🔌 Battery Fuse & Wire Gauge Calculator — Safe and Accurate DC System Sizing
The Battery Fuse & Wire Gauge Calculator helps you select the right fuse and wire size
for your e-bike, scooter, skateboard, or solar setup.
It ensures safe, efficient, and reliable operation by taking into account system voltage,
continuous and peak currents, and wire length.
⚙️ How the Tool Works
This calculator provides recommendations for two key components of any DC system:
- Recommended Fuse Size — Based on voltage, continuous current, and peak current. It also suggests slow-blow fuses for high inrush currents.
- Recommended Wire Gauge (AWG) — Calculates wire size to safely carry the current over the specified distance while keeping voltage drop under 3%.
📝 How to Use the Calculator
- Enter System Voltage (V).
- Enter Continuous Current (A) and Peak/Startup Current (A).
- Enter Wire Length (m) from battery to load.
- Select your Application Type (E-Bike, Scooter, Skateboard, Solar, BMS).
- Click “Calculate” to see recommended fuse and wire gauge.
- Optionally, Export to PDF for documentation or sharing.
💡 Why Use This Tool
- Safety First: Prevents overheating, fire, and damage from undersized fuses or wires.
- Performance Optimization: Correct wire gauge ensures minimal voltage drop for efficient operation.
- Time-Saving: No manual calculations needed for fuse sizing or AWG selection.
- Accurate & Realistic: Uses standard AWG tables factoring in continuous/peak currents, wire length, and system voltage.
- Documentation Ready: Export PDF for maintenance records or sharing with technicians.
🔍 Example
For a 52 V e-bike system with 20 A continuous current, 60 A peak current, and 1 m wire:
- Fuse: 70 A @ 60 V (slow-blow for motor inrush)
- Wire Gauge: AWG 0000
This ensures safety and reliable performance.
🧭 Summary
The Battery Fuse & Wire Gauge Calculator is essential for anyone working with e-bikes, scooters, or high-current DC systems. It provides accurate fuse and wire recommendations, enhancing safety, efficiency, and reliability while saving time and preventing costly mistakes.
