Hi,

After reviewing as many of the CFE5100 & 5kw Deye posts as I could find, I was unable to find anyone with the same issue as I am having.

My completely off grid 5kw Deye, 2000W of panels & CFE5100 battery both work very well until the battery gets to 100%. Then, randomly, the battery will go into an error state and shut down - and inverter will then also shut off. If I am onsite, then I will reset the battery and introduce some additional load to drop the battery below 100% and then all works fine - until we get back to 100% battery. This battery error at 100% does not happen every time - it appears completely random but probably 75% of the time - I cannot discern any pattern. If I am not onsite, then the system will usually reboot itself after a while.

I can only assume that the battery (and/or inverter?) are somehow not getting rid of the excess incoming solar.

Anyone else have a similar setup to mine and seen this issue? Or managed to solve it? 

Any guidance hugely appreciated.

Cheers

S-gate 

@surfgate check the bms screen and post it so others can help.

Hi @Buyeye - thanks for replying. I use Solar Assistant (see screenshot below) for remote monitoring and I understand it shows less detail than the actual battery BMS would. I tried (for hours) but was never able to get the CFE App to work. The info below is pretty sparse.

I will have to try again and get the CFE app working - found a thread on it this morning.

 

Screen below shows 2 situations where the battery went into error state and turned itself and inverter off.

Edited January 29, 20242 yr by surfgate

An update on the above - I am hoping this info helps when one of the experts on the forum sees it:

- The battery has now hit 100% and has not reset (yet) or gone into an error or showing F56 error on the inverter (yet)

 Question: When the battery hits 100% SOC, should the power and Current indicator not go to zero?  

 

7 minutes ago, surfgate said:

An update on the above - I am hoping this info helps when one of the experts on the forum sees it:

- The battery has now hit 100% and has not reset (yet) or gone into an error or showing F56 error on the inverter (yet)

 Question: When the battery hits 100% SOC, should the power and Current indicator not go to zero?  

 

Lithum-based batteries will usually balance for a while after hitting 100% (my own battery pulls about 0.1C - 0.2C for up to 30 minutes)

 

Check again in 30 minutes and let us now?

My neighbour had exactly the same issue with 4 CFE-5100S connected to a 8kw Deye. Leon from CFE came out to his house and updated the firmware on all 4 batteries. He also switched him over to the new Smart Energy Plat app. Have a look at this thread -> CFE - 5100s Batteries - The Final Showdown! Warning, it's not pretty! - Batteries - Power Forum - Renewable Energy Discussion. Leon left his local WhatsApp number. Inverter firmware was also updated at the time. I haven't heard him complaining again about the issue.

 

21 minutes ago, JayMardern said:

Lithum-based batteries will usually balance for a while after hitting 100% (my own battery pulls about 0.1C - 0.2C for up to 30 minutes)

 

Check again in 30 minutes and let us now?

Thanks @JayMardern

You 100% correct - the battery power & charging activity dropped way down. No errors yet - but I know its coming 😬

14 minutes ago, JKKM said:

My neighbour had exactly the same issue with 4 CFE-5100S connected to a 8kw Deye. Leon from CFE came out to his house and updated the firmware on all 4 batteries. He also switched him over to the new Smart Energy Plat app. Have a look at this thread -> CFE - 5100s Batteries - The Final Showdown! Warning, it's not pretty! - Batteries - Power Forum - Renewable Energy Discussion. Leon left his local WhatsApp number. Inverter firmware was also updated at the time. I haven't heard him complaining again about the issue.

 

Thanks @JKKM - I will go through that thread in detail. 

1 hour ago, surfgate said:

An update on the above - I am hoping this info helps when one of the experts on the forum sees it:

- The battery has now hit 100% and has not reset (yet) or gone into an error or showing F56 error on the inverter (yet)

 Question: When the battery hits 100% SOC, should the power and Current indicator not go to zero?  

 

On the luxpower app, it shows 50A from 90% then 25A then 15A then 7A as it gets closer to 100% and eventually 0A.

Hello Everyone

Have a luxpower 5kva inverter with two 100amp  elfbulb batteries which have been working well for 14 months until late december then on the lcd screen the BMS anolog showed TCP failure . I have switched off batteries right away and have trying to figure out why TCP failure on BMS . Advice from factory has been hard. Question should the BMS be replaced. There is a scp fuse on bms board but where and Does Anyone had this happen to their Solar system

Any advice would be appreciatted

Regards Chris home Cowies Hill Pinetown

[email protected]