Hi everyone,
I recently submitted a pull request that introduces Dynamic MinSOC based on Solar Forecast, and I'd love your feedback and support.
👉 Pull Request: evcc-io#32688
The feature is already available for testing on Ubuntu using the build attached to the pull request.
Many EV owners face the same challenge, especially during the darker months of the year.
You arrive home from a trip with a low battery and plug in your vehicle. The question becomes: How much should EVCC charge now, and how much capacity should be reserved for today's or tomorrow's solar production? If i fast charge how will i stop it when the sun starts shining.
After all, solar energy is typically the cheapest energy available.
Today, EVCC uses a static MinSOC value. While this works well in summer, it can be less efficient during winter:
- A high MinSOC may cause unnecessary grid charging when you arrive home.
- A low MinSOC may leave the vehicle insufficiently charged for an unexpected trip.
- Solar production later in the day may go unused because the battery is already full.
- Family members and other drivers often don't want to manually adjust charging settings after every trip.
EVCC automatically adjusts the effective MinSOC based on the solar forecast.
This allows you to keep your vehicle in Solar mode while Dynamic MinSOC automatically determines how much fast charging is required.
- Significant solar production is expected.
- EVCC fast charges only to a low MinSOC level (for example 5% SOC).
- Maximum battery capacity remains available for solar charging.
- Moderate solar production is expected.
- EVCC fast charges to a medium MinSOC level (for example 40% SOC).
- The vehicle is asap ready for medium-distance trips while still reserving enough capacity for solar energy.
Little solar production is expected. EVCC charges more aggressively from the grid to ensure the vehicle is ready when needed. (for example 80% SOC). Only a small amount of battery capacity is reserved for available solar generation.
A smarter balance between:
- Cost of Fuel
- Vehicle readiness
- Self-consumption of solar energy
- Reduced manual configuration
- Better charging efficiency throughout the year
✅ No need to manually adjust charging settings after every trip
✅ Optimizes charging behavior during winter and low-production periods
✅ Maximizes the use of available solar energy
✅ Works with existing weather forecast integrations
✅ Configurable solar thresholds (Low, Medium, High)
✅ Configurable MinSOC targets for each forecast level
✅ Existing MinSOC behavior remains supported and can override dynamic settings if required
✅ Configurable per vehicle, allowing adjustment for different battery sizes and driving patterns
If this functionality would be valuable for your setup, please:
- Test the build attached to the pull request
- Share your feedback and real-world experiences
- Upvote This discussion to help demonstrate community interest
Community feedback and adoption are important factors in determining which enhancements are prioritized, so every test and every vote helps.
Thank you for taking the time to review and test the feature. My goal is to make EV charging a little smarter, more automated, and more solar-friendly for everyone.
Extra configuration options in weather prediction settings:
Car settings for overwrite or active setting:
evcc is an extensible EV Charge Controller and home energy management system.
Our goal is to provide local energy management, without relying on cloud services. Featured in PV Magazine and c’t Magazin.
- simple and clean user interface
- support for many EV chargers:
- ABB, ABL, Alfen, Alphatec, Amperfied, Ampure, Audi, AUTEL, Autoaid, Bender, BMW, cFos, Charge Amps, Compleo, CUBOS, Cupra, Dadapower, DaheimLaden, Delta, E.ON Drive, E3/DC, Easee, Ebee, echarge, EcoHarmony, Edgetech, Elecq, eledio, Elli, EM2GO, EN+, enercab, Ensto, EntraTek, ESL, eSystems, Etrel, EVBox, Free2Move, Free2move eSolutions, Fronius, Garo, go-e, Hardy Barth, Heidelberg, Hesotec, Homecharge, Huawei, Innogy, INRO, Juice, Kathrein, KEBA, Kontron Solar, Kostal, KSE, LadeFoxx, LRT, Mennekes, NRGkick, OBO Bettermann, OpenEVSE, openWB, Optec, Orbis, PC Electric, Peblar, Phoenix Contact, Plugchoice, Porsche, Pracht, Pulsares, Pulsatrix, Qcells, Schneider, Schrack, SENEC, Siemens, Skoda, SMA, Smartfox, SolarEdge, Solax, Sonnen, Spelsberg, Stark in Strom, Sungrow, TechniSat, Tesla, Tigo, TinkerForge, Ubitricity, V2C Trydan, Vestel, Victron, Viridian EV, Volkswagen, Volt Time, Wallbe, wallbox, Walther Werke, Webasto, Weidmüller, Zaptec, ZJ Beny. Read more.
