Last Updated 3 weeks ago
Definition
Genny is the informal, shortened term for a generator used on a film or television set to supply electrical power. The term is widely used in casual on-set communication and refers to portable or towable power units that provide electricity when grid power is unavailable, insufficient, or impractical for production needs.
On set, “genny” is standard crew slang. Phrases like “run it off the genny,” “kill the genny,” or “move the genny farther back” are commonly heard and understood across departments.
Role on a Film Set
Gennies are a core component of production power infrastructure, especially on location shoots. They supply electricity for lighting, camera equipment, video village, sound, and support systems when house power cannot handle the load or when shooting outdoors or in remote areas.
Generators allow productions to work independently of existing electrical systems, giving greater control over power stability and distribution. This independence is essential for night exteriors, large lighting setups, and locations where tying into local power is restricted or unsafe.
On most professional sets, generators are positioned away from set to reduce noise and fumes, with power run via distribution cables to the working area.
Types of Generators Used in Production
Film sets use several types of generators depending on scale and requirements.
Tow generators are large, trailer-mounted units capable of powering extensive lighting and equipment loads. These are common on features, television, and large commercial shoots.
Portable generators are smaller units used for lightweight setups, remote shots, or small crews. These are more common on documentaries, indie projects, or quick inserts.
Inverter generators are valued for cleaner, more stable power output and lower noise, making them suitable for sensitive electronics and sound-critical environments.
Regardless of size, generators used on professional sets are selected based on power capacity, reliability, and noise profile.
Departmental Responsibility and Safety
Generators are typically overseen by the electrical department, with electricians responsible for setup, operation, load management, and shutdown. Proper grounding, cable management, and load balancing are critical for safety and equipment protection.
Safety considerations include exhaust placement to avoid carbon monoxide exposure, maintaining clear access around the generator, securing cables to prevent trip hazards, and monitoring power loads to prevent overloads or voltage drops.
Only trained crew members should operate or adjust generators. Improper handling can cause equipment damage, electrical hazards, or serious injury.
Noise and Placement Considerations
One of the main challenges with gennies is noise. Even quiet units produce sound that can interfere with dialogue recording. For this reason, generators are often placed far from set and shielded using distance, terrain, or sound barriers.
Sound and electrical departments must coordinate closely. Moving or adjusting a genny to reduce noise may affect cable runs, power loss, or safety clearances. These decisions are made collaboratively to balance audio quality and electrical reliability.
On well-run sets, generator placement is planned during prep to minimize issues during shooting.
Common Misconceptions
A common misconception is that a genny is just a backup power source. In reality, many productions rely entirely on generators as their primary power supply.
Another misconception is that all generators are loud and dirty. Modern units, especially inverter generators, are significantly quieter and cleaner than older models.
It is also incorrect to assume that smaller productions do not need gennies. Even modest lighting setups can exceed the capacity of household circuits, making generators necessary.
Why Gennies Matter
Power is the foundation of modern production. Without reliable electricity, lighting cannot function, cameras cannot operate, and support systems fail. Gennies make controlled, scalable power possible anywhere a shoot needs to happen.
Understanding what a genny is, how it is used, and why it must be managed carefully is essential for working professionally on set. Though often kept out of sight, generators are one of the most critical pieces of infrastructure in film and television production.
Related Terms
[Generator] A machine that produces electrical power.
[Electric Department] The crew responsible for lighting and power distribution.
[Power Distribution] The system used to route electricity safely to equipment.
[Location Shoot] Filming conducted outside of a controlled studio environment.