Modbus comms with (Deye) inverter

brandaris · Aug 30, 2022

Hi,

I've recently purchased a Deye 6kW hybrid inverter and would like to control it using a raspberry PI.

I am experienced using Python but I've never used the Modbus protocol before to read/write data to/from the inverter. I received the modbus documents from Deye itself containing all relevant information. But as it is mostly in Chinese or badly translated English, understanding it is not easy.

Do you have any experience doing this? Or perhaps know where to find some working code for a Deye inverter?

Thanks in advance.

SolarNovice88 · Sep 4, 2022

Hi,
Have a look in this thread: https://powerforum.co.za/topic/8451-sunsynk-inverter-monitoring/

They have had success with node-red reading and writing modbus registers for Deye/sunsynk inverters

cods4 · Sep 6, 2022

brandaris said:
Hi,

I've recently purchased a Deye 6kW hybrid inverter and would like to control it using a raspberry PI.

I am experienced using Python but I've never used the Modbus protocol before to read/write data to/from the inverter. I received the modbus documents from Deye itself containing all relevant information. But as it is mostly in Chinese or badly translated English, understanding it is not easy.

Do you have any experience doing this? Or perhaps know where to find some working code for a Deye inverter?

Thanks in advance.

Any chance you could share the modbus protocol doc you received from Deye? I just want to check that it matches the one I have from Sunsynk.

I have communications working with my Deye inverter back to Homeassistant. This should let me control certain settings of the inverter, but I haven't tried that yet.
I am using the Sunsynk add-on for home assistant https://github.com/kellerza/sunsynk and a modbus RTU to eth (modbus tcp) converter.

brandaris · Sep 6, 2022

Yes of course,

Could you indicate if you found any differences?

According to Deye, you should be able to control all inverter settings via modbus.

cods4 · Sep 7, 2022

brandaris said:
Yes of course,

Could you indicate if you found any differences?

According to Deye, you should be able to control all inverter settings via modbus.

Thanks for that. The one I have for the Sunsynk is exactly the same, except that your version is a newer revision with a few minor changes.

houseofancients · Sep 7, 2022

cods4 said:
Thanks for that. The one I have for the Sunsynk is exactly the same, except that your version is a newer revision with a few minor changes.

that is because sunsynk, deye and sol-arl are the same

Swing · Apr 14, 2023

Has anybody succeeded in setting the grid setpoint? Meaning that you control the amount of energy going through the grid connection? Either exporting or importing, controlled by your own software rather than the working mode of the Deye/Sunsynk/Sol-arl?
I read the register list, but I cannot really tell from there how to do it.

Pe-Ro · Apr 26, 2023

Hello,

I have the same problem as you because modbus table from Deye is in bad English translation.
I bought this RS 485 converter and with help from my colleague who understands modbus better then me we find some useful data.
Converter: USR-TCP232-410s RS232 / RS485 Serial to Ethernet Adapter/IP Device Server Ethernet Converter Support DHCP/DNS
Table:

Modbus addres DEYE= 1;port 502

ADDRESS	REGISTER MEANING	UNIT	DESCRIPTION
598	U GRID L1	V	Napetost omrežja faza 1
599	U GRID L2	V	Napetost omrežja faza 2
600	U GRID L3	V	Napetost omrežja faza 3

604	P GRID LD L1	W	Moč na tokovnem transformatorju v inverterju faza 1
605	P GRID LD L2	W	Moč na tokovnem transformatorju v inverterju faza 2
606	P GRID LD L3	W	Moč na tokovnem transformatorju v inverterju faza 3
607	P GRID LD TOTAL	W	Skupna moč s tokovnih transformatorjev v inverterju

616	P GRID CT L1	W	Moč na tokovnem transformatorju zunaj inverterja faza 1
617	P GRID CT L2	W	Moč na tokovnem transformatorju zunaj inverterja faza 2
618	P GRID CT L3	W	Moč na tokovnem transformatorju zunaj inverterja faza 3
619	P GRID CT TOTAL	W	Skupna moč s tokovnih transformatorjev zunaj inverterja

627	U BACKUP LOAD L1	V	Napetost iz razsmernika faza 1
628	U BACKUP LOAD L2	V	Napetost iz razsmernika faza 2
629	U BACKUP LOAD L3	V	Napetost iz razsmernika faza 3