- EEBus support (Elli, PMCC)
- OCPP support
- build-your-own: Phoenix Contact (includes ESL Walli), EVSE DIN
- smart switches: AVM, FRITZ!, Home Assistant, Homematic IP, HomeWizard, myStrom, Shelly, Tasmota, TP-Link. Read more.
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- support for many energy meters:
- solar inverters and battery systems: A-Tronix, Acrel, Ads-tec, Alpha ESS, Ampere, Anker, APsystems, AVM, Axitec, BGEtech, Bosch, Bosswerk, Carlo Gavazzi, Deye, E3/DC, Eastron, Enphase, FENECON, FRITZ!, FoxESS, Fronius, Ginlong, go-e, GoodWe, Growatt, Homematic IP, HomeWizard, Hoymiles, Huawei, IAMMETER, IGEN Tech, Kostal, LG, Loxone, M-TEC, Marstek, myStrom, OpenEMS, Powerfox, Qcells, RCT, SAJ, SAX, SENEC, Senergy, Shelly, Siemens, Sigenergy, SMA, Smartfox, SofarSolar, Solaranzeige, SolarEdge, SolarMax, Solarwatt, Solax, Solinteng, Sonnen, St-ems, Steca, Sungrow, Sunsynk, Sunway, Tasmota, Tesla, TP-Link, VARTA, Victron, Wattsonic, Youless, ZCS Azzurro, Zendure. Read more.
- general energy meters: A-Tronix, ABB, Acrel, Alpha ESS, Ampere, AVM, Axitec, Bernecker Engineering, BGEtech, Bosch, Carlo Gavazzi, cFos, Deye, DSMR, DZG, E3/DC, Eastron, Enphase, ESPHome, FENECON, FoxESS, FRITZ!, Fronius, Ginlong, go-e, GoodWe, Growatt, Homematic IP, HomeWizard, Huawei, IAMMETER, inepro, IOmeter, Janitza, KEBA, Kostal, LG, Loxone, M-TEC, mhendriks, my-PV, myStrom, OpenEMS, ORNO, P1Monitor, Powerfox, Qcells, RCT, Saia-Burgess Controls (SBC), SAJ, SAX, Schneider Electric, SENEC, Shelly, Siemens, Sigenergy, SMA, Smartfox, SofarSolar, Solaranzeige, SolarEdge, SolarMax, Solarwatt, Solax, Solinteng, Sonnen, St-ems, Sungrow, Sunsynk, Sunway, Tasmota, Tesla, Tibber, TQ, VARTA, Victron, Volkszähler, Wago, Wattsonic, Weidmüller, Youless, ZCS Azzurro, Zuidwijk. Read more.
- integrated systems: SMA Sunny Home Manager and Energy Meter, KOSTAL Smart Energy Meter (KSEM, EMxx)
- sunspec-compatible inverter or home battery devices
- mbmd-compatible devices, see volkszaehler/mbmd for a complete list
- vehicle integrations (state of charge, remote charge, battery and preconditioning status):
- Aiways, Audi, BMW, Citroën, Dacia, DS, Fiat, Ford, Genesis, Hyundai, Jeep, Kia, Mercedes-Benz, MG, Mini, Nissan, NIU, Opel, Peugeot, Polestar, Renault, Seat, Skoda, Smart, Subaru, Tesla, Toyota, Volkswagen, Volvo, Zero Motorcycles. Read more.
- services: OVMS, Tronity, evNotify, ioBroker.bmw, mg2mqtt, mz2mqtt, TeslaLogger, TeslaMate, Tessi, volvo2mqtt
- plugins for integrating with any charger, smartswitch, heatpump, electric heater, meter, solar- / battery-inverter or vehicle:
- Modbus, HTTP, MQTT, JavaScript, WebSocket, Go and shell scripts
- status notifications using Telegram, PushOver and many more
- logging using InfluxDB and Grafana
- REST and MQTT APIs for integration with home automation systems
- Add-ons for Home Assistant and openHAB (not maintained by the evcc core team)
You'll find everything you need in our documentation.
Technical details on how to contribute, how to add translations and how to build evcc from source can be found here.
evcc believes in open source software. We're committed to provide best in class EV charging experience. Maintaining evcc consumes time and effort. With the vast amount of different devices to support, we depend on community and vendor support to keep evcc alive.
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