GoodWe grid-tied inverter

Register map(s) for this device, each at the trust rung it earned. Addresses are 0-based as on the wire. Word order and scaling are confirmed at the hardware-verified rung and at no rung below it.

interop-verified

Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.

point	address (0-based)	type	scale	unit
power_on_voltage	0	U16	0.1	V
reconnect_time	1	U16	1	s
lower_limit_of_grid_voltage	2	U16	0.1	V
upper_limit_of_grid_voltage	3	U16	0.1	V
lower_limit_of_grid_frequency	4	U16	0.01	Hz
upper_limit_of_grid_frequency	5	U16	0.01	Hz
active_power_adjust	256	U16	1	%
pf_reactive_power_adjust	257	U16	1	%
reactive_power_adjust	258	U32BE	1	Var
max_value_of_reactive_power	260	U32BE	1	Var
vpv1_input_voltage	768	U16	0.1	V
vpv2_input_voltage	769	U16	0.1	V
ipv1_input_current	770	U16	0.1	A
ipv2_input_current	771	U16	0.1	A
vac1_l1_phase_voltage	772	U16	0.1	V
vac2_l2_phase_voltage	773	U16	0.1	V
vac3_l3_phase_voltage	774	U16	0.1	V
iac1_l1_phase_current	775	U16	0.1	A
iac2_l2_phase_current	776	U16	0.1	A
iac3_l3_phase_current	777	U16	0.1	A
fac1_l1_phase_frequency	778	U16	0.01	Hz
fac2_l2_phase_frequency	779	U16	0.01	Hz
fac3_l3_phase_frequency	780	U16	0.01	Hz
pac_l_inverter_current_output_power	781	U16	1	W
work_mode	782	U16	1
inverter_internal_temperature	783	U16	0.1	°C
error_message_h	784	U16	1
error_message_l	785	U16	1
high_byte_total_feed_power	786	U16	0.1	kWh
low_byte_total_feed_power	787	U16	0.1	kWh
high_byte_total_feeding_hours	788	U16	1	h
low_byte_total_feeding_hours	789	U16	1	h
bus_voltage	796	U16	0.1	V
nbus_voltage	797	U16	0.1	V
feed_power_to_grid_today	800	U16	0.1	kWh
vpv5_input_voltage	804	U16	0.1	V
ipv5_input_current	805	U16	0.1	V
vpv6_input_voltage	806	U16	0.1	A
ipv6_input_current	807	U16	0.1	A
wireless_signal_strength	831	U16	1	%
pac_h_high_byte_of_power	854	U16	1	W
vpv3_input_voltage	855	U16	0.1	V
vpv4_input_voltage	856	U16	0.1	V
ipv3_input_current	857	U16	0.1	A
ipv4_input_current	858	U16	0.1	A
istr1_pv_string1_current	859	U16	0.1	A
istr2_pv_string2_current	860	U16	0.1	A
istr3_pv_string3_current	861	U16	0.1	A
istr4_pv_string4_current	862	U16	0.1	A
istr5_pv_string5_current	863	U16	0.1	A
istr6_pv_string6_current	864	U16	0.1	A
istr7_pv_string7_current	865	U16	0.1	A
istr8_pv_string8_current	866	U16	0.1	A
power_factor	886	U16	0.001
high_byte_ac_reactive_power	893	U16	0.001	kvar
low_byte_ac_reactive_power	894	U16	0.001	kvar
leak_current_value	896	U16	1	mA
current_r_phase_size	1000	U32BE	0.1	0.1 A
current_s_phase_size	1002	U32BE	0.1	0.1 A
current_t_phase_size	1004	U32BE	0.1	0.1 A
voltage_r_phase_size	1006	U32BE	0.1	0.1 V
voltage_s_phase_size	1008	U32BE	0.1	0.1 V
voltage_t_phase_size	1010	U32BE	0.1	0.1 V
three_phase_effective_power	1012	U32BE	0.1	0.1 kW
three_phase_ineffective_power	1014	U32BE	1	Var
three_phase_force_rate	1016	U32BE	0.001	0.001
frequency	1018	U32BE	0.1	0.1 Hz
status_flag1	1020	U32BE	1

link settings as documented (unverified): RTU; default 9600 8N2; unit ID 247; FC 03,16

bench facts as documented (unverified)

protocol notes	RTC time should be written together.
model register	528
serial register	512
firmware register	790

field reports — community-sourced, unverified (checked 2026-06-11)

On some integration platforms (like LogicMachine), users may need to shift register addresses by -1 (off-by-one) to read the correct registers. [source]
The Home Assistant integration reports that some energy measurements (Today Energy export/import, Today Load, Total Energy export/import, Total Load) are returned with incorrect scaling/units (diverting by a factor of 3.6) on certain inverters like the GW15K-ET. [source]
On newer G2 models (like SBP G2), the manufacturer changed the Modbus register mappings without updating the public documentation, shifting the serial number register from 0x0200 (512) to 0x07D0 (2000). [source]
confirmed: comms default baud rate is 9600 — confirmed by GoodWe Modbus Protocol of Inverter document stating 'Baud Rate of Communication：9600bps' [2.1.1]
confirmed: comms default unit ID is 247 — confirmed by GoodWe Modbus Protocol of Inverter document stating 'The range of device address is 1 – 247 with 247 as default setting before delivery.'
confirmed: comms framing is RTU — confirmed by GoodWe Modbus Protocol of Inverter document stating 'RTU mode is applied in this protocol.'
confirmed: comms stop bits is 2 — confirmed by GoodWe Modbus Protocol of Inverter document stating 'no parity, 2 Stopbits'
confirmed: firmware_register is 790 — confirmed by GoodWe Modbus Protocol of Inverter document listing register 790 as 'Firmware Version'
confirmed: model_register is 528 — confirmed by GoodWe Modbus Protocol of Inverter document listing register 528 as 'Device Type'
confirmed: serial_register is 512 — confirmed by GoodWe Modbus Protocol of Inverter document listing register 512 as 'Device Serial Number'
confirmed: RTC time should be written together — confirmed by GoodWe Modbus Protocol of Inverter document stating '10H: write (Note: RTC time should be written together.)'

The trust ladder

Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.

generated — A prompt produced it. Unproven — anyone can regenerate this.
structure-verified — Decode path is structurally sound (addresses, widths, finite values). Does NOT prove word order or scaling.
interop-verified — Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.
simulator-verified — Decoded correctly against a protocol emulator seeded with known-true values — catches word-order/scaling errors vs the emulator, not the physical device.
hardware-verified x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

If your device isn't here, upload its register map. Generation is free, and the connector keeps the rung it earns under testing.

To prove a connector against your own device, order hardware verification. If it doesn't verify, you don't pay.

Platform builders can license the verified library: machine-readable maps, the firmware matrix, API access.