651	P BACKUP LOAD L1	W	Moč na razsmerniku faza 1
652	P BACKUP LOAD L2	W	Moč na razsmerniku faza 2
653	P BACKUP LOAD L3	W	Moč na razsmerniku faza 3

212	BATT CHARGE LIMIT CURRENT	A	Omejetev moči polnenja baterije
213	BATT DISCHARGE LIMIT CURRENT	A	Omejetev moči praznenja baterije
214	BATT DIS/CHARGE PERCENTAGE	%	Status napolnjenosti baterije
215	U BATT	V	Napetost baterije
216	I BATT (+/-)	A	Tok polnjenja/praznenja baterije

672	P PV1 (string 1)	W	Moč fotovoltaičnih modulov string 1
673	P PV2 (string 2)	W	Moč fotovoltaičnih modulov string 2
676	U PV1	V	Napetost fotovoltaičnih modulov string 1
677	I PV1	A	Tok fotovoltaičnih modulov string 1
678	U PV2	V	Napetost fotovoltaičnih modulov string 2
679	I PV2	A	Tok fotovoltaičnih modulov string 2

Description is in my language (Slovenian) everything else I write in English.

If someone read's more data please complete table.

This table is for Deye 12K-SG04LP3 (on modbus port pin 7 and 8)

Kind regards. Peter

badwajzr · May 2, 2023

@Pe-Ro do you have any new data? Writing values to the register, gridcharge, etc.

Thanks a lot

Pe-Ro · Jul 14, 2023

@ badwajzr no I don't have new data. Only one I found.

590

P BATT (+/-)

W

Moč polnenja/prazneja baterije (+polnenje; -praznenje)

This is power in watts which goes in or out of battery.

I'm still looking to find battery temperature and inverter heat sink temperature because of safety reasons.

Kind regards. Peter

Pe-Ro · Jul 30, 2023

Hello,

In zip is modbus table which is OK and it's works for my inverter (Deye SUN 12K-SG04LP3). Inside it's word file.

Kind regards. Peter

Hieu Tran · Sep 18, 2023

Pe-Ro said:
Hello,

I have the same problem as you because modbus table from Deye is in bad English translation.
I bought this RS 485 converter and with help from my colleague who understands modbus better then me we find some useful data.
Converter: USR-TCP232-410s RS232 / RS485 Serial to Ethernet Adapter/IP Device Server Ethernet Converter Support DHCP/DNS
Table:

Modbus addres DEYE= 1;port 502
ADDRESS REGISTER MEANING UNIT DESCRIPTION
598 U GRID L1 V Napetost omrežja faza 1
599 U GRID L2 V Napetost omrežja faza 2
600 U GRID L3 V Napetost omrežja faza 3
604 P GRID LD L1 W Moč na tokovnem transformatorju v inverterju faza 1
605 P GRID LD L2 W Moč na tokovnem transformatorju v inverterju faza 2
606 P GRID LD L3 W Moč na tokovnem transformatorju v inverterju faza 3
607 P GRID LD TOTAL W Skupna moč s tokovnih transformatorjev v inverterju
616 P GRID CT L1 W Moč na tokovnem transformatorju zunaj inverterja faza 1
617 P GRID CT L2 W Moč na tokovnem transformatorju zunaj inverterja faza 2
618 P GRID CT L3 W Moč na tokovnem transformatorju zunaj inverterja faza 3
619 P GRID CT TOTAL W Skupna moč s tokovnih transformatorjev zunaj inverterja
627 U BACKUP LOAD L1 V Napetost iz razsmernika faza 1
628 U BACKUP LOAD L2 V Napetost iz razsmernika faza 2
629 U BACKUP LOAD L3 V Napetost iz razsmernika faza 3
651 P BACKUP LOAD L1 W Moč na razsmerniku faza 1
652 P BACKUP LOAD L2 W Moč na razsmerniku faza 2
653 P BACKUP LOAD L3 W Moč na razsmerniku faza 3
212 BATT CHARGE LIMIT CURRENT A Omejetev moči polnenja baterije
213 BATT DISCHARGE LIMIT CURRENT A Omejetev moči praznenja baterije
214 BATT DIS/CHARGE PERCENTAGE % Status napolnjenosti baterije
215 U BATT V Napetost baterije
216 I BATT (+/-) A Tok polnjenja/praznenja baterije
672 P PV1 (string 1) W Moč fotovoltaičnih modulov string 1
673 P PV2 (string 2) W Moč fotovoltaičnih modulov string 2
676 U PV1 V Napetost fotovoltaičnih modulov string 1
677 I PV1 A Tok fotovoltaičnih modulov string 1
678 U PV2 V Napetost fotovoltaičnih modulov string 2
679 I PV2 A Tok fotovoltaičnih modulov string 2

Description is in my language (Slovenian) everything else I write in English.

