Compact AF-800S59-6K Long Service Life Kitefly

Onboard Power Supply A7

AF-800S59-6K  |  6000W Rated / 6800W Peak  |  IP65  |  Kitefly Tethered

Product Overview

The Kitefly AF-800S59-6K (A7) is the most powerful onboard module in the Kitefly tethered power supply series. Delivering a rated output of 6000W with peak capacity of 6800W at 40–60Vdc adjustable / 100A, it is engineered for the heaviest-payload tethered UAV platforms and the most demanding continuous-operation missions. It eliminates battery endurance constraints entirely — enabling continuous flight for as long as the mission demands.

Unlike other models in the Kitefly lineup which accept 360–430Vdc input, the A7 operates on a higher-voltage input range of 650–900Vdc, making it compatible with high-power ground stations rated above 6500W output. It adopts the latest soft-switching technology with closed-loop control, achieving up to 97.2% efficiency, and features an adjustable output voltage (40–60Vdc via PCB resistor) to match a wide range of UAV platform requirements including 12S and 14S battery architectures.

Key Specifications

Why Choose the A7 for Your Tethered Drone System?

The AF-800S59-6K is purpose-built for the most power-intensive tethered UAV applications — ultra-heavy-lift multi-rotor platforms, large-scale tethered lighting and firefighting systems, high-endurance aerial inspection, and any mission where 6000W+ continuous power delivery is required.

The A7's adjustable output voltage (40–60Vdc via PCB resistor) provides exceptional flexibility, supporting both 12S (44–50V) and 14S (51–58V) drone battery architectures without hardware modification. This makes it a future-proof choice for operators running mixed fleets or planning platform upgrades.

Its IP65 rating provides full dust-tight protection and resistance to water jets from any direction — the same high-protection standard as the A4, and a step above the IP55 of the A3.5 and A5. Combined with a -40°C cold-start capability, 5000m altitude rating, and three-proof PCB coating, the A7 is built to operate reliably across the full spectrum of harsh field environments encountered in Middle Eastern desert operations, South Asian monsoon conditions, and high-altitude mountain deployments.

Passive parallel current sharing allows multiple A7 units to be combined for ultra-high-power redundant configurations on the largest tethered UAV platforms.

Protection & Safety Features

• Output overcurrent protection: 180–200A threshold (hiccup mode, auto-recovery)

• Output short-circuit protection (hiccup mode, auto-recovery)

• Over-temperature protection with auto-recovery (PCB threshold ~105°C)

• Input overvoltage protection: 990–1010V

• Input undervoltage protection: 560–575V

• Passive parallel current sharing for redundancy configurations

• Insulation: Input to output 3000Vdc withstand voltage

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

• Power status indicator: 2 built-in green LEDs (on during normal operation)

Frequently Asked Questions

Q: How is the A7 different from other models in the Kitefly onboard series?

The A7 operates on a fundamentally different power architecture from the A1.5 through A5 series. While those models accept 360–430Vdc input from standard Kitefly ground stations, the A7 requires a higher-voltage input of 650–900Vdc and is compatible with ground stations rated at 6500W output or above (such as the Kitefly G7, NG7, and G15). It also offers adjustable output voltage (40–60Vdc), supporting both 12S and 14S drone platforms. With 6000W rated and 6800W peak power, it is the top-tier choice for the heaviest UAV platforms and highest-power applications.

Q: Which ground station do I need to use with the A7?

The A7 requires a tethered ground power station capable of outputting at least 6500W at 650–900Vdc. Compatible Kitefly ground stations include the G7, NG7, and G15, among others. If you are unsure whether your existing ground station is compatible, contact our team with your ground station model and output specifications.

Q: What output voltage should I set for my drone?

The A7's output voltage is adjustable between 40–60Vdc via an onboard PCB resistor. For 12S battery drones (nominal 44.4V), set output to 44–50Vdc. For 14S battery drones (nominal 51.8V), set output to 51–58Vdc. The default factory setting is approximately 58.5Vdc. Please confirm your drone's input voltage requirement before installation. Contact our technical team for guidance if needed.

Q: How long can a drone fly continuously with the A7 tethered power module?

The Kitefly tethered power system removes battery endurance as a limiting factor entirely. Unlike battery-powered drones limited to 20–40 minutes per charge, a drone connected to the A7 can fly continuously for hours or days, depending on mission requirements. Actual flight duration is governed by the drone's own motor endurance, thermal performance, and mechanical lifespan — not the power supply. For extended high-power missions, follow your drone manufacturer's maintenance recommendations.

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

The drone must carry a fully charged battery at all times during tethered flight. If ground power is interrupted for any reason, the system automatically switches to battery power with zero voltage transient drop, enabling a safe emergency landing. The A7 operates in parallel with the battery — not as a replacement for it.

Q: Is the A7 suitable for firefighting and lighting tethered UAV applications?

Yes. The A7 is specifically designed for high-power tethered applications including lighting systems, firefighting platforms, and inspection UAVs with heavy sensor or equipment payloads. Its 6000W rated output and 6800W peak capacity provide the sustained power headroom required for these demanding applications.

Q: Can multiple A7 units be used together?

Yes. The A7 supports passive parallel current sharing, allowing multiple units to be combined for redundant ultra-high-power configurations. Contact our team to discuss your specific power architecture requirements.

Q: What is the lead time and availability?

The A7 is available in stock for immediate shipment. If current stock is insufficient for your order, lead time is 2–3 weeks. Contact Ms. Susy for real-time availability and volume pricing.

Related Products

A1.5 (1500W) | A2 (2000W) | A2.5 (2500W) | A3.5 (3200W/5000W peak) | A4 (3500W/4300W peak) | A5 (4500W/5000W peak)

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