Onboard Power Supply A2 (AF-400S48-2K) – 2000W Tethered UAV Power Module

The Kitefly AF-400S48-2K is a high-efficiency onboard power supply designed for tethered drone systems requiring higher power output. It converts high-voltage ground power (360–400Vdc) to stable 48Vdc/35A output, with a rated power of 1680W and peak power of 2000W, enabling unlimited flight endurance for professional UAV operations with heavy payloads.

Key Specifications

· Model: AF-400S48-2K

· Input Voltage: 360–400Vdc (maximum limit: 420Vdc)

· Output Voltage: 46.5–49.5Vdc (typical 47.5Vdc)

· Output Current: 35A (max 40A)

· Rated Power: 1680W | Peak Power: 2000W

· Efficiency: up to 97.5%

· IP Rating: IP55

· Operating Temperature: -40°C to +55°C

· Maximum Altitude: 5000m

· Dimensions: 148 × 63 × 55mm (L × W × H, excluding cable)

· Weight: ≤800g

· MTBF: ≥100,000 hours

· Warranty: 1 Year

· MOQ: 1 unit | Availability: In Stock (2–3 weeks lead time if out of stock)

Why Choose the A2 for Your Tethered Drone System?

The AF-400S48-2K is engineered for demanding tethered UAV applications where 48V architecture and higher power output are required — including multi-sensor surveillance platforms, tethered lighting systems, and heavy-payload inspection drones. Its IP55 weatherproof rating and -40°C cold-start capability make it suitable for deployments across extreme environments, from Middle Eastern desert heat to high-altitude mountain operations.

Key engineering advantages include seamless battery switchover with zero voltage transient drop, three-proof PCB coating for humidity and corrosion resistance, and a passive parallel current-sharing design that supports redundancy configurations.

Protection & Safety Features

· Output overcurrent, short-circuit, and overvoltage protection (auto-restart after lockup)

· Over-temperature protection with self-recovery

· Input overvoltage protection: 435–445V

· Input undervoltage protection: 290–305V

· Insulation: Input to output 3000Vdc withstand voltage

· EMC compliant: IEC61000-4-5 Level 3 (Surge), EN55022 Class A

Frequently Asked Questions

Q: What is the difference between the A2 and the A1.5? 

A: The A2 (AF-400S48-2K) outputs 48Vdc at up to 2000W peak power, making it suited for heavier UAV platforms and 48V drone architectures. The A1.5 (AF-400S24-1.5K) outputs 24Vdc at 1500W and is designed for lighter 24V systems. Please confirm your drone's voltage requirement before selecting a model.

Q: Why does the drone need to take off with a fully charged battery? 

A: The drone must carry a fully charged battery throughout tethered flight. If ground power is interrupted for any reason, the drone automatically switches to battery power for a safe emergency landing. The onboard power supply works alongside the battery — not as a replacement for it.

Q: Is the A2 suitable for high-temperature environments like the Middle East or India? 

A: Yes. The A2 is rated for operating temperatures up to +55°C with forced air cooling, and carries an IP55 weatherproof rating. For extreme heat deployments, we recommend confirming your installation's thermal management setup with our technical team.

Q: Can the A2 operate at high altitude?

 A: Yes. The AF-400S48-2K is rated for operation up to 5000m altitude, making it suitable for highland and mountainous deployment environments.

Q: Does the A2 support redundancy configurations?

 A: Yes. The A2 supports passive parallel current sharing, which allows multiple units to operate in a redundancy configuration for mission-critical applications.

Q: What is the lead time and availability? 

A: The A2 is available in stock for immediate shipment. If current stock is insufficient, lead time is 2–3 weeks. Contact Ms. Susy at susy@tetheredsystem.com and Whatsapp +86 19952400441 for real-time stock status and volume pricing.