Solis Monitor

Monitoring solution for Solis inverters using Modbus TCP/RTU. Polls register data, stores it in SQLite, and exposes it via a web API, frontend dashboard and Prometheus metrics.

API

After starting, the API Docs are available at /docs.

Health Check

A health check endpoint is available at /health.

Metrics

If enabled, Prometheus metrics are exposed at /metrics.

Configuration

Copy config.yaml and adjust settings. All options can be overridden via environment variables using the SOLIS_ prefix (e.g., SOLIS_MODBUS_HOST=192.168.1.200).

Example Configuration

# Solis-Monitor Configuration
app:
  debug: INFO      # DEBUG, INFO, WARN, ERROR, FATAL
  port: 8080
  timeout: 30s

poller:
  interval: 30s
  block_attempts: 3
  block_retry_delay: 1s
  block_interval: 0s
  poll_timeout: 30s

modbus:
  type: tcp
  host: 192.168.2.151
  port: 502
  timeout: 5s
  unit_id: 1
  # For RTU:
  # type: rtu
  # serial_port: /dev/ttyUSB0
  # baud_rate: 9600
  # data_bits: 8
  # stop_bits: 1
  # parity: none

storage:
  path: ./data/solis.db
  daily_retention: 87600h  # 10 years
  monthly_retention: 87600h
  yearly_retention: 87600h
  error_retention: 720h   # 30 days
  wal_mode: true
  synchronous: NORMAL
  temp_store: MEMORY

metrics:
  enabled: true

registers:
  disabled_keys: []
  # Example: disable specific registers
  # disabled_keys:
  #   - meter_total_active_power

App Settings

Option	Type	Default	Description
`debug`	string	INFO	Log level: DEBUG, INFO, WARN, ERROR, FATAL
`port`	int	8080	HTTP server port (1-65535)
`timeout`	duration	30s	Request timeout

Poller Settings

Option	Type	Default	Description
`interval`	duration	30s	Base interval between poll cycles
`block_attempts`	int	3	Retry attempts per block if read fails
`block_retry_delay`	duration	1s	Delay between retry attempts for same block
`block_interval`	duration	0s	Delay between successive block reads (0 = immediate)
`poll_timeout`	duration	30s	Maximum duration for full poll cycle before aborting

Modbus Settings

Option	Type	Default	Description
`type`	string	tcp	Connection type: tcp, rtu, or rtu_over_tcp
`host`	string	192.168.1.100	Modbus server IP/hostname (TCP only)
`port`	int	502	Modbus server port (1-65535)
`timeout`	duration	5s	Connection/read timeout
`unit_id`	byte	1	Modbus unit/slave ID (1-247)
`serial_port`	string		Serial port for RTU (e.g., /dev/ttyUSB0)
`baud_rate`	int		Baud rate for RTU
`data_bits`	int		Data bits for RTU (5, 6, 7, 8)
`stop_bits`	int		Stop bits for RTU (1, 2)
`parity`	string		Parity for RTU: none, even, odd

Storage Settings (SQLite)

Option	Type	Default	Description
`path`	string	./data/solis.db	Path to SQLite database file
`daily_retention`	duration	8760h	Retention for daily energy values
`monthly_retention`	duration	8760h	Retention for monthly energy values
`yearly_retention`	duration	8760h	Retention for yearly energy values
`error_retention`	duration	720h	Retention for error/fault data (30 days)
`wal_mode`	bool	true	Enable Write-Ahead Logging
`synchronous`	string	NORMAL	Sync mode: OFF, NORMAL, FULL, EXTRA
`temp_store`	string	MEMORY	Temp storage: DEFAULT, FILE, MEMORY

Metrics Settings

Option	Type	Default	Description
`enabled`	bool	false	Enable Prometheus metrics endpoint

Registers Settings

Option	Type	Default	Description
`disabled_keys`	[]string	[]	Register keys to disable (exclude from polling, storage, API)

Available Registers

All registers are polled by default. Disable specific ones via registers.disabled_keys in config.

Information Registers

Key	Name	Address	Type	Scale	Stability
solis_model_no	Solis Model No	33000	Uint16	1.0	stable
solis_dsp_version	Solis DSP Version	33001	Uint16	1.0	stable
solis_hmi_version	Solis HMI Version	33002	Uint16	1.0	stable
solis_protocol_version	Solis Protocol Version	33003	Uint16	1.0	stable
solis_serial_number	Solis Serial Number	33004	String	1.0	stable

Energy Registers

Key	Name	Address	Type	Scale	Unit	Stability
pv_today_energy	Solis PV Today Energy Generation	33035	Uint16	0.1	kWh	dynamic
pv_month_energy	Solis PV Current Month Energy Generation	33031	Uint32	1	kWh	dynamic
pv_year_energy	Solis PV This Year Energy Generation	33037	Uint32	1	kWh	dynamic
pv_total_energy	Solis PV Total Energy Generation	33029	Uint32	1	kWh	dynamic

