Connect Fronius Wattpilot with ChargeDoc
Track your charging costs with Fronius Wattpilot automatically — the integration is planned. Deep solar integration for Fronius PV system owners.
| Modeller | Wattpilot |
| Integration | WiFi + Cloud |
| Autentisering | WebSocket SHA256 |
| Max. effekt | 11/22 kW |
| Faser | 3-fasig |
| Marknad | DACH / PV |
| API-kvalitet | Experimentell |
| Status | Planerad |
Why Fronius Wattpilot and ChargeDoc belong together
The Fronius Wattpilot is not just a wallbox. It is the charging component of the Fronius solar ecosystem. When paired with a Fronius inverter and a Fronius Smart Meter, the Wattpilot knows exactly how much solar surplus is available and adjusts your EV charging accordingly.
This is powerful for reducing your electricity bill, but it also creates a tracking challenge. How much did that charging session actually cost when part of it came from your solar panels, part from the grid, and the charging power varied throughout?
ChargeDoc will solve this by reading the detailed energy data from your Wattpilot and applying smart cost calculations. Solar energy is free. Grid energy is priced at your rate. The result will be an accurate cost figure for every single session.
How the integration will work
The Fronius Wattpilot offers two communication paths, and ChargeDoc will support both.
Local WiFi via WebSocket - The Wattpilot runs a WebSocket server on your local network. ChargeDoc will connect to it directly, receiving real-time updates about charging status, power, and energy consumption. This will be the fastest method with zero cloud dependency. The connection uses a device-specific password for authentication.
Cloud via Fronius Solar.web - If you have registered your Wattpilot on the Fronius Solar.web platform, ChargeDoc will be able to access your data through the cloud API. This will allow monitoring from anywhere and will be more reliable if your local network has connectivity quirks.
Both methods provide the same core data: energy consumed per session, charging power over time, and session timestamps. The cloud method may additionally provide solar production context if your Fronius inverter is also connected to Solar.web.
Planned models
Fronius offers two Wattpilot variants:
- Wattpilot Home 11 kW / 22 kW - The wall-mounted charger designed for permanent home installation. Available in single-phase (11 kW) and three-phase (22 kW) versions. Both include a built-in energy meter and WiFi connectivity.
- Wattpilot Go 11 kW / 22 kW - The portable version with the same smart features in a transportable form factor. Ideal if you charge at multiple locations or need a mobile solution. Same API, same planned ChargeDoc compatibility.
Both models connect to your home WiFi and support the local WebSocket interface. Both can also be registered on Fronius Solar.web for cloud access.
Setting up Wattpilot with ChargeDoc
For local connection: Make sure your Wattpilot is connected to your home WiFi. Find its IP address in your router's device list or in the Wattpilot's own WiFi settings. In ChargeDoc, you will select Fronius Wattpilot, choose the local connection option, and enter the IP address along with the device password. The app will establish a WebSocket connection and begin streaming data immediately.
For cloud connection: Ensure your Wattpilot is registered on Fronius Solar.web. In ChargeDoc, you will select Fronius Wattpilot, choose the cloud option, and sign in with your Solar.web credentials. The app will sync your session history and set up automatic updates for future sessions.
In both cases, you will set your electricity rate per kWh in ChargeDoc. If you have a Fronius PV system, you will optionally be able to configure your feed-in tariff to see the value of solar energy used for charging.
Planned feature highlights
Dual connection options - Choose between local WiFi for speed and privacy, or cloud for remote access and convenience. You will even be able to switch between them depending on your situation.
Real-time WebSocket data - The local connection will stream live data to your phone. Watch your charging power, energy delivered, and cost update in real time as your car charges.
Fronius ecosystem integration - If you have a Fronius inverter and Smart Meter alongside your Wattpilot, ChargeDoc will be able to leverage the full energy flow data. See exactly how your solar production, home consumption, and EV charging interact.
Solar surplus tracking - When your Wattpilot charges in solar-surplus mode, ChargeDoc will track the split between solar and grid energy. Your cost calculation will reflect only the electricity you actually purchased.
Portable charger support - Using a Wattpilot Go at different locations? ChargeDoc will track sessions regardless of where you charge, helping you maintain a complete charging cost record.
Tax-ready reports - Generate detailed charging cost exports for tax filing. For company EV drivers in Germany, this documentation will support your home charging deduction claim with accurate, session-level cost data.
Getting the most from your Fronius setup
The Fronius Wattpilot shines brightest when it is part of a complete Fronius solar system. The inverter tells the Wattpilot how much surplus power is available, and the Wattpilot adjusts charging power dynamically. ChargeDoc will capture this entire dance, giving you a complete financial picture.
Over time, you will be able to analyze patterns: how much of your summer charging was essentially free from solar, how winter months shift the balance toward grid consumption, and whether adjusting your charging schedule could save money.
For Wattpilot owners who want to turn their charging data into clear cost insights, join the waitlist and be the first to know when it launches.
The step-by-step guide below describes the planned flow and applies once the integration is available.
Så ställer du in det
Connect via local WiFi or Fronius Solar.web
Once the integration is available, ChargeDoc will connect to your Wattpilot either directly over local WiFi using WebSocket or through the Fronius Solar.web cloud. You will choose the method that suits your setup.
Pair your Wattpilot
For a local connection, you will enter your Wattpilot's IP address and device password. For a cloud connection, you will sign in with your Fronius Solar.web account. Either way, ChargeDoc will start reading your charging data immediately.
Monitor costs alongside your PV production
ChargeDoc will track every charging session with full energy details. If your Wattpilot is integrated with a Fronius inverter, the app will capture solar surplus usage for accurate cost calculations.
Vanliga frågor
Is the Fronius Wattpilot integration available now?
The Wattpilot integration is currently planned. We are developing support for both the local WebSocket API and the Fronius Solar.web cloud API. Join the waitlist to get early access.
Should I use the local or cloud connection?
If your Wattpilot is on the same WiFi as your phone and you want the fastest response with no internet dependency, local will be the better option. If you want to monitor from anywhere, or if your WiFi setup makes local connections unreliable, the cloud option will suit you better.
Which Wattpilot models will be supported?
ChargeDoc will support the Wattpilot Home (11 kW and 22 kW) and the Wattpilot Go portable charger. Both use the same communication protocols. The integration is currently planned.
Will ChargeDoc work with my Fronius inverter data?
If your Wattpilot is connected to a Fronius inverter via Solar.web, ChargeDoc will be able to access the energy flow data to determine how much of your charging came from solar production versus grid import. This will make your cost tracking more accurate.
Gå med i väntelistan
Fronius Wattpilot-integrationen är fortfarande under utveckling. Skicka oss ett kort mejl — vi hör av oss så snart den är tillgänglig.
chargedoc@xhub.io