ETERNAL WATT · LIVESTOCK VENTILATION

Solar Livestock Ventilation Fans

for Farms That Cannot Afford to Stop

Ventilation never stops in livestock farming — and neither does the sun. Eternal sizes the solar array to actual average fan load (not peak), so you get maximum solar savings without over-investing in panels or batteries. Biosecurity and lower bills, together.

  • Non-stop ventilation
  • Average-load sizing
  • AC/DC backup
  • Optional safety storage
A large poultry house with on-site solar panels and rows of exhaust fans, showing solar-first continuous ventilation
Solar first by day · Lower grid use for continuous ventilation

SOLUTION · SOLAR NEGATIVE FAN SYSTEM

From real-time grid support to outage airflow and load-side isolation

The opening scene shows solar-first daytime operation. The three capabilities below address stable power, outage response, and practical deployment to improve ventilation-system resilience.

Solid green · Solar power Double amber · Grid power Solid teal · Load output

REAL-TIME HYBRID POWER

01

When solar is insufficient, the grid completes the required ventilation power

When changing cloud cover reduces solar output, grid power fills the load gap at the controller in real time, keeping the fans stable within the configured operating range.

Solar supplies 80 percent and the grid supplies 20 percent while exhaust fans maintain stable operation

OUTAGE RESILIENCE

02

Keep ventilating on sunshine during a grid outage; storage is optional

During a daytime grid outage, the system can adjust fan operation to available on-site solar power. Optional storage can provide short-term emergency support for critical fans at night.

With the grid line visibly interrupted, daytime solar continues driving critical fans while optional storage supports short nighttime emergencies

LOAD-SIDE OFF-GRID

03

Hybrid input, isolated load output—without grid-export approval

Solar and grid power cooperate only at the energy-management input. The output feeds an independent fan load and does not export power back to the public grid.

Solar and grid power combine at the controller input while the output independently feeds the fan load without exporting to the public grid

CONFIGURATION · RESILIENCE LEVEL

Configure everyday savings and outage protection separately

The standard configuration covers daytime solar use and real-time grid support. Add storage only when the project requires nighttime or longer-duration emergency ventilation, sized to critical fan count and backup duration.

Standard

No storage: daily savings + daytime solar emergency mode

For farms with a relatively stable grid connection that mainly want to reduce purchased electricity for continuous ventilation.

  • Solar first, with real-time grid support
  • Maintain essential ventilation from available solar during daytime outages
  • No promise of continuous operation at night or in very low light
Enhanced backup

Optional storage: extend support for critical fans

For projects with defined nighttime outage or longer emergency-duration requirements.

  • Prioritize designated critical fan circuits
  • Size by load power, backup duration, and usable battery capacity
  • Include fire safety, maintenance, and lifecycle management

Storage is not standard. Define the farm's risk level and emergency objective before deciding whether to add it.

SOLAR NEGATIVE FAN SYSTEM · LEARN MORE

Explore the complete solution and product information

Visit the Eternal Watt website to learn more about solar exhaust-fan applications, product configurations, and project support.