PV Voltage/Current Registers

Key	Name	Address	Type	Scale	Unit	Stability
pv_voltage_1	Solis PV Voltage 1	33049	Uint16	0.1	V	dynamic
pv_current_1	Solis PV Current 1	33050	Uint16	0.1	A	dynamic
pv_voltage_2	Solis PV Voltage 2	33051	Uint16	0.1	V	dynamic
pv_current_2	Solis PV Current 2	33052	Uint16	0.1	A	dynamic
pv_voltage_3	Solis PV Voltage 3	33053	Uint16	0.1	V	dynamic
pv_current_3	Solis PV Current 3	33054	Uint16	0.1	A	dynamic
pv_voltage_4	Solis PV Voltage 4	33055	Uint16	0.1	V	dynamic
pv_current_4	Solis PV Current 4	33056	Uint16	0.1	A	dynamic

PV Power and Bus Registers

Key	Name	Address	Type	Scale	Unit	Stability
total_pv_power	Solis Total PV Power	33057	Uint32	1	W	dynamic

Grid Voltage/Current Registers

Key	Name	Address	Type	Scale	Unit	Stability
a_phase_voltage	Solis A Phase Voltage	33073	Uint16	0.1	V	dynamic
b_phase_voltage	Solis B Phase Voltage	33074	Uint16	0.1	V	dynamic
c_phase_voltage	Solis C Phase Voltage	33075	Uint16	0.1	V	dynamic
a_phase_current	Solis A Phase Current	33076	Uint16	0.1	A	dynamic
b_phase_current	Solis B Phase Current	33077	Uint16	0.1	A	dynamic
c_phase_current	Solis C Phase Current	33078	Uint16	0.1	A	dynamic
active_power	Solis Active Power	33079	Uint32	1	W	dynamic
reactive_power	Solis Reactive Power	33081	Int32	0.1	VAR	dynamic
apparent_power	Solis Apparent Power	33083	Uint32	0.1	VA	dynamic
grid_frequency	Solis Grid Frequency	33094	Uint16	0.01	HZ	dynamic

Temperature and Status Registers

Key	Name	Address	Type	Scale	Unit	Stability
temperature	Solis Temperature	33093	Int16	0.1	C	dynamic
solis_status	Solis Status	33095	Uint16	1.0		dynamic

Fault Registers

Key	Name	Address	Type	Scale	Stability
grid_fault_status_01	Solis Grid Fault Status 01 (Bitmask)	33116	Uint16	1.0	dynamic
backup_load_fault_status_02	Solis Backup Load Fault Status 02 (Bitmask)	33117	Uint16	1.0	dynamic
battery_fault_status_03	Solis Battery Fault Status 03 (Bitmask)	33118	Uint16	1.0	dynamic
device_fault_status_04	Solis Device Fault Status 04 (Bitmask)	33119	Uint16	1.0	dynamic
device_fault_status_05	Solis Device Fault Status 05 (Bitmask)	33120	Uint16	1.0	dynamic
operating_status	Solis Operating Status (Bitmask)	33121	Uint16	1.0	dynamic

Battery Registers

Key	Name	Address	Type	Scale	Unit	Stability
battery_voltage	Solis Battery Voltage	33133	Uint16	0.1	V	dynamic
battery_current	Solis Battery Current	33134	Int16	0.1	A	dynamic
battery_current_direction	Solis Battery Current Direction	33135	Uint16	1.0		dynamic
battery_soc	Solis Battery SOC	33139	Uint16	1.0	%	dynamic
battery_soh	Solis Battery SOH	33140	Uint16	1.0	%	dynamic
battery_voltage_bms	Solis Battery Voltage (BMS)	33141	Uint16	0.01	V	dynamic
battery_fault_status_1_bms	Solis Battery Fault Status 1 (BMS)	33145	Uint16	1.0		dynamic
battery_fault_status_2_bms	Solis Battery Fault Status 2 (BMS)	33146	Uint16	1.0		dynamic
battery_power	Solis Battery Power	33149	Int32	1	W	dynamic

Backup Registers

Key	Name	Address	Type	Scale	Unit	Stability
backup_ac_voltage_phase_a	Solis Backup AC Voltage Phase A	33137	Uint16	0.1	V	dynamic
backup_ac_current_phase_a	Solis Backup AC Current Phase A	33138	Uint16	0.1	A	dynamic
household_load_power	Solis Household Load Power	33147	Uint16	1	W	dynamic
backup_load_power	Solis Backup Load Power	33148	Uint16	1	W	dynamic
ac_grid_port_power	Solis AC Grid Port Power	33151	Int32	0.1	W	dynamic

Battery Energy Registers

Key	Name	Address	Type	Scale	Unit	Stability
today_battery_charge_energy	Solis Today Battery Charge Energy	33163	Uint16	0.1	kWh	dynamic
today_battery_discharge_energy	Solis Today Battery Discharge Energy	33167	Uint16	0.1	kWh	dynamic
total_battery_discharge_energy	Solis Total Battery Discharge Energy	33165	Uint32	1	kWh	dynamic
total_battery_charge_energy	Solis Total Battery Charge Energy	33161	Uint32	1	kWh	dynamic

