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Keeping a cotton farm's office and telemetry online

A modern cotton farm runs on data: water orders, irrigation telemetry, soil probes and crop reports. When the office goes dark, the farm loses its eyes.

The quiet backbone of a cotton farm

Cotton farms on irrigated country in New South Wales and Queensland manage water carefully. The farm office runs computers for water accounting and agronomy, a radio base for staff and contractors, a satellite or wireless internet link, and the receivers for irrigation telemetry and soil moisture probes spread across fields. During picking, the office coordinates pickers, module trucks and the gin. When a summer storm takes out the power, all of that goes with it, even though the paddocks keep needing attention.

What it would keep running

  • Office computers and servers
  • Radio base station
  • Internet link and router
  • Irrigation telemetry receivers
  • Soil moisture probe gateway

Instant switch-over for data

The UPS-mode inverter keeps computers, radios and telemetry receivers running without a reset when the grid drops. A LiFePO4 battery covers the first moments, and a fuel cell takes the steady load from hydrogen stored at 30 bar or less. Hydrogen is made overnight on off-peak power or from wind and keeps for weeks. Office and comms loads are small, so the store lasts a long time.

How it works →
The H2OME loop: an electrolyser splits water into hydrogen, the hydrogen is stored in a tank for weeks, a fuel cell turns it into electricity for your home, and the water returns to the loop.

What is not a fit

Cotton irrigation pumps lifting water from rivers and storages are large, often far beyond 15 kW, and the gin is an industrial plant well outside what this system is designed for. Round-trip efficiency is 30% or less, so powering those from hydrogen would not make sense. The fit here is the office, comms, telemetry, and perhaps the homestead and workshop on the same supply.

Questions

Can it run the farm's irrigation pumps?

No. Cotton irrigation pumps are very large loads. The system is designed for office, comms and telemetry, and possibly the homestead and workshop within 15 kW continuous. Pumps of that size need a dedicated supply of their own.

Will water records be lost in an outage?

Not because of power. With an instant switch-over, computers and telemetry keep running and logging. Your water accounting stays continuous through the outage, and irrigation telemetry keeps reporting so you can still see what is happening in the fields.

Can it also cover the homestead?

Often, yes. Office and comms loads are small, leaving room within 15 kW for the house. Air conditioning in summer is the main thing the pilot would check, since a hot afternoon with every unit running sets the peak the system must carry.

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