If someone read's more data please complete table.

This table is for Deye 12K-SG04LP3 (on modbus port pin 7 and 8)

Kind regards. Peter

I connect to the modbus port but cannot communicate, or do I have to connect to another port?

Pe-Ro · Sep 24, 2023

Hello,

I used a 'modebus' port on deye inverter.

Kind regards. Peter

zatorrent · Oct 6, 2023

Pe-Ro said:
Hello,

I have the same problem as you because modbus table from Deye is in bad English translation.
I bought this RS 485 converter and with help from my colleague who understands modbus better then me we find some useful data.
Converter: USR-TCP232-410s RS232 / RS485 Serial to Ethernet Adapter/IP Device Server Ethernet Converter Support DHCP/DNS
Table:

Modbus addres DEYE= 1;port 502
ADDRESS REGISTER MEANING UNIT DESCRIPTION
598 U GRID L1 V Napetost omrežja faza 1
599 U GRID L2 V Napetost omrežja faza 2
600 U GRID L3 V Napetost omrežja faza 3
604 P GRID LD L1 W Moč na tokovnem transformatorju v inverterju faza 1
605 P GRID LD L2 W Moč na tokovnem transformatorju v inverterju faza 2
606 P GRID LD L3 W Moč na tokovnem transformatorju v inverterju faza 3
607 P GRID LD TOTAL W Skupna moč s tokovnih transformatorjev v inverterju
616 P GRID CT L1 W Moč na tokovnem transformatorju zunaj inverterja faza 1
617 P GRID CT L2 W Moč na tokovnem transformatorju zunaj inverterja faza 2
618 P GRID CT L3 W Moč na tokovnem transformatorju zunaj inverterja faza 3
619 P GRID CT TOTAL W Skupna moč s tokovnih transformatorjev zunaj inverterja
627 U BACKUP LOAD L1 V Napetost iz razsmernika faza 1
628 U BACKUP LOAD L2 V Napetost iz razsmernika faza 2
629 U BACKUP LOAD L3 V Napetost iz razsmernika faza 3
651 P BACKUP LOAD L1 W Moč na razsmerniku faza 1
652 P BACKUP LOAD L2 W Moč na razsmerniku faza 2
653 P BACKUP LOAD L3 W Moč na razsmerniku faza 3
212 BATT CHARGE LIMIT CURRENT A Omejetev moči polnenja baterije
213 BATT DISCHARGE LIMIT CURRENT A Omejetev moči praznenja baterije
214 BATT DIS/CHARGE PERCENTAGE % Status napolnjenosti baterije
215 U BATT V Napetost baterije
216 I BATT (+/-) A Tok polnjenja/praznenja baterije
672 P PV1 (string 1) W Moč fotovoltaičnih modulov string 1
673 P PV2 (string 2) W Moč fotovoltaičnih modulov string 2
676 U PV1 V Napetost fotovoltaičnih modulov string 1
677 I PV1 A Tok fotovoltaičnih modulov string 1
678 U PV2 V Napetost fotovoltaičnih modulov string 2
679 I PV2 A Tok fotovoltaičnih modulov string 2

Description is in my language (Slovenian) everything else I write in English.

If someone read's more data please complete table.

This table is for Deye 12K-SG04LP3 (on modbus port pin 7 and 8)

Kind regards. Peter

There is a pretty easy to read definition file at https://github.com/StephanJoubert/h...larman/inverter_definitions/deye_sg04lp3.yaml

oplocky · Oct 24, 2023

I'm looking for a solution to use excess energy, so I have so far activated MODBUS on LK3/4 from www.tinycontrol.pl
ATTENTION LK4 is still in development and waiting for firmware, version 3.8 is usable, MODBUS module must be purchased

oplocky · Oct 24, 2023

Metric	Modbus address	MQTT topic suffix	Unit
PV1 Power	672	dc/pv1/power	W
PV2 Power	673	dc/pv2/power	W
PV1 Voltage	676	dc/pv1/voltage	V
PV2 Voltage	678	dc/pv2/voltage	V
PV1 Current	677	dc/pv1/current	A
PV2 Current	679	dc/pv2/current	A
Daily Production	529	day_energy	kWh
Total Production	534,535	total_energy	kWh
Total Grid Power	625	ac/total_power	W

