CZI TK4 Tethered Power System for DJI Matrice M400 - Unlimited Flight Time via AC Power

The CZI TK4 Tethered Power System removes the battery flight time limit from the DJI Matrice M400, enabling public safety teams, infrastructure crews, and emergency responders to maintain continuous aerial operations for as long as the mission requires.

Value Bullets:

• Unlimited airborne endurance from AC mains power - The TK4 converts single-phase AC (176-264V) into 800V high-voltage DC, transmits it via tether cable, and delivers a stable 50V at 4kW to the M400 and its payloads indefinitely -- no battery swaps, no landing windows.
• 800V transmission means lighter cable and less heat - At 800V, line current is half that of a 400V system and cable heat generation is reduced to one quarter, allowing longer tether runs without the line loss or weight penalty of lower-voltage designs.
• 4K video direct to command centre via PLC, no wireless link needed - Power line carrier communication between ground station and airborne unit delivers 100 Mbps bandwidth with high resistance to RF interference, with HDMI and Ethernet outputs feeding live 4K video directly to the command post.
• 1500W combined lighting output, grounding rod included - Simultaneously support an 800W CZI ML200 and 300W CZI GL300 for high-power night illumination, with the included grounding rod safely discharging induced voltages when operating near high-voltage power lines.

Overview and Who It's For

The CZI TK4 is a tethered power supply system designed exclusively for the DJI Matrice M400 RTK. It converts single-phase AC mains power into 800V high-voltage DC at the ground station, transmits it via reinforced tether cable to the aircraft, and steps it down to a stable 50V at 4kW output at the airborne unit -- powering both the M400's propulsion system and its mission payloads continuously for as long as AC power is available.

The 800V transmission architecture operates at half the current of a conventional 400V design, reducing cable heat generation to one quarter and allowing the use of a lighter, longer tether without meaningful line loss. The system ships standard with a 110m cable and supports optional configurations up to 200m for higher-altitude deployment scenarios.

Ground station and airborne unit communicate via PLC at 100 Mbps, delivering 4K video at high frame rates with strong resistance to RF interference -- directly to the command centre via HDMI or Ethernet. A 5.5-inch 1080p display on the ground station provides real-time system monitoring, and built-in Bluetooth and Wi-Fi allow smartphone control via a mobile device.

The TK4 supports up to 1500W of combined lighting payload output simultaneously with aircraft power -- enough to run the CZI ML200 (800W) and GL300 (300W) together in a single deployment. The included grounding rod safely discharges induced voltages when operating near energised power infrastructure, using a standard interface that accepts different rod lengths for varying ground conditions.

Note: The DJI Matrice M400 RTK is sold separately. The TK4 is not compatible with the Matrice 4T, 4E, M350 RTK, or M300 RTK. For tethered power on the Matrice M300/M350, the CZI TK3 is the correct system.

Best suited for:

• Public Safety - Extended incident scene monitoring, search and rescue lighting operations, crowd surveillance, and perimeter security where continuous airborne presence is required and battery endurance is insufficient
• Energy and Utilities - Fixed-point infrastructure monitoring, powerline and pipeline inspection posts requiring prolonged aerial coverage without landing
• Mining - 24-hour site surveillance, perimeter monitoring, and inspection of hazardous areas where battery-limited flights are operationally insufficient
• First Nations and Indigenous Communities - Emergency response lighting and remote community monitoring in situations requiring sustained aerial coverage

What's Included

• CZI TK4 Ground Station x1
• Airborne Unit x1
• 110m Tether Cable x1
• Grounding Rod x1

Training and Certification

Operating the DJI Matrice M400 RTK in Canada requires a valid Advanced RPAS Pilot Certificate. Tethered drone operations may qualify for different airspace classifications under Transport Canada regulations -- contact our Solutions team to confirm the regulatory framework for your specific deployment before going operational.

Candrone Academy offers online ground school and exam prep for pilots looking to get certified or upgrade to Advanced.

For teams deploying this system in public safety or professional contexts, Advanced RPAS Certification unlocks operations near people and in controlled airspace commonly required for municipal, SAR, and emergency services use.

• Explore Candrone Academy training
• Book a free consultation

FAQs

How long can the M400 fly with the TK4 connected? Indefinitely, provided AC mains power is available and the system is operating normally. The TK4 removes battery capacity as the flight time constraint entirely -- mission duration is limited only by power availability, operational requirements, and applicable regulations.

What AC power supply does the TK4 require? The TK4 requires single-phase AC input at 176-264V, 50/60 Hz -- standard Canadian mains power. For deployments without grid access, a generator of sufficient capacity (minimum 4.5kW continuous) can supply the ground station.

Is this compatible with the Matrice 4T, 4E, M350, or M300? No. The TK4 is designed exclusively for the DJI Matrice M400 RTK. For tethered power on the M300 or M350 RTK, the CZI TK3 is the correct system. Contact our team to confirm which tethered solution matches your platform before ordering.

Can the TK4 power lighting payloads at the same time as the aircraft? Yes. The TK4 supports up to 1500W of combined lighting payload output simultaneously with aircraft power -- sufficient to run the CZI ML200 (800W) and GL300 (300W) gimbal searchlights together in a single tethered deployment.

Do tethered operations require different Transport Canada authorisation? Tethered drone operations may qualify for different regulatory treatment than free-flying operations under Transport Canada RPAS rules. Contact our Solutions team and verify with Transport Canada before deploying the TK4 in any operational context.

Warranty and Returns

This product is covered under the manufacturer's limited warranty. Candrone's standard return and exchange policy applies.

View Candrone's Warranty and Returns Policy

For warranty claims or support, contact our team at 1-888-461-5742 or visit our Contact page.