Deye 1Ph LV - single-phase hybrid inverter

Description

Device class: single-phase hybrid inverter
Battery: 48 V class lithium, 51.2 V nominal, 16 cells
Brands: Deye and Sunsynk, with one protocol and one installation procedure
Name in My Devices: Deye 1Ph LV
Nameplate on the Info tab: SUN-12K-LP1, where the number is the rated power in kW. Old firmware that does not report the rated power shows SUN-LP1.

LoggerV Connection

Interface	Protocol	Port or baud rate
RS-485	Modbus RTU	LoggerV port Bus Speed
RS-232	Modbus RTU	LoggerV port Bus Speed
Ethernet	Modbus TCP	502 by default

Modbus address range scan: serial ports only, LoggerV firmware 9.269 or later

Plant Control Functions

Hybrid inverter with an off-grid switch:
- Battery dispatch: the power and the target state of charge of the six Time of Use time points
- Solar output cap: PV Power Limit, register 53, in W. Plant control reads the value back after each write.
Energy meter: the external CT reading, shown in plant control as <serial>_EM_0. This meter is always on.
Grid connection switch: <serial>-GRCP_SW. Open sets the inverter to off-grid mode. Close connects the inverter to the grid again.
Storage cluster (optional): Settings > Storage Cluster > Register Storage. The setting applies at the next device reload.
Reactive power: not implemented
Start and stop: plant control does not start or stop the inverter. Use On/Off on the device page.

Plant control writes the Time of Use schedule and PV Power Limit only when the Plant Control switch on Time of Use/Peak Shifting is on. The inverter then shows "Time of Use controlled by plant control". Plant control writes PV Power Limit when the cap changes. While a cap is active, plant control writes it again at least 10 seconds apart, to recover a lost write.

Use Register Storage only for a battery that the LoggerV cannot read directly. Do not switch it on for a Solar MD battery that has a direct connection to the LoggerV. The direct connection gives faster and more detailed battery data.

Recorded Data

Field	Unit
Storage Current	A
Storage Voltage	V
Grid Frequency	Hz
Load Frequency	Hz
DC Trans. Temperature	°C
Heatsink Temperature	°C

DC Trans. Temperature on the device page: DC Temperature
Heatsink Temperature on the device page: AC Temperature
Not recorded: all other values, for example run state, battery state of charge, power and energy. They show live on the device page only.
Sample period: one period for the full device
With Register Storage on: the platform also records the cluster capacity, voltage, current, charge limit and discharge limit, under the storage cluster

Reference Documents

These open in the myPower24 library. Sign in to read them. The device page also lists them under Documents.

Wiring

The Add-Device wizard makes the connection diagrams; see How to add a device in myPower24.

Monitoring port: the Modbus communication port
Not for monitoring: the BMS port, the meter or CT port, the parallel port
In the SUN-SGLP1 manual: RS-485 terminal labels and pinout, RS-232 pinout, bus termination, default Modbus address, LCD menu path for the Modbus address and the baud rate

Setup

Connect the communication cable as the generated diagram shows.
Add the device on the LoggerV; see How to add a device in myPower24. Select the Deye SUN-SGLP1 device type.
Set the port Bus Speed to the baud rate of the inverter.
Type the Modbus address of the inverter in Modbus Slave ID:.
If you do not know the address, click Try scan range.
Type a range (1-10) or a comma-separated list in Modbus Slave address begin:. Scan addresses are 1 to 254.
On the inverter, set a Modbus address that no other device on the bus uses.
On the inverter, set the baud rate to the port Bus Speed.
Set Settings > Setup > Grid Standard to the grid code of the country. The grid code sets the voltage limits, the frequency limits and the trip times.
Set up the battery at the two ends; see Battery Communication.
Open Actual Data. Make sure that Run State shows Normal. Make sure that Battery SOC, Inverter Power and Grid Power on the Status card change.

The LoggerV reads the identity registers at the address. It adds the inverter only if the reply comes from the single-phase low-voltage family.

