All power registers return zero even when the inverter is running. Why?

The 33263 and per-phase power registers are sourced from the external grid meter connected to the inverter's meter port. If no Eastron or Acrel meter is installed and configured in the inverter's advanced settings, the inverter reports zero for all meter registers. Verify that a compatible meter is wired and that the correct meter type is selected in the inverter communication settings.

The energy register at 33283 reads an implausibly large number. What is wrong?

Register 33283 is a uint32 value with a scaling factor of 0.01 kWh (divide the raw value by 100 to get kWh). If your Modbus master is treating the raw integer as watt-hours without applying this scale, the displayed figure will be 100 times too large. Confirm that the ModbusCloud template scaling is applied correctly before comparing values against utility meter data.

Phase currents and powers read garbled or oscillating values. What causes this?

The per-phase power registers (33257, 33259, 33261) and the total power register (33263) are 32-bit signed values spanning two consecutive 16-bit Modbus registers. Reading only one word, or reversing word order (little-endian instead of big-endian), produces corrupted readings. Ensure your polling request reads both words in a single contiguous block starting at the base address, and that word order is big-endian (high word first).

The Gateway connects but returns timeout errors after a few minutes. What should I check?

The Solis-platform RS485 bus on the AXIhycon 12-15H is also used by the manufacturer's datalogger dongle. Having two Modbus masters competing on the same bus causes collisions and timeouts. Either remove the datalogger dongle while the ModbusCloud Gateway is connected, or use an RS485 splitter with arbitration. Also confirm the baud rate matches: the inverter default is 9600 bps, 8 data bits, 1 stop bit, no parity.

Free Modbus template: Axitec AXIhycon 12-15H (grid)

The Axitec AXIhycon 12-15H is a three-phase hybrid solar inverter designed for residential and light-commercial self-consumption systems with battery storage. This template reads the inverter's internal grid-meter data over Modbus RTU via the RS485 COM port, giving you per-phase currents and active power on phases A, B, and C, total grid active power, and cumulative energy imported from the grid. Because all eight registers are read-only input registers polled with function code 4, the template is safe to deploy without any risk of altering inverter settings. Use it in ModbusCloud to track grid exchange in real time across all three phases.

Name	Address	Function	Type	Unit	Access
power Total active power at the grid connection point, signed, in watts.	33263	FC04	int32	W	R
energy Cumulative total active energy imported from the grid, in watt-hours.	33283	FC04	uint32	Wh	R
currents_a AC current on phase A measured by the grid meter.	33252	FC04	uint16	A	R
currents_b AC current on phase B measured by the grid meter.	33254	FC04	uint16	A	R
currents_c AC current on phase C measured by the grid meter.	33256	FC04	uint16	A	R
powers_a Active power on phase A, signed, positive means import.	33257	FC04	int32	W	R
powers_b Active power on phase B, signed, positive means import.	33259	FC04	int32	W	R
powers_c Active power on phase C, signed, positive means import.	33261	FC04	int32	W	R

Axitec AXIhycon 12-15H (grid)

Overview

Use cases

Installation

Things to watch for

Registers (8)

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