Custom vs. Off-the-Shelf Tethered UAV Power Systems: Which One Does Your Project Need?

Quick answer: Use an off-the-shelf tethered power system when the aircraft voltage, continuous and peak power, tether length, ground input, connectors and installation all match an existing configuration. Custom engineering becomes useful when one or more of those interfaces do not match the aircraft or mission.

A tethered UAV project often begins with a simple question: can an existing ground station and airborne module be used, or does the system need to be customized? The answer should not be based on whether custom hardware sounds more advanced. It should be based on interface compatibility across the complete power chain.

We manufacture standard airborne power modules and ground power stations, but many industrial projects involve aircraft, payloads, cable lengths or site power conditions that do not fit a fixed configuration. The practical goal is therefore to use standard equipment wherever it fits and customize only the parts that materially affect compatibility, reliability or deployment.

What Counts as an Off-the-Shelf Tethered Power System?

An off-the-shelf system uses published modules, ground stations and cable arrangements without requiring a project-specific electrical or mechanical redesign. This is usually the fastest path when the aircraft and operating conditions already fall inside the documented specifications.

• The airborne DC/DC output matches the aircraft power bus or battery-equivalent voltage.
• The module has enough continuous power and appropriate short-duration headroom for the aircraft and payload.
• The tether length and transmission voltage fit the required operating height and power level.
• The site has the AC input required by the selected ground power station.
• The connectors, mounting points, airflow and installation space are workable without redesign.

When Standard Hardware Is Usually the Better Choice

Standard equipment is not a compromise when it already fits the requirement. It normally reduces engineering time, simplifies documentation and makes it easier to compare the proposed system with published specifications.

• The project uses a commonly supported aircraft voltage architecture.
• The required power class is already covered by an existing module and ground station.
• The standard tether length is suitable for the mission.
• No unusual data interface, connector or enclosure requirement is present.
• The customer wants to evaluate a known configuration before considering deeper integration.

When Custom Engineering Becomes Necessary

Customization should solve a real interface or mission problem. The most common triggers are voltage, power, tether, mechanical integration, communication and site-power constraints.

1. The aircraft voltage does not match a listed module

The airborne module must provide an output compatible with the aircraft electrical architecture. A module with sufficient kilowatts is still unsuitable if its regulated output voltage does not match the aircraft bus. A project may therefore require a different output voltage, input range or current capability.

2. Continuous and peak power are outside a standard configuration

A tethered UAV is a dynamic load. Stable hover demand, payload operation and transient peaks can be very different. Custom sizing may be required when the aircraft sits between published power classes, has unusually high transients, or requires a specific thermal margin.

3. The tether length or cable architecture changes

Longer tethers increase suspended cable mass and electrical loss. A project may need a different conductor arrangement, higher transmission voltage, a different reel configuration, or a power-and-fiber hybrid tether. Cable length should therefore be treated as an engineering input, not simply an accessory choice.

4. Connectors and mechanical interfaces do not match

Industrial UAVs use different battery connectors, bus interfaces, mounting points and available installation volumes. Custom work may include connector adaptation, cable routing, brackets, clamps, enclosure changes or other mechanical integration.

5. The available ground power is different

The ground station must be compatible with the actual site supply. A project using single-phase mains, three-phase industrial power, a generator or another mobile source may need a different ground-side configuration. The available voltage, frequency, phase and source capacity should be confirmed before equipment is selected.

6. The mission requires optical data or other interfaces

Some applications need only electrical power. Others require a fiber-optic path for video, Ethernet, serial communication or another data interface. Adding optical fiber affects the tether, reel, optical rotary connection and interface electronics, so it should be considered as part of the architecture from the beginning.

Custom Does Not Mean Rebuilding Everything

A common misconception is that a customized tethered system must be designed from zero. In practice, many projects start with an existing airborne module or ground station and modify only the parts that need to change.

• Use an existing power module but change the connector or mounting.
• Use a standard ground station but specify a different tether length.
• Use a listed power architecture and add fiber-optic integration.
• Use standard electrical hardware with a project-specific enclosure or installation interface.
• Use an existing voltage class but adjust the system around a different aircraft or payload.

A Practical Standard-vs-Custom Decision Table

What Information Should Be Sent for a Custom Review?

A useful first review does not require a complete engineering package. Start with the information that defines the interfaces:

• Aircraft model or electrical specification
• Battery voltage range or DC bus requirement
• Continuous operating power and known peak power
• Payload and mission equipment
• Required operating height and tether length
• Available AC power at the site
• Data or fiber requirement
• Connector, mounting or enclosure constraints
• Equipment that must remain in the system

FAQ

Is a custom tethered UAV system always better than a standard one?

No. A standard configuration is usually preferable when it already matches the aircraft and mission. Customization is valuable when it solves a real compatibility or integration constraint.

Can only the airborne module be customized?

Potential customization can involve the airborne module, ground station, tether cable, connectors, mounting or data interfaces. The appropriate scope depends on the project.

Can a standard system be used as the starting point for OEM or ODM cooperation?

Yes. Existing hardware can provide a practical engineering baseline for private labeling, interface changes or joint development, subject to the agreed project scope.

Discuss Your Tethered UAV Project

We develop tethered UAV power systems around the aircraft, payload, operating height and available ground power. For a preliminary review, send the aircraft model or electrical specification, continuous and peak power demand, required tether length, mission application and destination country.