This content was compiled automatically and has not yet been reviewed by a technician. For reference only.
For reference only. Always confirm part numbers and procedures for your specific vehicle.
Charging and controls
2026 SEALION 7 charging stops early: check the SOC limit and EVCC update functions first
Korean MY26 base SEALION 7 OTA records distinguish SOC limits, current settings and update stages. Check settings before diagnosing EVCC or OBC faults.
A Korean 2026 model-year base SEALION 7 is plugged in at home overnight, but charging has ended below the level the owner expected. Checking the charge limit and software functions first helps distinguish the problem and avoids reporting a setting difference directly as EVCC or OBC damage.
The two updates describe different stages
In BYD Korea's base-model OTA records, V3.1.1 is an EVCC pre-update preparing for later charge-limit and current-limit functions, with no user-perceptible change at that time. V3.1.2 lists the SOC charge limit, current limit and stop-charging functions.[Factory update record][T02]
“Updated” alone is therefore insufficient on a work order. Record the actual software state and whether the corresponding functions are present, rather than assuming one update gave the vehicle all settings. Mention of EVCC in the notice also does not establish a uniform EVCC hardware defect.
Distinguish the charge target from the current limit
The notice gives an adjustable SOC range of 70%—100% and a current limit from 6A to the maximum offered by the function.[Factory update record][T02] The former is a charge target and the latter a current setting; they should not be combined into a single “charging speed” issue.
For example, if the owner expects 100% but the actual setting is 80%, first check whether charging ended at the set value. If the complaint is slow charging, separately record the current limit and charging method used. This is the starting point for distinguishing complaints, not proof of normal operation or damage from any particular charge or current value.
Retain the end-of-charge information before identifying parts
Useful records include the expected target, on-screen setting, SOC at the end, any abnormal message, charging equipment used and vehicle software state. Distinguish ending at the target from interruption accompanied by an abnormal message so the repairer has a basis for further checks.
The factory function description does not require EVCC, OBC or other assembly replacement whenever charging ends early. Procurement should follow diagnosis; an update name is not a component fault finding.
Scope and verification
This article covers only the original Korean MY26 base BYD SEALION 7, with model year established by the Korean official release. It excludes later Plus and Dynamic AWD versions and other markets.[Model-year release][T01] V3.1.1 and V3.1.2 are historical function records, not claims about the latest version. They do not support installing older software or assuming every MY26 vehicle has been updated.
No public data was available in the reviewed material for software applicable to the current vehicle, specific setting boundaries for AC/DC and other charging methods, maximum selectable current, EVCC/OBC diagnosis and replacement criteria, OE numbers, separate parts availability or interchangeability. [To be verified] Verify compatibility or interchangeability using the VIN and local Korean manufacturer parts catalogue.
For charging-control components, use the parts enquiry page.
[T01]: https://www.bydauto.kr/brand/news-view/52
[T02]: https://www.bydauto.kr/service/ota-update?modelCode=BYD0019&trimCode=UKEDH-10