⚡ DETERMINISTIC E-BIKE ENGINEERING ENGINE

E-Bike Compatibility Checker & Build Configurator

Select your e-bike battery, controller, motor, controls, and frame. Our deterministic engine verifies voltage safety limits, BMS current bottlenecks, communication protocols, and physical dropouts before you buy.

⚡ How the Volt-Matrix E-Bike Engineering Engine Works

Building or converting a DIY electric bicycle requires precise matching across electrical, electronic, and mechanical systems. Volt-Matrix eliminates guesswork through four levels of deterministic validation:

1. P0 Voltage Safety

Calculates full-charge voltages (54.6V for 48V, 58.8V for 52V, 84V for 72V) against controller capacitor ratings to prevent component explosion.

2. BMS Current Limits

Compares continuous battery discharge limits against controller peak shunt draw, flagging current choke and power trip risks.

3. Protocol & Pinouts

Ensures KT, Bafang UART, and Bafang CAN ecosystems are not cross-mixed, saving you from Error 30 communication faults.

4. Physical Fit & Axles

Validates rear dropout spacing (135mm vs boost), bottom bracket widths (68/73mm vs 100/120mm fat tire), and battery triangle clearance.

❓ Frequently Asked Questions

How do I know if an e-bike battery is compatible with my controller?
Two critical criteria must match: Nominal Voltage and BMS Current Rating. Your controller's rated voltage range must accept your battery's nominal voltage (e.g. 48V pack for a 48V-rated controller). Additionally, the battery's BMS continuous discharge rating (in Amperes) must be equal to or higher than the controller's peak battery current limit.
Can I use a 52V battery with a 48V controller?
In many cases, yes, but you must verify the controller's internal capacitor voltage rating. A fully charged 52V battery reaches 58.8V. If your 48V controller uses 63V capacitors, it will safely handle 52V. If the controller has 60V-rated capacitors, connecting a full 58.8V charge will trigger high-voltage lockout or blow internal MOSFETs.
What causes Error 30 communication faults on e-bike displays?
Error 30 indicates a serial communication protocol mismatch between the LCD display and the motor controller. Controllers manufactured by Kunteng (KT) only communicate with KT-LCD displays. Bafang systems use proprietary UART (round green 5-pin Higo) or CAN bus protocols. Mixing brands results in communication failure.
Does this e-bike configurator store my build on a server?
No. The Volt-Matrix engine executes 100% client-side in your web browser. All saved builds in the Garage are stored exclusively in your browser's localStorage, guaranteeing complete user privacy.