Why does the soc register always read zero or a fixed value?

The Alfred 10 may report zero on register 8192 if the battery management system has not completed its initialisation cycle. Allow the system to complete one full charge-discharge cycle after commissioning. Also confirm the unit ID in the portal matches the inverter's configured Modbus slave ID.

The Gateway connects but power and energy registers return no data. What now?

Registers 8201 and 8209 are 32-bit values spanning two consecutive 16-bit holding registers. Confirm your portal template is reading them as int32 and uint32 respectively. A word-order mismatch (big-endian vs. little-endian) will produce garbage or zero values. Check that the Alfred 10 IP is reachable from the Gateway subnet and that no firewall blocks TCP port 502.

I wrote a battery mode value but the Alfred 10 ignores it. Why?

Multiple mode registers (8448, 8449, 8450, 8451, 8524) may need to be written in a specific combination or sequence to activate a mode change. Consult the Alfred 10 Modbus documentation for valid mode word values. Writing an unsupported value is silently ignored by the inverter firmware.

Is it safe to write to the battery mode registers remotely via ModbusCloud?

Use caution when writing to registers 8448 to 8451 and 8524. An incorrect mode command can force the battery into a state that conflicts with grid-export limits or protection thresholds set by the installer. Always test mode writes during commissioning under supervision and confirm the new mode on the Alfred 10 display before enabling automated writes in production.

Free Modbus template: Strong Energy Alfred 10 (battery)

The Strong Energy Alfred 10 is an all-in-one residential and commercial battery storage system combining a 10 kW hybrid inverter with a lithium iron phosphate battery in capacities from 12 kWh to 24 kWh. This ModbusCloud template communicates over Modbus TCP and reads battery state of charge (register 8192), instantaneous power (register 8201), and cumulative energy throughput (register 8209). Five write registers (8448 to 8451, 8524) expose the battery operating mode, enabling charge and discharge control from your portal. Together these registers give installers and asset managers a complete picture of storage behaviour and direct control over operating modes without accessing the Alfred 10 locally.

Name	Address	Function	Type	Unit	Access
power Instantaneous battery power, positive for discharge, negative for charge.	8201	FC03	int32	W	R
energy Cumulative energy throughput of the battery system.	8209	FC03	uint32	Wh	R
soc Battery state of charge, 0 to 100 percent.	8192	FC03	uint16	%	R
batterymode_a Battery operating mode control register, primary mode selector.	8448	FC16	uint16		W
batterymode_b Battery operating mode control register, secondary mode selector.	8524	FC16	uint16		W
batterymode_e Battery operating mode parameter register E, mode configuration detail.	8449	FC16	uint16		W
batterymode_f Battery operating mode parameter register F, mode configuration detail.	8450	FC16	uint16		W
batterymode_g Battery operating mode parameter register G, mode configuration detail.	8451	FC16	uint16		W

Strong Energy Alfred 10 (battery)

Overview

Use cases

Installation

Things to watch for

Registers (8)

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