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PEV Engineering & Diagnostic Tools
Free, open-access calculators and troubleshooting utilities designed to help DIY builders, riders, and technicians diagnose and build personal electric vehicles.
Calculator
PEV Battery Range & Voltage Calculator
Calculate realistic range (km/mi), watt-hour capacity, full charge voltages (24V to 72V), charge times, and multimeter state-of-charge reference tables.
Diagnostics
Interactive Error Code Diagnostic Finder
Instant interactive lookup for Xiaomi, Segway-Ninebot, and Bafang error codes. Read multimeter test points, component causes, and direct DIY repair links.