Battery Communication

Link: CAN, battery to inverter directly
Charge control: BMS data, not a voltage curve
Protocol: the same at the two ends

Inverter Settings

Location: Settings > Battery on the inverter device page
Control Mode: Lithium Battery (register 200).
Lithium Battery Type: the BMS protocol number (register 325). 0 for a Solar MD battery. Used only when Control Mode is Lithium Battery.
Battery Capacity: pack rating, Ah
Max Charge Current: pack rating, A
Max Discharge Current: pack rating, A
Inverter LCD: also sets the battery protocol. The menu path is in the SUN-SGLP1 manual.

Deye device page, Settings then Battery, with Lithium Battery Type set to 0 for a Solar MD battery

Solar MD Battery Settings

Location: Settings > Installer > Control > Controlled Device Settings on the battery device page
Controlled Device: Sunsynk. There is no Deye entry, because Deye and Sunsynk use one protocol.
Full battery procedure: Li-ion Storage EX - battery

Device Page

Info:
- Identity: manufacturer, device name, install date, hardware version
- Firmware: Main Ctrl FW Version, Modbus Protocol Version, Bootloader Version, LCD FW Version
- Clock: inverter date and time
- Connection: Modbus connection details
- Nameplate card: rated power, MPPT count, battery count, grid standard
Actual Data (opens first): Status, Battery Data, Load Data, Grid Data, Inverter Output, Mppt Info, Aux / Generator, System Energy Totals, Temperature & Relay
Settings: Setup, Battery, Storage Cluster, Grid, Gen Port, Protection, Output. On/Off is at the bottom of Setup.
Time of Use/Peak Shifting: Plant Control switch, day enables, six time points (time, discharge power limit, cut-off battery voltage, target state of charge, charge source)
Plant Control SOC Limit: %, the state of charge where the inverter stops discharge, for all six time points. Battery Shutdown Capacity applies first if it is higher.
Plant Control Write Interval: ms, default 3000, range 1000 to 60000. The minimum time between two setpoint writes.
Healthy link: Run State: Normal on the Status card; Battery SOC, Inverter Power and Grid Power change
Run State values: Standby, Self-check, Normal, Alarm, Fault, Hard Fault
Grid events: "Grid connection lost", "Grid reconnected"
Relay status, Temperature & Relay card: Grid Port Relay Status and Gen Port Relay Status, Open or Closed

Troubleshooting

Inverter not found after a scan: the address, the baud rate or the wiring is wrong. Make sure that the baud rate and the port Bus Speed are the same. Scan the address that you set, or scan a range.
"Wrong Deye model family at Reg 0!": the unit is not a single-phase low-voltage inverter. Add a three-phase or high-voltage Deye under its own device type. The message gives the expected family code and the received family code.
"External CT clamp appears disconnected" (warning): external CT total 0 W for 60 polls in sequence, inverter on-grid, internal grid power above 50 W. Examine the CT clamp connection and its orientation. The warning clears when one of these three conditions stops, also with the clamp disconnected. The message gives the two grid power values that the check compared.
No battery or BMS data: set Control Mode to Lithium Battery and set the correct Lithium Battery Type. Set Controlled Device on the battery to Sunsynk. Then examine the CAN cable. A lost CAN link causes fault F58 Bat_Comms_Lost. If the pack is asleep, use Settings > Battery > Lithium Battery WakeUp.
"Failed to set:" and a setting name, on a Time of Use day switch: the inverter did not accept the write. Make sure that the inverter is online, then try again.
Battery power and current stop while the Plant Control switch is on: the inverter stops its live-data updates for a period after each write. Increase Plant Control Write Interval (Time of Use/Peak Shifting > Setup) above 3000 ms.
Register Storage has no effect: the setting applies at device reload. Reload the device.
Unknown fault code: the driver shows each inverter fault bit as an F-number and a name. Examples: F35 No_AC_Grid, F34 AC_Overload_Fault, F64 Heatsink_HighTemp_Fault, F61 Button_Manual_OFF, F29 Parallel_comm_Fault. Undocumented codes show as "F19 UNKOWN", misspelling included. Find the code in the inverter manual.

Permissions

Viewer: read the device page. The page shows View-only on this site.
Editor or higher: change all settings, the Time of Use schedule, the grid code, the protection limits and Factory Reset Enable
Advanced or OEM role: not needed on this device
"Permission denied! Required permission [basic].": the person does not have Editor or higher on the plant, or does not have the standard device role for this model
About the levels: see Access levels field definitions