Grid Energy Registers

Key	Name	Address	Type	Scale	Unit	Stability
today_energy_imported_from_grid	Solis Today Energy Imported From Grid	33171	Uint16	0.1	kWh	dynamic
total_energy_imported_from_grid	Solis Total Energy Imported From Grid	33169	Uint32	0.1	kWh	dynamic
total_energy_fed_into_grid	Solis Total Energy Fed Into Grid	33173	Uint32	0.1	kWh	dynamic
today_energy_fed_into_grid	Solis Today Energy Fed Into Grid	33175	Uint16	0.1	kWh	dynamic
today_energy_consumption	Solis Today Energy Consumption	33179	Uint16	0.1	kWh	dynamic
total_energy_consumption	Solis Total Energy Consumption	33177	Uint32	1	kWh	dynamic

Household Load Registers

Key	Name	Address	Type	Scale	Unit	Stability
household_load_today_energy	Solis Household Load Today Energy	33586	Uint16	0.1	kWh	dynamic
household_load_year_energy	Solis Household Load Year Energy	33582	Uint32	1	kWh	dynamic
household_load_month_energy	Solis Household Load Month Energy	33584	Uint32	1	kWh	dynamic
household_load_total_energy	Solis Household Load Total Energy	33580	Uint32	1	kWh	dynamic

Backup Load Registers

Key	Name	Address	Type	Scale	Unit	Stability
backup_load_today_energy	Solis Backup Load Today Energy	33596	Uint16	0.1	kWh	dynamic
backup_load_total_energy	Solis Backup Load Total Energy	33590	Uint32	1	kWh	dynamic
backup_load_year_energy	Solis Backup Load Year Energy	33592	Uint32	1	kWh	dynamic
backup_load_month_energy	Solis Backup Load Month Energy	33594	Uint32	1	kWh	dynamic

Meter Registers

Key	Name	Address	Type	Scale	Unit	Stability
meter_ac_voltage_a	Solis Meter AC Voltage A	33251	Uint16	0.1	V	dynamic
meter_ac_current_a	Solis Meter AC Current A	33252	Uint16	0.1	A	dynamic
meter_ac_voltage_b	Solis Meter AC Voltage B	33253	Uint16	0.1	V	dynamic
meter_ac_current_b	Solis Meter AC Current B	33254	Uint16	0.1	A	dynamic
meter_ac_voltage_c	Solis Meter AC Voltage C	33255	Uint16	0.1	V	dynamic
meter_ac_current_c	Solis Meter AC Current C	33256	Uint16	0.1	A	dynamic
meter_active_power_a	Solis Meter Active Power A	33257	Int32	0.1	W	dynamic
meter_active_power_b	Solis Meter Active Power B	33259	Int32	0.1	W	dynamic
meter_active_power_c	Solis Meter Active Power C	33261	Int32	0.1	W	dynamic
meter_total_active_power	Solis Meter Total Active Power	33263	Int32	1.0	W	dynamic

Running

Docker (recommended)

# Production
docker-compose up -d

# Development (builds from source)
docker-compose -f docker-compose.dev.yaml up --build

Both mount ./data for persistence and ./config.yaml for configuration.

---
services:
  app:
    image: ghcr.io/dombyte/solis:latest
    volumes:
      - ./data:/app/data
      - ./config.yaml:/app/config.yaml:ro
    ports:
      - "8080:8080"
    restart: unless-stopped
    environment:
      - TZ=Europe/Berlin
    healthcheck:
      test: ["CMD", "httpcheck", "http://localhost:8080/health"]
      interval: 30s
      timeout: 10s
      retries: 3

Local

go run ./cmd
# or build first
go build -o solis ./cmd && ./solis

Development

# Build
go build -o solis ./cmd

# Run tests
go test ./...

# Format code
go fmt ./...

# Update dependencies
go mod tidy

Frontend

cd frontend
npm install
npm run dev

Name		Name	Last commit message	Last commit date
Latest commit History 41 Commits
.github/workflows		.github/workflows
cmd		cmd
docs		docs
frontend		frontend
internal		internal
.gitignore		.gitignore
.goreleaser.yaml		.goreleaser.yaml
AGENTS.md		AGENTS.md
Dockerfile		Dockerfile
Dockerfile.goreleaser		Dockerfile.goreleaser
LICENSE		LICENSE
README.md		README.md
config.yaml		config.yaml
docker-compose.dev.yaml		docker-compose.dev.yaml
docker-compose.yaml		docker-compose.yaml
go.mod		go.mod
go.sum		go.sum
register_map.csv		register_map.csv
renovate.json		renovate.json

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Solis Monitor

API

Health Check

Metrics

Configuration

Example Configuration

App Settings

Poller Settings

Modbus Settings

Storage Settings (SQLite)

Metrics Settings

Registers Settings

Available Registers

Information Registers

Energy Registers

PV Voltage/Current Registers

PV Power and Bus Registers

Grid Voltage/Current Registers

Temperature and Status Registers

Fault Registers

Battery Registers

Backup Registers

Battery Energy Registers

Grid Energy Registers

Household Load Registers

Backup Load Registers

Meter Registers

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Docker (recommended)

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