the CFE 5100S? I need it to register for the app! 

Kiara

 

It will ask you to scan. Or bar code on top of battery

Hi, i have a newly installed Sunsynk 8 KVA Inverter with 2 X CFE 5100s Batteries and had exactly the same issue where my batteries would charge to 100%.  Once it reaches 100% the system would leave the Solar and use battery for low load. Once the load increases it will blend battery with solar.  It will then keep the battery between 90% to 93% until the sun sets.  I contacted Sunsynk Technical Support and they did a Firmware update on my Inverter and for now it looks like the issue is resolved.... I am still monitoring, but all good so far.

Thanks PieterO

On 2023/01/13 at 1:08 PM, Claudio57 said:

Hello, I'm calling from Italy, I have a problem with the storage batteries. I have a growatt sfh 5000 inverter and CFE 5100 batteries.
The batteries cannot hold the voltage and therefore shut down. ever happened to anyone? The system is new, everything went well for a month and then it's under the problem.

Hi!
I'm sorry to hear about the issue with your storage batteries. The fact that your system was functioning well for a month before the problem occurred suggests that there may be an issue with the batteries themselves or with the way they are being used.

Here are a few steps you can take to troubleshoot the problem:

1. Check the battery voltage: Make sure that the voltage of the batteries is within the specified range for the CFE 5100 batteries. If the voltage is too low, it may indicate that the batteries are not being charged properly.
2. Check the battery temperature: High temperatures can affect the performance of lead-acid batteries. Make sure that the battery temperature is within the specified range for the CFE 5100 batteries.
3. Check the battery connections: Make sure that the connections between the batteries, the inverter, and the charge controller are secure and free from corrosion.
4. Check the battery water level: If you have flooded lead-acid batteries, make sure that the water level is within the specified range.
5. Check the inverter settings: Make sure that the settings for the Growatt SFH 5000 inverter are correct for your battery type. The inverter should be configured to properly charge and discharge the batteries.

Guys, I also have a Deye 8k and 3x CFE 5100s.

This behaviour is coming from the BMS of the battery and not the inverter. The inverter is doing what it is told by the BMS.

When the SOC reach 100%, you can see the BMS change the (highlighted) charge current to 0A.

Once the SOC falls below 90%, it goes back to whatever your stack can handle.

I guess they feel it is better for their battery to cycle than to sit at 100% all day long.

 

(It bothered me a lot at first, but I made my peace with it)

Edited February 13, 20233 yr by sjp

On 2023/01/19 at 5:31 PM, GrantCPT said:

Does your PV follow the load when this happens, or does it drop off and the batteries serve the load until they hit 90% then the pv kicks back in? If so, that's an inverter issue I had as well with my Deye, an upgrade of firmware resolved it.

It depends for me.

When there is grid power, it will handle the load with solar and slowly 'decay" to 90%

When there is no grid power, then everything comes from the battery and nothing from solar. It will cycle between 100% and 90 much faster. (Which I don't like at all)

Edited February 13, 20233 yr by sjp

51 minutes ago, sjp said:

Guys, I also have a Deye 8k and 3x CFE 5100s.

This behaviour is coming from the BMS of the battery and not the inverter. The inverter is doing what it is told by the BMS.

When the SOC reach 100%, you can see the BMS change the (highlighted) charge current to 0A.

Once the SOC falls below 90%, it goes back to whatever your stack can handle.

I guess they feel it is better for their battery to cycle than to sit at 100% all day long.

 

(It bothered me a lot at first, but I made my piece with it)

Thank You sjp for the info. Surely this is not correct? It will mean that every night you start with 10% less battery even if you had a full day of sun. Surely the OEM can supply a fix for this?

3 hours ago, Vernonstanley said:

Hi!
I'm sorry to hear about the issue with your storage batteries. The fact that your system was functioning well for a month before the problem occurred suggests that there may be an issue with the batteries themselves or with the way they are being used.

Here are a few steps you can take to troubleshoot the problem:

1. Check the battery voltage: Make sure that the voltage of the batteries is within the specified range for the CFE 5100 batteries. If the voltage is too low, it may indicate that the batteries are not being charged properly.
2. Check the battery temperature: High temperatures can affect the performance of lead-acid batteries. Make sure that the battery temperature is within the specified range for the CFE 5100 batteries.
3. Check the battery connections: Make sure that the connections between the batteries, the inverter, and the charge controller are secure and free from corrosion.
4. Check the battery water level: If you have flooded lead-acid batteries, make sure that the water level is within the specified range.
5. Check the inverter settings: Make sure that the settings for the Growatt SFH 5000 inverter are correct for your battery type. The inverter should be configured to properly charge and discharge the batteries.

Here is the spec sheet for the CFE 5100 S battery: https://cfenergy.co/products/5100 Do you notice that its chemistry is LFP, and not lead-acid?

Here is a picture. Does this look to you like a lead-acid battery?:

 

Why would you give advice to the OP about the effect of high temperatures on the performance of a lead-acid battery, when it is completely irrelevant?

Why would you give the OP advice about checking the water levels on a LFP battery?

If you are going to use an Artificial Intelligence (AI) engine to assist you in responding to questions, then:

1. Please proof-read the response before posting, to ensure that it is relevant and applicable to the question; and  

2. at the very least, give credit to the AI engine, instead of passing the response off as your own; and

3. If you really want credit for someone else's work, then at least try to disguise the fact that you are using an AI chatbot, by using an AI paraphrasing tool . Note that this will not correct the blatant factual inaccuracies, but it will make it a little more difficult to detect.

