Converted 1993 Stumpjumper to have Bafang BBS02 750 W with Hailong 48 V battery
Symptoms:
Mostly: surging/deceleration at level 2 (or any other level). Charge level drops, increases without heavy loading – even at coasting.
Occasionally: powers off when coming to a stop.
Noted: powering up: display sometimes takes long time (10+ secs) to indicate full charge.
Actions taken:
Tested Battery: full voltage
Cleaned: Connectors with topical fluid cleaner
Mounted on bike stand for testing after cleaning connectors: power up normal, stepping for 0-5 ok.
After bike stand test, road test. Fails with surging/deceleration, and charge level drops, increases without heavy loading.
Suggestions????
Additional questions: is there an inexpensive controller tester that can test Bafang’s controller such as
Amazon.com: ZHANGLI E-Bike Tester 24V/36V/48V/60V/72V Brushless MotorTester with Indicator, Portable Riding Quick Battery Powered Spared Device Tester Controller : Sports & Outdoors
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