Zero Logs
Zero Motorcycle Knowledge Hub

Understanding Your Zero's Data

Learn how your Zero Motorcycle's diagnostic systems work. From battery chemistry to log file parsing — everything explained for riders and enthusiasts.

How Energy Flows

Click the buttons to see how power moves through your Zero in different modes

Grid
Charger
BMS
Cells
Controller
Motor
Discharging Mode

Battery power flows through the controller to the motor for propulsion

Based on Zero Motorcycles power architecture. The Sevcon controller manages power flow between the battery and the IPM (Interior Permanent Magnet) motor.

What are Zero Logs?

Zero Motorcycles store diagnostic data in binary log files on the bike's internal systems. These files contain detailed records of battery performance, riding data, charging sessions, and system events.

MBB Logs (Main Bike Board)

Motor control, temperatures, speeds, and system events

BMS Logs (Battery Management System)

Cell voltages, SOC, charging data, and battery health

Learn more about log extraction at ZeroManual - Interfacing

Sample BMS Log Entry

level 001 AH, SOC: 97%, I: 0A
L:4089, l:4076, H:4092, B:003
PT:017C, BT:031C, PV:114540
M:Bike On

This single entry contains: battery level, state of charge, current draw, cell voltages, temperatures, and operating mode.

Deep Dive Topics

Explore each aspect of your Zero's data in detail

Quick Reference Glossary

Common terms you'll encounter in Zero log data

SOC(State of Charge)
Wiki

Battery percentage remaining

BMS(Battery Management System)
Wiki

Controls charging and monitors cells

MBB(Main Bike Board)

Central controller for motor and systems

Vpack(Pack Voltage)
Wiki

Total voltage of battery pack

Regen(Regenerative Braking)
Wiki

Energy recovery during deceleration

CC/CV(Constant Current/Constant Voltage)
Wiki

Charging phases

Community Resources

Additional resources from the Zero Motorcycles community

Unofficial Zero Manual

Community-maintained wiki with extensive technical documentation, service manuals, and troubleshooting guides.

Visit ZeroManual.com

Official Zero Resources

Official owner resources, charging recommendations, firmware updates, and warranty information.

Zero Owner Resources

This is an educational resource created by the Zero community. For official information, visit zeromotorcycles.com. Technical details reference the community-maintained Unofficial Zero Manual.

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