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EMON-TUI - Missing Sensors

Sensors published by Node-RED MQTT but not yet supported in Rust codebase (src/config.rs, src/state.rs, src/ui.rs)

TOU (Time of Use) Sensors - 8 sensors

Sensor Name MQTT Topic Description Notes
on_peak_rate emon/on_peak_rate On-peak electricity rate Cost per kWh during peak hours
off_peak_rate emon/off_peak_rate Off-peak electricity rate Cost per kWh during off-peak hours
tou_daily_on_peak_kwh emon/tou_daily_on_peak_kwh Daily on-peak consumption kWh consumed during peak hours today
tou_daily_off_peak_kwh emon/tou_daily_off_peak_kwh Daily off-peak consumption kWh consumed during off-peak hours today
tou_daily_on_peak_cost emon/tou_daily_on_peak_cost Daily on-peak cost Total cost for peak hours today
tou_daily_off_peak_cost emon/tou_daily_off_peak_cost Daily off-peak cost Total cost for off-peak hours today
tou_status emon/tou_status Current TOU status "On Peak" or "Off Peak"
pea_ft emon/pea_ft PEA FT sensor Electricity tariff/fee information

UI Integration Ideas:

  • Add TOU section showing current status and rates
  • Daily breakdown of peak/off-peak consumption
  • Cost analysis cards

Inverter String Sensors - 12 sensors

Per-string monitoring for multi-inverter systems

Sensor Name MQTT Topic Description Notes
emon_inverter_1_string_1_power emon/emon_inverter_1_string_1_power Inverter 1 String 1 Power Watts
emon_inverter_1_string_1_voltage emon/emon_inverter_1_string_1_voltage Inverter 1 String 1 Voltage Volts
emon_inverter_1_string_2_power emon/emon_inverter_1_string_2_power Inverter 1 String 2 Power Watts
emon_inverter_1_string_2_voltage emon/emon_inverter_1_string_2_voltage Inverter 1 String 2 Voltage Volts
emon_inverter_2_string_1_power emon/emon_inverter_2_string_1_power Inverter 2 String 1 Power Watts
emon_inverter_2_string_1_voltage emon/emon_inverter_2_string_1_voltage Inverter 2 String 1 Voltage Volts
emon_inverter_2_string_2_power emon/emon_inverter_2_string_2_power Inverter 2 String 2 Power Watts
emon_inverter_2_string_2_voltage emon/emon_inverter_2_string_2_voltage Inverter 2 String 2 Voltage Volts
emon_inverter_3_string_1_power emon/emon_inverter_3_string_1_power Inverter 3 String 1 Power Watts
emon_inverter_3_string_1_voltage emon/emon_inverter_3_string_1_voltage Inverter 3 String 1 Voltage Volts
emon_inverter_3_string_2_power emon/emon_inverter_3_string_2_power Inverter 3 String 2 Power Watts
emon_inverter_3_string_2_voltage emon/emon_inverter_3_string_2_voltage Inverter 3 String 2 Voltage Volts

UI Integration Ideas:

  • Per-string power breakdown table
  • Voltage balance indicator
  • String efficiency comparison
  • Mini gauges per string

Cost Tracking Sensors - 9 sensors

Sensor Name MQTT Topic Description Notes
grid_daily_cost emon/grid_daily_cost Daily grid electricity cost Today's cost from grid
grid_monthly_cost emon/grid_monthly_cost Monthly grid electricity cost This month's cost
grid_yearly_cost emon/grid_yearly_cost Yearly grid electricity cost This year's cost
total_daily_cost emon/total_daily_cost Daily total electricity cost Grid cost after solar savings
total_daily_saved emon/total_daily_saved Daily solar savings Money saved from solar today
total_monthly_cost emon/total_monthly_cost Monthly total electricity cost Grid cost after solar savings
total_monthly_saved emon/total_monthly_saved Monthly solar savings Money saved from solar this month
total_yearly_cost emon/total_yearly_cost Yearly total electricity cost Grid cost after solar savings
total_yearly_saved emon/total_yearly_saved Yearly solar savings Money saved from solar this year

UI Integration Ideas:

  • Cost section in SUMMARY & STATISTICS
  • Daily cost bar chart
  • Monthly cost trend line chart
  • Savings percentage display
  • ROI calculator (solar investment)

Additional Sensors - 5 sensors

Sensor Name MQTT Topic Description Notes
emon_load_ratio emon/emon_load_ratio Load ratio Percentage of max solar power used
emon_night_ratio emon/emon_night_ratio Night consumption ratio Night/day consumption ratio
emon_load_power emon/emon_load_power Load power (alternative) Alternative to load_consumption
emon_voltage_load emon/emon_voltage_load Load voltage Voltage at load side
emon_daily_battery_discharge_energy emon/emon_daily_battery_discharge_energy Daily battery discharge kWh discharged today

UI Integration Ideas:

  • emon_load_ratio: Already calculated in code, could display directly
  • emon_night_ratio: Add to consumption stats
  • emon_load_power: Could be used as alternative or for comparison
  • emon_voltage_load: Add to LOAD card
  • emon_daily_battery_discharge_energy: Combine with charge energy for net battery flow

Summary

Category Count Total Sensors
TOU Sensors 8 8
Inverter String Sensors 12 20
Cost Tracking Sensors 9 29
Additional Sensors 5 34

Total Missing Sensors: 34

Implementation Notes

To Add These Sensors:

  1. Update src/config.rs:

    • Add fields to Entities struct
    • Update default config template

  2. Update src/state.rs:

    • Add fields to PowerData struct
    • Fetch sensors in update() method
    • Parse values with parse_entity_value()

  3. Update src/ui.rs:

    • Add UI components (tables, cards, charts)
    • Integrate into layout
    • Style and format display

  4. Update config.toml.example:

    • Add sensor examples with comments

Priority Suggestions:

High Priority:

  • Cost tracking sensors (9) - Financial insights
  • TOU sensors (8) - Peak/off-peak optimization

Medium Priority:

  • Inverter string sensors (12) - Technical monitoring
  • Additional sensors (5) - Enhanced data

Low Priority:

  • All are optional, can be added as needed

Current Supported Sensors: 62

As of now, the Rust codebase supports:

  • Core power: 4 (solar, grid import/export, load)
  • Load: 3 (current, power factor, essential)
  • Battery: 5 (power, voltage, soc, temp, current)
  • Inverter: 6 (temp, voltage, status, frequency, dc temp, radiator temp)
  • Grid: 3 (voltage, ct power, power factor)
  • Daily energy: 6 (battery charge/discharge, grid import/export, load, pv)
  • Total energy: 2 (pv generation, remaining)
  • Statistics: 13 (peaks, consumption, forecast, load totals)
  • Total: 62 sensors

With Missing Sensors Added: 96 sensors total

Document created: 2026-01-23 Last updated: 2026-01-23