TBH I feel that what you are doing (cutting and pasting raw AI chatbot responses without even bothering to check them first) is disrespectful towards other members, plus it makes you look foolish. If you don't have a reasonable answer to a question, then rather say nothing at all, and wait for someone to respond that does

11 hours ago, PieterO said:

Thank You sjp for the info. Surely this is not correct? It will mean that every night you start with 10% less battery even if you had a full day of sun. Surely the OEM can supply a fix for this?

Yes @sjpand @PieterOthis looks like the way their firmware is working - I was having a fault issue which now seems because one of the 2 batteries I was running was on older Firmware - Leon from CFE managed to remotely update both batteries to the latest firmware and I now have a similar "feature".

 

What i've noticed is that in the later afternoon the battery charges to 100% and then the load pulls from the battery even if there is sufficient PV production - it drops to 95% (sometimes 90%) and then all returns to normal with PV handling load and charging the battery... Odd that it doesn't happen earlier during the day when charging to 100%. But at least it is not faulting and mine tops up to 100% pretty much each late afternoon now...

8 hours ago, YellowTapemeasure said:

Here is the spec sheet for the CFE 5100 S battery: https://cfenergy.co/products/5100 Do you notice that its chemistry is LFP, and not lead-acid?

Here is a picture. Does this look to you like a lead-acid battery?:

 

Why would you give advice to the OP about the effect of high temperatures on the performance of a lead-acid battery, when it is completely irrelevant?

Why would you give the OP advice about checking the water levels on a LFP battery?

If you are going to use an Artificial Intelligence (AI) engine to assist you in responding to questions, then:

1. Please proof-read the response before posting, to ensure that it is relevant and applicable to the question; and  

2. at the very least, give credit to the AI engine, instead of passing the response off as your own; and

3. If you really want credit for someone else's work, then at least try to disguise the fact that you are using an AI chatbot, by using an AI paraphrasing tool . Note that this will not correct the blatant factual inaccuracies, but it will make it a little more difficult to detect.

TBH I feel that what you are doing (cutting and pasting raw AI chatbot responses without even bothering to check them first) is disrespectful towards other members, plus it makes you look foolish. If you don't have a reasonable answer to a question, then rather say nothing at all, and wait for someone to respond that does

lol that's hilarious! dude using chatgpt and duffing it hahaha

Thank You @GrantCPT So what you saying is that we only need a firmware update on these Batteries - then it will keep its charge at 100%? Honestly, I am thinking of asking my installer to replace them with another brand.  Not sure if they are good anymore?

15 minutes ago, PieterO said:

Thank You @GrantCPT So what you saying is that we only need a firmware update on these Batteries - then it will keep its charge at 100%? Honestly, I am thinking of asking my installer to replace them with another brand.  Not sure if they are good anymore?

The firmware update definitely seems to have improved matters.

34 minutes ago, GrantCPT said:

The firmware update definitely seems to have improved matters.

Thanks @GrantCPT.  I will get the firmware updated and report back.

3 hours ago, PieterO said:

Thank You @GrantCPT So what you saying is that we only need a firmware update on these Batteries - then it will keep its charge at 100%? Honestly, I am thinking of asking my installer to replace them with another brand.  Not sure if they are good anymore?

It is actually not that bad if you think about it.

10% of the 20% that you should not use daily (80% DoD) is now between 100% and 90%, which is actually good for the longevity(lithium based batteries do not like sitting at 100%)  as long as the "micro cycles" aren't too excessive.

Edited February 13, 20233 yr by sjp

2 hours ago, sjp said:

It is actually not that bad if you think about it.

10% of the 20% that you should not use daily (80% DoD) is now between 100% and 90%, which is actually good for the longevity(lithium based batteries do not like sitting at 100%)  as long as the "micro cycles" aren't too excessive.

Thank You @sjp.  It makes sense now...   

On 2023/02/12 at 11:37 PM, YellowTapemeasure said:

1. Please proof-read the response before posting, to ensure that it is relevant and applicable to the question; and  

2. at the very least, give credit to the AI engine, instead of passing the response off as your own; and

This is a bot or a troll.
He gives generic responses all over. From Southampton if that is to be believed, yet an expert on SANS regulations too.
Do check his other posts. Siri, Alexis or whatever else out there seem to be his guide. 
No references to any of the obvious scraped paragraphs. 
Plagiarism also comes to mind.

On 2023/01/13 at 12:08 PM, Claudio57 said:

Hello, I'm calling from Italy, I have a problem with the storage batteries. I have a growatt sfh 5000 inverter and CFE 5100 batteries.
The batteries cannot hold the voltage and therefore shut down. ever happened to anyone? The system is new, everything went well for a month and then it's under the problem.

I have Raystech 5100S batteries, which are rebranded CFEs, that have BMS software problems. 

Apparently CFE is aware of these issues, here's a quote from Raystech support on a specific issue related to SOC dropping to 1% 

It might help others in the thread, so I'm just adding it here.

@MeepMoop thank you for sharing this... Just a question:  In normal operation does your batteries also charge up to 100% and then immediately the system drops the PV and uses battery even with PV available it then slowly drains the battery to 89% by blending a little bit of PV with Battery to supply the load and then charge it back up...  Not sure if there is going to be a BMS fix for this as well?