Victron GX (Modbus-TCP register list)

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
battery_voltage_system	840	U16	0.1
battery_current_system	841	I16	0.1
battery_power_system	842	I16	1
battery_soc_system	843	U16	1
battery_state_system	844	U16	1
pv_dc_coupled_power	850	U16	1
pv_dc_coupled_current	851	I16	0.1
dc_system_power	860	I16	1
vebus_input_voltage_p1	3	U16	0.1
vebus_input_voltage_p2	4	U16	0.1
vebus_input_voltage_p3	5	U16	0.1
vebus_input_current_p1	6	I16	0.1
vebus_input_current_p2	7	I16	0.1
vebus_input_current_p3	8	I16	0.1
vebus_input_frequency_p1	9	I16	0.01
vebus_output_voltage_p1	15	U16	0.1
vebus_output_voltage_p2	16	U16	0.1
vebus_output_voltage_p3	17	U16	0.1
vebus_output_current_p1	18	I16	0.1
vebus_output_current_p2	19	I16	0.1
vebus_output_current_p3	20	I16	0.1
vebus_output_frequency	21	I16	0.01
vebus_battery_voltage	26	U16	0.01
vebus_battery_current	27	I16	0.1
vebus_state	31	U16	1
vebus_battery_temperature	61	I16	0.1
battery_voltage	259	U16	0.01
battery_current	261	I16	0.1
battery_temperature	262	I16	0.1
battery_soc	266	U16	0.1
battery_capacity	309	U16	0.1
solarcharger_battery_voltage	771	U16	0.01
solarcharger_battery_current	772	I16	0.1
solarcharger_pv_voltage	776	U16	0.01
solarcharger_pv_power	789	U16	0.1
solarcharger_pv_power_32	792	U32BE	1
grid_l1_power	2600	I16	1
grid_l2_power	2601	I16	1
grid_l3_power	2602	I16	1
grid_l1_voltage	2616	U16	0.1
grid_l1_current	2617	I16	0.1
grid_l2_voltage	2618	U16	0.1
grid_l2_current	2619	I16	0.1
grid_l3_voltage	2620	U16	0.1
grid_l3_current	2621	I16	0.1

generated by gemini:gemini-3.5-flash · harvested from https://raw.githubusercontent.com/victronenergy/dbus_modbustcp/master/CCGX-Modbus-TCP-register-list.xlsx (Victron Energy); manual-faithful — the document's claims, panel risk: ELEVATED — panel is not confident; 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.