OWNER ANSWER
Why is my DOLPHIN rapid charging slower than expected?
If your DOLPHIN rapid charge is slower than expected, first compare the starting battery level and the charger’s available DC power. A cold or nearly full battery can take less power even at a high-rated charger.
- Confirm you are using the intended CCS DC connection rather than an AC post.
- Read the charging specification for your exact trim and model year. Safety note: If a plug is damaged, unusually hot, smells burnt or shows smoke or arcing, stop using it and keep clear. Repeated electrical trips need the installer; reconnecting can worsen an electrical fault.
- Check the charger for reduced output or sharing and ask the operator if it is unclear.
- Compare power and energy over the session with similar starting charge and conditions.
- Use only the battery-conditioning controls actually fitted and described for your edition.
What to expect
The session adds energy, and the comparison uses the correct trim, starting charge and conditions. A peak rating is not a constant rate: a point restriction explains that session only, while repeatedly slow suitable sessions need the checks below.
If that did not work
Use the operator for a point-specific restriction. If repeated comparable sessions across suitable sites stay unexpectedly slow, ask BYD to check charging limits, temperature management and fault history. Another suitable point during a normal journey is enough; there is no need to make a special trip to reproduce a fault.
What to note down for support: Give support the variant, start/end percentage, charger/post ID, session time, kWh and any warning.
Which figure should I compare?
Match the DOLPHIN trim and model-year specification rather than a SURF figure. Outside temperature is useful context but is not a measurement of the battery’s temperature. Charging normally slows towards a high state of charge.
Related links
Source: byd.com: owners manual (BYD UK). Checked 22 October 2026.