Electro Industries Shark 50 Modbus register map

Electro Industries/GaugeTech Shark 50 panel meter with the optional RS-485 port (Modbus RTU/ASCII)

Official
89 registers
Modbus RTU
Revision 3 · 2026-10-18
Identity: model, firmware, serial number

Official: Written from the manufacturer's documentation, but not tested on a device yet. Check the map against the manufacturer's documentation before you write to a live device. Tested it? Report a test.

Download .mbmap.json Raw JSON View on GitHub Suggest a correction Report a problem

Communication

Protocol: Modbus RTU
Unit ID: 1
Serial: 57600 8N1 · 57600 baud, 8 data bits, none parity, 1 stop bit
Byte / word order: ABCD · bytes big-endian, words high first
Addresses: 0-based

Connection values are defaults: the device may be configured differently.

Map

Registers: 89 holding registers
Groups: 9
Revision: 3 · 2026-10-18
Added: 2026-10-14 (2026-10-14)
File: maps/electro-industries/shark-50.mbmap.json · 16 KB · history
SHA-256: 2215330c34aa3ccd2eedb603d61bc88d3cc45415d335597e4a7a7d953c6ccc8f
Manufacturer: electroind.com

Device identity

What a tool can read to check that this map fits the connected device (SPEC.md section 4.7). Registers with a role are read like any other register.

Registers
Role	Register	Address	Type
Model	Meter name	holding 0	string[8]
Serial number	Meter serial number	holding 8	string[8]
Firmware	Firmware version	holding 17	string[2]

Sources and notes

Shark 50/50B/100/100B Meter User Manual · version V.1.40
Doc# E145701, Appendix B, Shark 50 Modbus map; downloaded through the vendor's download form

Source: Electro Industries/GaugeTech, "Shark 50/50B/100/100B Meter User Manual", V.1.40 (Doc# E145701)

All registers are holding registers (FC03 read, FC06/FC10 write). Addresses here are the zero-based hex addresses of the manual; the manual's decimal register numbers are one higher (e.g. 0x03E7 = register 1000).
32-bit values and floats span two registers with the high-order half first.
Factory settings in normal mode are 57600 baud, address 1, Modbus RTU. For the first 5 seconds after power-up the RS-485 port also answers at 9600 baud, address 1, and stays in that mode while it is used.
Energy registers are integers whose scale, digit count and decimal places follow the power and energy format setting. Reset the energy after changing that format.
The 3-phase power readings at 0x0383-0x0388 are updated every 6 cycles; the other readings every 60 cycles.
Not in this map: the programmable settings, the meter programming and encryption blocks and the secondary readings.

Area	Address	Type	Access	Unit	Scale	Description
HR	0	string[8]	R
HR	8	string[8]	R
HR	16	uint16	R
HR	17	string[2]	R
HR	19	uint16	R
HR	20	uint16	R
HR	21	uint16	R
HR	899	float32 ABCD	R	W
HR	901	float32 ABCD	R	var
HR	903	float32 ABCD	R	VA
HR	999	float32 ABCD	R	V
HR	1001	float32 ABCD	R	V
HR	1003	float32 ABCD	R	V
HR	1005	float32 ABCD	R	V
HR	1007	float32 ABCD	R	V
HR	1009	float32 ABCD	R	V
HR	1011	float32 ABCD	R	A
HR	1013	float32 ABCD	R	A
HR	1015	float32 ABCD	R	A
HR	1017	float32 ABCD	R	W
HR	1019	float32 ABCD	R	var
HR	1021	float32 ABCD	R	VA
HR	1023	float32 ABCD	R
HR	1025	float32 ABCD	R	Hz
HR	1027	float32 ABCD	R	A
HR	1099	int32 ABCD	R	Wh		Integer energy; scale and decimal places follow the power and energy format setting
HR	1101	int32 ABCD	R	Wh		Integer energy; scale and decimal places follow the power and energy format setting
HR	1103	int32 ABCD	R	Wh		Integer energy; scale and decimal places follow the power and energy format setting
HR	1105	int32 ABCD	R	Wh		Integer energy; scale and decimal places follow the power and energy format setting
HR	1107	int32 ABCD	R	varh		Integer energy; scale and decimal places follow the power and energy format setting
HR	1109	int32 ABCD	R	varh		Integer energy; scale and decimal places follow the power and energy format setting
HR	1111	int32 ABCD	R	varh		Integer energy; scale and decimal places follow the power and energy format setting
HR	1113	int32 ABCD	R	varh		Integer energy; scale and decimal places follow the power and energy format setting
HR	1115	int32 ABCD	R	VAh		Integer energy; scale and decimal places follow the power and energy format setting
HR	1999	float32 ABCD	R	A
HR	2001	float32 ABCD	R	A
HR	2003	float32 ABCD	R	A
HR	2005	float32 ABCD	R	W
HR	2007	float32 ABCD	R	var
HR	2009	float32 ABCD	R	W
HR	2011	float32 ABCD	R	var
HR	2013	float32 ABCD	R	VA
HR	2015	float32 ABCD	R
HR	2017	float32 ABCD	R
HR	2999	float32 ABCD	R	V
HR	3001	float32 ABCD	R	V
HR	3003	float32 ABCD	R	V
HR	3005	float32 ABCD	R	V
HR	3007	float32 ABCD	R	V
HR	3009	float32 ABCD	R	V
HR	3011	float32 ABCD	R	A
HR	3013	float32 ABCD	R	A
HR	3015	float32 ABCD	R	A
HR	3017	float32 ABCD	R	W
HR	3019	float32 ABCD	R	var
HR	3021	float32 ABCD	R	W
HR	3023	float32 ABCD	R	var
HR	3025	float32 ABCD	R	VA
HR	3027	float32 ABCD	R
HR	3029	float32 ABCD	R
HR	3031	float32 ABCD	R	Hz
HR	3099	float32 ABCD	R	V
HR	3101	float32 ABCD	R	V
HR	3103	float32 ABCD	R	V
HR	3105	float32 ABCD	R	V
HR	3107	float32 ABCD	R	V
HR	3109	float32 ABCD	R	V
HR	3111	float32 ABCD	R	A
HR	3113	float32 ABCD	R	A
HR	3115	float32 ABCD	R	A
HR	3117	float32 ABCD	R	W
HR	3119	float32 ABCD	R	var
HR	3121	float32 ABCD	R	W
HR	3123	float32 ABCD	R	var
HR	3125	float32 ABCD	R	VA
HR	3127	float32 ABCD	R
HR	3129	float32 ABCD	R
HR	3131	float32 ABCD	R	Hz
HR	4099	int16	R	°	×0.1
HR	4100	int16	R	°	×0.1
HR	4101	int16	R	°	×0.1
HR	4102	int16	R	°	×0.1
HR	4103	int16	R	°	×0.1
HR	4104	int16	R	°	×0.1
HR	4999	uint16	R
HR	5001	uint32 ABCD	R	s	×0.004
HR	19999	uint16	W			Write the password (5555 when passwords are disabled)
HR	20000	uint16	W			Write the password (5555 when passwords are disabled)
HR	24999	uint16	W			Write the password (5555 when passwords are disabled)

Help improve this map

I tested it on a deviceReport whether it worked, even if you did not write the map.
Suggest a correctionEdit the file on GitHub; it opens a pull request.
Report a problemA wrong address, type, scale or byte order.
Read the formatWhat each key of the file means (SPEC.md).