TilgjengeligLokalt WiFi

Connect Tesla Wall Connector with LadeKosten

Track your charging costs with the Tesla Wall Connector Gen 3 automatically. Local WiFi connection, no authentication needed — works with any EV.

Modeller	Gen 3
Integrasjon	Lokalt WiFi
Autentisering	None (open)
Maks. effekt	22 kW
Faser	3-faset
Marked	Global
API-kvalitet	Begrenset
Status	Tilgjengelig

Tesla Wall Connector in Europe

The Tesla Wall Connector Gen 3 is available in Europe with a Type 2 connector and charges not only Tesla vehicles, but any electric car that supports the European Type 2 standard. With up to 22 kW charging power (three-phase), it's a powerful wallbox for home use.

Whether you drive a Tesla Model 3, a VW ID.4, a Hyundai Ioniq 5, or a BMW i4 — the Wall Connector charges them all, and LadeKosten documents the costs.

Simplest setup of all wallboxes

The Tesla Wall Connector makes it especially easy: No registration, no cloud account, no API key, no authentication. The Wall Connector provides two HTTP endpoints on the local WiFi that are freely accessible:

/api/1/vitals — Real-time data: voltage, current per phase, grid frequency, session energy, vehicle status
/api/1/lifetime — Lifetime statistics: total energy in Wh, number of charge starts, uptime

Setup:

Connect your smartphone to the WiFi
Open LadeKosten
Wall Connector is automatically detected
Done — monitoring is running

No password to remember, no API key to generate, no OAuth login page.

What LadeKosten captures

For every completed charging session, the app documents:

Energy charged in kWh (from session_energy_wh or lifetime energy delta)
Calculated electricity costs based on your individual rate
Charging duration of the session in seconds
Grid voltage and current per phase (when vitals available)
Total energy since commissioning (from energy_wh)
Charge starts — how often your car has been charged in total

The app calculates current charging power from voltage × current across all three phases — so you know exactly how many kW are flowing.

How LadeKosten detects your charging sessions

Tesla Wall Connector Session Detection

Honest about the limitations

Transparency matters to us. The Tesla Wall Connector has some quirks:

API doesn't always respond during charging

The /api/1/vitals endpoint can become unreachable during active charging — this is known Tesla Wall Connector behavior. LadeKosten handles this gracefully: if vitals doesn't respond, the app uses the lifetime data as a fallback. Recording of the completed charging session is unaffected.

No session history

The Wall Connector doesn't store charging history in its API. LadeKosten compensates by calculating the difference in the lifetime energy counter between two polls. From the moment of setup, every charging session is documented without gaps.

Read-only and no authentication

The API is read-only — LadeKosten cannot control the Wall Connector. The lack of authentication means any device on the same WiFi can read the data. For a private home network, this is generally not an issue.

Maximum privacy

All communication happens locally on your WiFi. Your charging data never leaves your home network:

No Tesla account needed — completely independent from Tesla services
No cloud service — everything works offline
No third-party servers — your data stays private
No tracking mechanisms in the communication

Document charging costs for tax

Even with the Tesla Wall Connector, LadeKosten creates tax-ready documentation:

PDF reports for your employer
DATEV export for your tax advisor
GoBD-compliant records with audit log
Monthly overviews with costs and energy amounts

For company car drivers and freelancers who charge their Tesla Wall Connector at home, this is the easiest way to document charging costs.

Conclusion

The Tesla Wall Connector Gen 3 is one of the most popular wallboxes worldwide — and with LadeKosten you document your charging costs automatically. Simplest setup without any authentication, works with any EV (not just Tesla), and maximum privacy through purely local communication. The Tesla API limitations are known and handled gracefully by LadeKosten.

Slik setter du det opp

Connect to the same WiFi

Make sure your smartphone and your Tesla Wall Connector Gen 3 are on the same WiFi network.

Detect wallbox automatically

Open LadeKosten and start the search. The app finds your Tesla Wall Connector on the local network — no password or API key needed.

Start monitoring

Tap on your Wall Connector and confirm. From now on, all charging sessions are automatically captured after completion.

Ofte stilte spørsmål

Which generation of the Tesla Wall Connector is supported?

LadeKosten supports the Tesla Wall Connector Gen 3. It provides a local HTTP API over WiFi with the endpoints /api/1/vitals and /api/1/lifetime. Older generations without WiFi are not supported.

Does it work in Europe with Type 2 connector?

Yes. The Tesla Wall Connector Gen 3 is available in Europe with a Type 2 connector and charges any EV that supports this standard — not just Tesla. Whether VW ID.4, BMW iX, Hyundai Ioniq 5 or Mercedes EQA: LadeKosten captures charging data regardless of vehicle manufacturer.

Can I see charging power during an active session?

The Tesla Wall Connector's local API has a known limitation: the /api/1/vitals endpoint may not respond during active charging. LadeKosten detects this and uses the lifetime data (/api/1/lifetime) as a fallback. Recording of the completed charging session still works reliably.

What are the limitations?

The API is read-only (no controlling the wallbox), there's no authentication (any device on the WiFi can read), no session history (LadeKosten builds its own), and limited live data during charging. For the core function — documenting charging costs — this is perfectly sufficient.