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Noob needs help with Deye 8kW inverter battery settings for 2x Shoto 5.12kWh batteries


Ant97

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Hi everyone,

We recently had a grid-tied solar system installed about 3 weeks ago comprising of a Deye 8kW inverter with 2x Shoto SDC10-Box 5 5.12kWh batteries. Everything was going smoothly until City Power maintenance meant we had no Eskom yesterday for at least 24 hours until this morning. Hence, we woke up with no power from the inverter and batteries with 0% charge which can't be healthy for them and led me to question the installer's battery settings as I had thought the inverter would've been set to shutdown at a battery SOC of like 20%. The current battery settings are attached as images and as I am very much a solar noob, I would greatly appreciate any advice regarding suitable settings as my installer is not being much help.

The first thing I noticed is battery mode is set to "use battery voltage" and not "Lithium". Surely it should be set to "Lithium" since these are Lithium-ion batteries, but just checking if it works correctly with these batteries as I read some posts about some Shoto batteries BMS being incompatible with Deye inverters? If set to "Lithium", will it then automatically obtain all voltage settings from the battery BMS e.g. float V, equalization V etc? Also, does anyone know what Lithium mode number is suitable for these batteries or will 00 work fine?

Secondly, for charge and discharge current, the charge current is set to 40A which is lower than the 50A recommended in the user manual but seems to be good for prolonging battery life according to what I've read, correct me if I am mistaken. Discharge current on the other hand seems high at 185A, should it be lower or the same as charge current?

Lastly, the shutdown, low batt alarm and restart settings are all voltages which is not very intuitive to my noobiness and seems to be incorrectly set since the batteries drained to zero (no time of use settings have been set yet). Could anyone explain how the voltages correlate to SOC? I will change battery mode to "use batt %" if "lithium" doesn't work to be more intuitive but I am just interested to know how one would identify a suitable shutdown voltage for the batteries.

I'm just looking to avoid a repeat and prolong the life of the batteries so if anything else looks weird in the settings please let me know.

Thanks in advance for any help which will be greatly appreciated.

 

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49 minutes ago, Ant97 said:

Hi everyone,

We recently had a grid-tied solar system installed about 3 weeks ago comprising of a Deye 8kW inverter with 2x Shoto SDC10-Box 5 5.12kWh batteries. Everything was going smoothly until City Power maintenance meant we had no Eskom yesterday for at least 24 hours until this morning. Hence, we woke up with no power from the inverter and batteries with 0% charge which can't be healthy for them and led me to question the installer's battery settings as I had thought the inverter would've been set to shutdown at a battery SOC of like 20%. The current battery settings are attached as images and as I am very much a solar noob, I would greatly appreciate any advice regarding suitable settings as my installer is not being much help.

The first thing I noticed is battery mode is set to "use battery voltage" and not "Lithium". Surely it should be set to "Lithium" since these are Lithium-ion batteries, but just checking if it works correctly with these batteries as I read some posts about some Shoto batteries BMS being incompatible with Deye inverters? If set to "Lithium", will it then automatically obtain all voltage settings from the battery BMS e.g. float V, equalization V etc? Also, does anyone know what Lithium mode number is suitable for these batteries or will 00 work fine?

Secondly, for charge and discharge current, the charge current is set to 40A which is lower than the 50A recommended in the user manual but seems to be good for prolonging battery life according to what I've read, correct me if I am mistaken. Discharge current on the other hand seems high at 185A, should it be lower or the same as charge current?

Lastly, the shutdown, low batt alarm and restart settings are all voltages which is not very intuitive to my noobiness and seems to be incorrectly set since the batteries drained to zero (no time of use settings have been set yet). Could anyone explain how the voltages correlate to SOC? I will change battery mode to "use batt %" if "lithium" doesn't work to be more intuitive but I am just interested to know how one would identify a suitable shutdown voltage for the batteries.

I'm just looking to avoid a repeat and prolong the life of the batteries so if anything else looks weird in the settings please let me know.

Thanks in advance for any help which will be greatly appreciated.

 

You should be using battery set to lithium and on CAN communication. Then you need a network cable from inverter BMS CAN port to master shoto CAN port. Then a network cable between master and slave batteries RS485 ports. 

Dip switches as follows. 

Master dip 5 set to ON. 

Slave dip 1 set to ON. 

This should automatically send voltages and SOC to the inverter. Deye works great with shoto batteries. 

