This guide uses approximate data. Charging speeds, prices, and compatibility depend on your specific vehicle variant, station hardware, and conditions. EVcourse is not affiliated with BYD or Helen. Always check your vehicle manual and the charger screen.
Quick Overview
Step by Step
Find a Helen station
Open the Helen app or use a charging map like PlugShare to find a nearby station. Before you drive there, check that the station has an available CCS2 connector and is currently working.
Start your session
Open the Helen app, select the charger, and start the session. You can also use an RFID card.
Plug in the CCS2 connector
Take the CCS2 cable from the charger and connect it to your BYD SEAL's charging port. You should hear a click when the connector locks in. Your car's display will confirm the connection.
Charging starts
Once connected, your BYD SEAL can pull up to 150 kW. On Helen chargers (up to 200 kW), your effective maximum is 150 kW. You will see the current power and estimated time on either the charger screen or your car's display.
Charging speed is fastest when your battery is between 10% and 50%. It gradually slows as the battery fills up. This is normal and protects battery health.
When to unplug
Your BYD SEAL has an LFP battery. Charging to 100% is fine and actually recommended occasionally so the car can calibrate its range estimate. For the fastest stop on a road trip, 80% is still the sweet spot.
Charging Speed on Helen
Your BYD SEAL peaks at 150 kW DC. It uses a 800V architecture. Helen chargers go up to 200 kW, but your car's onboard limit caps you at 150 kW.
Charging from 10% to 80% takes about 36 minutes under good conditions.
Actual speed depends on several factors: battery temperature (cold batteries charge slower), your current state of charge (charging slows above 50-60%), and how many other cars are sharing the same station. If other cars are plugged in at the same location, the charger may split power between them.
Payment Options at Helen
- Helen app. Download the app, create an account, and link a payment method. Start and stop sessions from your phone.
- RFID card. Use a charging card from Helen or a roaming provider to tap and start.
Approximate ad-hoc price: 0.35 EUR/kWh. Actual prices vary by location and time. Subscriptions or roaming cards may offer lower rates.
Tips for Charging BYD SEAL on Helen
- Your BYD SEAL has an LFP battery. Charging to 100% occasionally is recommended for accurate range estimates. LFP batteries handle full charges better than NMC batteries.
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