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Farm Operations, Facilities & EquipmentDairy Farm Electricity Use
Electricity runs the cooling, milking, ventilation and lighting on a dairy. Knowing where it goes is the first step to controlling the cost.
Key points
- List your major electrical loads and track them over time.
- Learn your rate structure and ask your utility about programs.
- Maintenance and leak repair are the cheapest savings.
- Use a licensed electrician and follow safety guidance.
Where the power goes
On most dairies, a few systems use the most electricity: milk cooling, vacuum pumps, water heating, ventilation and lighting. The mix differs by barn type, climate and herd size.
Walk the farm and list every major electric load, with its horsepower or rating and how many hours it runs. That list becomes your starting point for saving.
- Milk cooling and refrigeration
- Vacuum pumps and milking equipment
- Water heating for washing
- Fans, curtains and ventilation
- Lighting in barns and parlors
- Manure and feed handling motors
Reading your electric bill
Bills usually include a charge for energy used and may include charges tied to peak demand. Rate structures differ between utilities, so what applies to your neighbor may not apply to you.
Call your utility and ask for an explanation of your rate class and any programs for agriculture. Ask whether time-of-day pricing is available and how it would affect your milking schedule.
Low-cost ways to reduce use
Many savings are simple maintenance. Dirty fans, worn belts and leaky ducts waste energy, and a clean, well-tuned system runs more efficiently.
Turn off equipment that is not needed, and repair water leaks that make pumps run longer. Small habits add up across a year.
- Clean fan blades and louvers on a regular schedule
- Keep condenser coils on cooling equipment clean
- Fix leaking hot water lines
- Use timers or sensors where they suit the barn
- Replace worn belts and bearings
Equipment upgrades worth discussing
Some upgrades can reduce energy use, such as heat recovery from milk cooling for water heating, variable speed drives on vacuum pumps and efficient lighting. Whether they pay off depends on your farm and your utility rates.
Ask suppliers and your extension office for case studies from farms like yours. Ask your utility about rebates or technical help before you buy.
Managing peak loads
Running many large motors at the same time can raise your peak demand. Staggering start times for large loads, such as water heating and wash cycles, may reduce peaks where demand charges apply.
Talk with your electrician and utility about what is practical. Never bypass a safety device or overload a circuit to save a few dollars.
Electrical safety on the farm
Dairies are wet, dusty and corrosive, which is hard on wiring. Damaged cords, exposed wires and poor grounding create shock and fire hazards for people and cows.
Hire a qualified electrician for any wiring work, and follow manufacturer, OSHA and local electrical code guidance. If cows seem uneasy near water bowls or metal equipment, have the system checked by a professional.
- Inspect cords and plugs for damage
- Keep panels clear and dry
- Use fittings rated for wet locations
- Never use a damaged extension cord
- Have wiring inspected on a regular schedule
Tracking and common mistakes
Track monthly use and cost, and note changes in weather, herd size or equipment. If your bill jumps, you will have clues about why.
Common mistakes include ignoring maintenance, buying equipment without asking about rebates, guessing at causes of high bills and doing electrical work without a license. Ask for help early.
Sources and further reading
Organization homepages are linked so you can search them for current guidance on this topic.