Domoticz

Posted: **Tuesday 22 April 2025 10:07**

Hello Domoticz Community,

I'm interested in implementing an Energy Management System (EMS) within my Domoticz setup to optimize energy consumption based on factors like solar PV production and dynamic electricity pricing.
I came across EMHASS (Energy Management for Home Assistant), which can schedule deferrable loads such as EV charging, water heaters, and batteries, aiming to minimize energy costs while maximizing self-consumption.

Are there any similar solutions or plugins available for that I can use with Domoticz that offer comparable functionality?
I'm particularly interested in:

Optimizing energy consumption based on real-time solar production and electricity prices

Scheduling deferrable loads to operate during optimal times.

Any insights, experiences, or recommendations would be greatly appreciated

Thank you in advance for your assistance.

Posted: **Tuesday 22 April 2025 12:22**

In fact you can achieve all this using dzVents.
Car charging on solar energy, swichting on P1 results is the basic setup.
For orientation:

Code: Select all

        -- Basisgegevens ophalen
        local solarPower = domoticz.devices('Zonnepanelen').WhActual
        local ChargingSwitchState = domoticz.devices('Charging Level').levelName
        local EVSwitch_16A = domoticz.devices('EVSE Main')
        local chargeLevelSet = domoticz.devices('XC40 battery charge set').level
        local chargeLevelActual = domoticz.devices('XC40-ChargeLevel').nValue
        local EVSE_Connected = domoticz.globalData.EVSE_Connected
        local newLevel = 'Off'
        
        -- Huidig vermogen van de laadpaal bepalen
        local PowerLaadpaal = domoticz.data.powerLevels[ChargingSwitchState] or 0
        
        -- Power gegevens ophalen
        local PowerReturn = tonumber(domoticz.devices('Power').rawData[6]) -- Terug naar het net
        local PowerConsumption = tonumber(domoticz.devices('Power').rawData[5]) -- Verbruik
        local availableEnergy = PowerLaadpaal + PowerReturn - PowerConsumption
        
        -- Controleer of we in handmatige of automatische modus zijn
        local isManualOverride = (EVSwitch_16A.state == 'On')

        -- Logging
        domoticz.log('#0 Solar Power: '.. solarPower, domoticz.LOG_DEBUG)
        domoticz.log('#1 EVSE connected: ' .. domoticz.globalData.EVSE_Connected, domoticz.LOG_DEBUG)
        domoticz.log('#2 Energy usage from the network: ' .. PowerConsumption, domoticz.LOG_DEBUG)
        domoticz.log('#3 Energy return to the network: ' .. PowerReturn, domoticz.LOG_DEBUG)
        domoticz.log('#4 Actual power on laadpaal: ' .. PowerLaadpaal, domoticz.LOG_DEBUG)
        domoticz.log('#5 Available energy: ' .. availableEnergy, domoticz.LOG_DEBUG)
        domoticz.log('#6 Manual override (EVSE switch on): ' .. tostring(isManualOverride), domoticz.LOG_DEBUG)

Posted: **Tuesday 22 April 2025 14:21**

Check for example this topic: viewtopic.php?t=39709

See as a reference also the energy Dahboard https://wiki.domoticz.com/Energy_dashboard
It is not a management system but only a dashboard.
For Dutch users there is the Enever integration that loads the future energy prices https://wiki.domoticz.com/Enever

Posted: **Tuesday 22 April 2025 15:32**

See also the scripts of user @psubiaco on his website: https://www.creasol.it/en/support/domot ... c-forecast and on his github: https://github.com/CreasolTech/domoticz_lua_scripts

And his EMS project viewtopic.php?t=37281

In github repository it's possible to find script_device_power.lua, that should be placed in domoticz/scripts/lua directory, that manages EV charging, checks for power imported from the grid disabled or reducing loads when imported power is near the maximum permitted, enable some loads (electric heaters, dehumidifiers, ...) in case of extra production from photovoltaic, shows current power usage/export on red/green LEDs, activate white leds in case of blackout, ...

Posted: **Thursday 24 April 2025 8:25**

Thank you for the valuable insights and links you shared.

To clarify my current setup (which is already implemented in Domoticz):

EV Charging Station: Capable of adjusting current between 6A and 32A, including the option to switch off. I mode my own arduino board for this.

Boiler: Power output controllable from 0% to 100%, with an option to switch off. I made my own ESP board for this.

Energy Prices: Retrieved via the ENTSO-E platform.

I'm now constructing a DIY home battery system to store energy. The goal is to charge the battery when electricity prices are low or even negative and discharge (inject into the grid) when prices are high.

So my next Steps are:

Solar PV Forecasting: Develop a day-ahead prediction of solar power generation.

Price Comparison: Compare the solar forecast with day-ahead electricity prices.

Load scheduling: Schedule energy consumption for the following day. I also would like to be able to prioritize certain loads. For instance, ensure that the EV battery reaches at least 55% charge by a specific time, by using the best time slots (with lowest energy prices.

I'm now exploring existing systems (or code) that can help me facilitate these functionalities within Domoticz.
This code seems very interesting: https://github.com/WillemD61/battery-planning

Domoticz

Energy Management Systems (EMS) Integration with Domoticz

Energy Management Systems (EMS) Integration with Domoticz

Re: Energy Management Systems (EMS) Integration with Domoticz

Re: Energy Management Systems (EMS) Integration with Domoticz

Re: Energy Management Systems (EMS) Integration with Domoticz

Re: Energy Management Systems (EMS) Integration with Domoticz