Grid Voltage L1	598	ac/l1/voltage	V
Grid Voltage L2	599	ac/l2/voltage	V
Grid Voltage L3	600	ac/l3/voltage	V
Internal CT L1 Power	604	ac/l1/ct/internal	W
Internal CT L2 Power	605	ac/l2/ct/internal	W
Internal CT L3 Power	606	ac/l3/ct/internal	W
Total active IN Power	607	Ac/active IN Power	W
External CT L1 Power	616	ac/l1/ct/external	W
External CT L2 Power	617	ac/l2/ct/external	W
External CT L3 Power	618	ac/l3/ct/external	W
Daily Energy Bought	520	ac/daily_energy_bought	kWh
Total Energy Bought	522,523	ac/total_energy_bought	kWh
Daily Energy Sold	521	ac/daily_energy_sold	kWh
Total Energy Sold	524,525	ac/total_energy_sold	kWh
Day Load Power	526	Ac/day load power	kWh
GridSell Power	525	Ac/total gridsell	kWh
Gen Port Power	667	Ac/total pover gen port	W
Current L1	630	ac/l1/current	A
Current L2	631	ac/l2/current	A
Current L3	632	ac/l3/current	A
Inverter L1 Power	633	ac/l1/power	W
Inverter L2 Power	634	ac/l2/power	W
Inverter L3 Power	635	ac/l3/power	W
DC Temperature	540	radiator_temp	°C
AC Temperature	541	ac/temperature	°C
Daily Battery Charge	514	battery/daily_charge	kWh
Daily Battery Discharge	515	battery/daily_discharge	kWh
Total Battery Charge	516,517	battery/total_charge	kWh
Total Battery Discharge	518,519	battery/total_discharge	kWh
Battery Power	590	battery/power	W
Battery Voltage	587	battery/voltage	V
Battery SOC	588	battery/soc	%
Battery Current	591	battery/current	A
Battery Temperature	586	battery/temperature	°C
Total Load Power	653	ac/ups/total_power	W
Load L1 Power	650	ac/ups/l1/power	W
Load L2 Power	651	ac/ups/l2/power	W
Load L3 Power	652	ac/ups/l3/power	W
Load Voltage L1	644	ac/ups/l1/voltage	V
Load Voltage L2	645	ac/ups/l2/voltage	V
Load Voltage L3	646	ac/ups/l3/voltage	V
Daily Load Consumption	526	ac/ups/daily_energy	kWh
Total Load Consumption	527,528	ac/ups/total_energy	kWh

Pe-Ro · Nov 3, 2023

Hello,

Nice job ''oplocky''.

oplocky · Nov 8, 2023

Pe-Ro said:
Hello,

Nice job ''oplocky''.

HELLO
I don't come here very often
contact email
oplockyj@gmail.com

hasant73 · Nov 28, 2023

What is the difference between Internal CT and External CT?
I guess the external CT's are the one you put into your switch board.
But what are the internal CT's showing?

festr · Jan 11, 2024

Hello,

I have SUN-50K-SxG01HP3-EU-BM4 which has two battery towers with two BMS. Registry for the first battery packs fits but I just cant find registry for the second BMS2 and battery2 - any thoughts? (I'm using logger to solarmanpv.com and I can see BMS and BMS2 just cannot find any specification for the second battery anywhere)

Pe-Ro · Jan 21, 2024

Hello,
'festr' did you try to look whole modbus table with 'modbus poll' software? When you see all of numbers and addresses you will probly find data for other BMS.

'hasan73' the difference between internal CT and extrnal CT is if you look deye data sheet (shematic picture) you will see that internal CT is measuring UPS load (backup) power and extrnal is on grid and comsumption of devices that you have connected on grid.

