Sol-Ark 12K/15K hybrid inverter (public read-only map)

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 only confirmed at the hardware-verified rung.

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
day_active_power	60	I16	0.1	0.1kWh
total_active_power	63	U32LE	0.1	0.1kWh
grid_frequency	79	U16	0.01	0.01Hz
dcdc_transformer_temperature	90	U16	0.1	0.1°C
igbt_heat_sink_temperature	91	U16	0.1	0.1°C
fault_information_word_1	103	U16	1
fault_information_word_2	104	U16	1
fault_information_word_3	105	U16	1
fault_information_word_4	106	U16	1
corrected_batt_capacity	107	U16	1	1AH
daily_pv_power	108	U16	0.1	0.1kWh
dc_voltage_1	109	U16	0.1	0.1V
dc_current_1	110	U16	0.1	0.1A
dc_voltage_2	111	U16	0.1	0.1V
dc_current_2	112	U16	0.1	0.1A
grid_side_voltage_l1_n	150	U16	0.1	0.1V
grid_side_voltage_l2_n	151	U16	0.1	0.1V
grid_side_voltage_l1_l2	152	U16	0.1	0.1V
voltage_middle_side_relay_l1_l2	153	U16	0.1	0.1V
inverter_output_voltage_l1_n	154	U16	0.1	0.1V
inverter_output_voltage_l2_n	155	U16	0.1	0.1V
inverter_output_voltage_l1_l2	156	U16	0.1	0.1V
load_voltage_l1	157	U16	0.1	0.1V
load_voltage_l2	158	U16	0.1	0.1V
grid_side_current_l1	160	I16	0.01	0.01A
grid_side_current_l2	161	I16	0.01	0.01A
grid_external_limiter_current_l1	162	I16	0.01	0.01A
grid_external_limiter_current_l2	163	I16	0.01	0.01A
inverter_output_current_l1	164	I16	0.01	0.01A
inverter_output_current_l2	165	I16	0.01	0.01A
gen_or_ac_coupled_power_input	166	I16	1	1W
grid_side_l1_power	167	I16	1	1W
grid_side_l2_power	168	I16	1	1W
total_power_grid_side_l1_l2	169	I16	1	1W
grid_external_limiter1_power	170	I16	1	1W
grid_external_limiter2_power	171	I16	1	1W
grid_external_total_power	172	I16	1	1W
inverter_output_l1_power	173	I16	1	1W
inverter_output_l2_power	174	I16	1	1W
inverter_output_total_power	175	I16	1	1W
load_side_l1_power	176	I16	1	1W
load_side_l2_power	177	I16	1	1W
load_side_total_power	178	I16	1	1W
load_current_l1	179	I16	0.01	0.01A
load_current_l2	180	I16	0.01	0.01A
gen_port_voltage_l1_l2	181	U16	0.1
battery_temperature	182	U16	0.1	0.1°C
battery_voltage	183	U16	0.01	0.01V
battery_capacity_soc	184	U16	1	1%
pv1_input_power	186	U16	1	1W
pv2_input_power	187	U16	1	1W
battery_output_power	190	I16	1	1W
battery_output_current	191	I16	0.01	0.01A
load_frequency	192	U16	0.01	0.01Hz
inverter_output_frequency	193	U16	0.01	0.01Hz
grid_side_relay_status	194	U16	1
generator_side_relay_status	195	U16	1
generator_relay_frequency	196	U16	0.01	0.01Hz

link settings as documented (unverified): RTU; default 9600 8N1; unit ID 1; FC 03; The inverter's Slave ID is 0x01. This cannot be changed. The inverter must be in 'BMS Lithium Batt' mode '00' for this protocol to function.

⚠ Any damage caused to the inverter due to the use of any Modbus device is NOT covered by Sol-Ark's warranty. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)

terminals	RJ-45 ports labeled 'RJ45_485', 'RJ45_CAN', 'RS-485', 'CAN', or 'Battery CAN Bus' depending on model, or terminal connectors for RS-485 and CAN.
A/B polarity	Pin 1/8: RS-485 B-, Pin 2/7: RS-485 A+
termination	The inverter already has termination internally. A 120 Ohm termination resistor should be used on the master side of the communication cable.
connector	RJ-45 or terminal connectors
shield/ground	Ground MUST be connected between the inverter and master device (Pin 3 and Pin 6 on RJ-45).
wiring notes	Ground MUST be connected between the inverter and master device. Without ground connected, communication can be easily disrupted by external noise sources.
max registers/read	125
broadcast	not supported
protocol notes	The inverter only supports read operations.
serial register	3
identification notes	Serial number is ten ASCII characters stored in registers 3 to 7.
doc revision	V1.1 (2021-04-15)

generated by gemini:gemini-3.5-flash · harvested from https://www.dth.net/solar/sol-ark/Modbus%20Sol-Ark%20V1.1(Public%20Release).pdf (Sol-Ark); manual-faithful — the document's claims, panel risk: LOW — panel concurs, no field disagreements; proved interop-verified on 2026-06-10 · recorded 2026-06-10

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.

Have a device that isn't here? Upload its register map — generation is free, and the connector earns its rung by being proven, not claimed.

Need it proven on your own device? Hardware verification — if it doesn't verify, you don't pay.

Building a platform? License the verified library — machine-readable maps, firmware matrix, API access.