evcc is an open-source energy management system focused on electromobility, optimizing EV charging with solar PV surplus or cheap grid power for homeowners with electric vehicles.

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🚀 Overview

evcc is an extensible, open-source EV Charge Controller and home energy management system that provides local, cloud-independent control of your EV charger, smart plug, or wallbox. It integrates with PV inverters, home batteries, energy meters, and vehicles to make intelligent charging decisions based on real-time data like solar production, grid prices, and battery status.

This project solves the problem of inefficient energy use in homes with solar panels and EVs by dynamically adjusting charging power to maximize self-consumption of PV surplus, reducing electricity bills and grid load. It also supports charging during periods of high renewable grid share or low dynamic tariffs.

Built for EV owners, tinkerers, and energy-conscious households with some technical aptitude, evcc was created by a community to offer flexible, manufacturer-independent smart charging without vendor lock-in or cloud reliance.

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✨ Key Features

• Solar Charging: Automatically starts and adjusts EV charging to match PV surplus power, maximizing self-sufficiency and solar utilization.
• Dynamic Grid Charging: Optimizes charging based on electricity prices from dynamic tariffs or high renewable grid shares, with configurable plans and limits.
• Extensive Device Support: Compatible with hundreds of chargers (e.g., ABB, Tesla, Alfen), vehicles (BMW, VW), inverters, batteries, and meters via plugins (Modbus, HTTP, MQTT, JavaScript, etc.).
• Advanced Integrations: Vehicle SoC monitoring, battery control, load management for multiple EVs/PV systems, smart home links (Home Assistant, openHAB), and session tracking with costs/solar share.
• Optional: EEBus/OCPP/EEBUS support, notifications (Telegram), logging (InfluxDB/Grafana), REST/MQTT APIs.

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🛠 Tech Stack

• Frontend: Vue.js, TypeScript, CSS
• Backend: Go
• Database: Optional InfluxDB, Redis (for caching)
• Auth: Local access (no authentication required)
• Hosting: Self-hosted (Raspberry Pi, Docker, Synology NAS, Linux/Windows/macOS)

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👥 Who Is This For?

This project is useful for:

• EV owners with solar PV systems who want to charge primarily from self-produced energy
• Households with dynamic electricity tariffs looking to minimize costs
• Tinkerers and developers building custom energy management with plugins and APIs

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📸 Screenshots / Demo

• Live demo: https://demo.evcc.io/
• GitHub: https://github.com/evcc-io/evcc

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🔥 Project Status

• 🟢 Actively building

Last updated: 2026-03-24

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❓ FAQ

Is this project free?

Yes — Open Source (MIT license) (Free to use, self-host; optional sponsoring for premium features/hardware support.)

Is the source code available?

Yes — https://github.com/evcc-io/evcc

Can I contribute?

Yes — File issues/PRs on GitHub, join discussions/forum at https://github.com/evcc-io/evcc/discussions, chat on Slack https://evcc.io/slack, contribute code, translations, device integrations, or sponsor hardware.

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📬 Contact & Links

• Website: https://evcc.io
• GitHub: https://github.com/evcc-io/evcc
• Slack: https://evcc.io/slack
• Email: info@evcc.io

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