Kind regards. Peter

thomas37 · Feb 18, 2024

Pe-Ro said:
Hello,

I have the same problem as you because modbus table from Deye is in bad English translation.
I bought this RS 485 converter and with help from my colleague who understands modbus better then me we find some useful data.
Converter: USR-TCP232-410s RS232 / RS485 Serial to Ethernet Adapter/IP Device Server Ethernet Converter Support DHCP/DNS
Table:

Modbus addres DEYE= 1;port 502
ADDRESS REGISTER MEANING UNIT DESCRIPTION
598 U GRID L1 V Napetost omrežja faza 1
599 U GRID L2 V Napetost omrežja faza 2
600 U GRID L3 V Napetost omrežja faza 3
604 P GRID LD L1 W Moč na tokovnem transformatorju v inverterju faza 1
605 P GRID LD L2 W Moč na tokovnem transformatorju v inverterju faza 2
606 P GRID LD L3 W Moč na tokovnem transformatorju v inverterju faza 3
607 P GRID LD TOTAL W Skupna moč s tokovnih transformatorjev v inverterju
616 P GRID CT L1 W Moč na tokovnem transformatorju zunaj inverterja faza 1
617 P GRID CT L2 W Moč na tokovnem transformatorju zunaj inverterja faza 2
618 P GRID CT L3 W Moč na tokovnem transformatorju zunaj inverterja faza 3
619 P GRID CT TOTAL W Skupna moč s tokovnih transformatorjev zunaj inverterja
627 U BACKUP LOAD L1 V Napetost iz razsmernika faza 1
628 U BACKUP LOAD L2 V Napetost iz razsmernika faza 2
629 U BACKUP LOAD L3 V Napetost iz razsmernika faza 3
651 P BACKUP LOAD L1 W Moč na razsmerniku faza 1
652 P BACKUP LOAD L2 W Moč na razsmerniku faza 2
653 P BACKUP LOAD L3 W Moč na razsmerniku faza 3
212 BATT CHARGE LIMIT CURRENT A Omejetev moči polnenja baterije
213 BATT DISCHARGE LIMIT CURRENT A Omejetev moči praznenja baterije
214 BATT DIS/CHARGE PERCENTAGE % Status napolnjenosti baterije
215 U BATT V Napetost baterije
216 I BATT (+/-) A Tok polnjenja/praznenja baterije
672 P PV1 (string 1) W Moč fotovoltaičnih modulov string 1
673 P PV2 (string 2) W Moč fotovoltaičnih modulov string 2
676 U PV1 V Napetost fotovoltaičnih modulov string 1
677 I PV1 A Tok fotovoltaičnih modulov string 1
678 U PV2 V Napetost fotovoltaičnih modulov string 2
679 I PV2 A Tok fotovoltaičnih modulov string 2

Description is in my language (Slovenian) everything else I write in English.

If someone read's more data please complete table.

This table is for Deye 12K-SG04LP3 (on modbus port pin 7 and 8)

Kind regards. Peter

Hello, I'm in a similar situation, I have a 12kW model where there is an RJ45 MODEBUS connector, where I connected pins 7 and 8 but it still doesn't read anything, I tried e.g. Battery SOC with this command: MODBUSR(H, 0x03, Int16)/588
I don't know if this is correct.

Can you advise me, thanks

houseofancients · Feb 18, 2024

thomas37 said:
Hello, I'm in a similar situation, I have a 12kW model where there is an RJ45 MODEBUS connector, where I connected pins 7 and 8 but it still doesn't read anything, I tried e.g. Battery SOC with this command: MODBUSR(H, 0x03, Int16)/588
I don't know if this is correct.

Can you advise me, thanks

Did you set the battery to lithium and enabled comms ?
If not, the BMS port will be disabled

thomas37 · Feb 18, 2024

houseofancients said:
Did you set the battery to lithium and enabled comms ?
If not, the BMS port will be disabled

Yes, the battery is set to lithium, but I cant found menu where is "enabled comms"

houseofancients · Feb 18, 2024

thomas37 said:
Yes, the battery is set to lithium, but I cant found menu where is "enabled comms"

When you set lithium you need to set a protocol.
Furthermore, have you tried swapping 7 and 8 ?
Some adapters (ch314 mostly ) have swapped it

Modbus comms with (Deye) inverter

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@Pe-Ro do you have any new data? Writing values to the register, gridcharge, etc.​

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Thanks a lot​

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@Pe-Ro do you have any new data? Writing values to the register, gridcharge, etc.

Thanks a lot