You can then set shutdown to 15% and low batt warning to 20% and restart at 30%

Edited by Chris_S
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47 minutes ago, Ant97 said:

Hi everyone,

We recently had a grid-tied solar system installed about 3 weeks ago comprising of a Deye 8kW inverter with 2x Shoto SDC10-Box 5 5.12kWh batteries. Everything was going smoothly until City Power maintenance meant we had no Eskom yesterday for at least 24 hours until this morning. Hence, we woke up with no power from the inverter and batteries with 0% charge which can't be healthy for them and led me to question the installer's battery settings as I had thought the inverter would've been set to shutdown at a battery SOC of like 20%. The current battery settings are attached as images and as I am very much a solar noob, I would greatly appreciate any advice regarding suitable settings as my installer is not being much help.

The first thing I noticed is battery mode is set to "use battery voltage" and not "Lithium". Surely it should be set to "Lithium" since these are Lithium-ion batteries, but just checking if it works correctly with these batteries as I read some posts about some Shoto batteries BMS being incompatible with Deye inverters? If set to "Lithium", will it then automatically obtain all voltage settings from the battery BMS e.g. float V, equalization V etc? Also, does anyone know what Lithium mode number is suitable for these batteries or will 00 work fine?

Secondly, for charge and discharge current, the charge current is set to 40A which is lower than the 50A recommended in the user manual but seems to be good for prolonging battery life according to what I've read, correct me if I am mistaken. Discharge current on the other hand seems high at 185A, should it be lower or the same as charge current?

Lastly, the shutdown, low batt alarm and restart settings are all voltages which is not very intuitive to my noobiness and seems to be incorrectly set since the batteries drained to zero (no time of use settings have been set yet). Could anyone explain how the voltages correlate to SOC? I will change battery mode to "use batt %" if "lithium" doesn't work to be more intuitive but I am just interested to know how one would identify a suitable shutdown voltage for the batteries.

I'm just looking to avoid a repeat and prolong the life of the batteries so if anything else looks weird in the settings please let me know.

Thanks in advance for any help which will be greatly appreciated.

 

The 40A charge is probably for grid charging. Solar you can up the amps if you like. 

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  • 1 month later...

Hi All

I have a Kodak 5kv inverter and 2 Shoto 5.12Kw batteries. They have been installed without any communication cables between the inverter and batteries or between the batteries themselves. They have simply been installed in parallel with the inverter. The inverter battery type is set to User Defined and the settings set to the Shoto manual recommended settings.  The installer indicated that there was no communication protocols available for the Kodak/Shoto combination.  The installation seems to be working well and is already over a year old.

Is there any disadvantage to using this setup without communication between the inverter and the battery BMS?

Thanks

Colin

 

 

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  • 3 weeks later...

I have a problem with the BMS settings for my deye inverter with 2 x Akkutech 5.12kW batteries. Does anyone know the settings for this for the Comms between the inverter and the batteries. I connected the CAN port on the inverter to the CAN port on the battery and it seems to work but I dont have a comms cable between the master and slave battery. Do I need this and what settings ie dipswitches do I need to set?

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20 minutes ago, Stu_D said:

I have a problem with the BMS settings for my deye inverter with 2 x Akkutech 5.12kW batteries. Does anyone know the settings for this for the Comms between the inverter and the batteries. I connected the CAN port on the inverter to the CAN port on the battery and it seems to work but I dont have a comms cable between the master and slave battery. Do I need this and what settings ie dipswitches do I need to set?

Yes, you need the cable between batteries so the inverter can see the total capacity and changing/discharging current.

I don't know your batteries so I'm not sure of the dip settings, but some of them work without any changes. Give it a try with a regular lan cable between the two. You can experiment a bit with the dip settings without damaging anything, you may just have to revert back to the original if you can't get it working. You will need to reboot the battery after dip settings changes.

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53 minutes ago, jumper said:

Yes, you need the cable between batteries so the inverter can see the total capacity and changing/discharging current.

I don't know your batteries so I'm not sure of the dip settings, but some of them work without any changes. Give it a try with a regular lan cable between the two. You can experiment a bit with the dip settings without damaging anything, you may just have to revert back to the original if you can't get it working. You will need to reboot the battery after dip settings changes.

I spoke to the supplier and they said I only need to change the dip switches and dont need the LAN cable between the two batteries. Does this make sense?

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22 hours ago, Stu_D said:

I spoke to the supplier and they said I only need to change the dip switches and dont need the LAN cable between the two batteries. Does this make sense?

That makes no sense to me, the batteries need to communicate with each other. The dip settings just set the unique address for each battery on the network protocol. The master needs to see the slave to tell the inverter the total battery capacity etc.

The only way it could work without a cable is if the batteries have wifi, but I have never seen that before and I seriously doubt it.

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51 minutes ago, Stu_D said:

I connected the batteries together with a LAN cable between the RS485 ports. Couldnt see much difference but all seems to be working still.

You should see a difference in total capacity and max charge and discharge values on the inverter, they should have doubled. I'm not familiar with the Deye interface and how much battery info it gives and if you can see individual batteries.

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