Vertical farming electricity is one of the most important operating costs in indoor vertical farming.

Unlike a greenhouse, an indoor vertical farm receives little or no useful sunlight. The farm must electrically provide the light crops need for photosynthesis while also controlling temperature, humidity, airflow, irrigation and nutrient delivery.

That makes vertical farm electricity consumption closely connected to both crop performance and profitability.

But how much electricity does an indoor vertical farm actually use?

There is no single number that applies to every facility. Electricity demand changes with crop type, growing density, light intensity, photoperiod, LED efficiency, HVAC design, climate, dehumidification strategy and, importantly, crop yield.

A 2025 review of vertical-farming energy efficiency found reported electricity consumption for lettuce production commonly around 10–18 kWh per kilogram of fresh product, while estimating that more advanced systems could potentially approach roughly 3.1–7.4 kWh/kg as equipment and operating strategies improve.

Understanding where those kilowatt-hours go is the first step toward reducing them.

Why Does Indoor Vertical Farming Use So Much Electricity?

An indoor vertical farm is effectively creating an artificial growing environment.

Instead of relying primarily on sunlight, outdoor temperatures, rainfall and natural air movement, the facility has to provide or manage many of those conditions mechanically.

Electricity may therefore be required for:

• LED grow lights;
• cooling and heating;
• dehumidification;
• ventilation and circulation fans;
• irrigation pumps;
• nutrient dosing equipment;
• water-treatment systems;
• environmental sensors;
• control systems;
• automation;
• post-harvest equipment; and
• other building loads.

The result is that indoor farming energy consumption can be considerably higher than in outdoor production.

At the same time, comparing farms solely by total electricity use can be misleading. A larger facility will naturally consume more electricity than a smaller one.

A more useful metric is:

Specific electricity consumption = total electricity consumed ÷ kilograms of marketable crop produced

This is usually expressed as:

kWh/kg of fresh product

For example, if a farm consumes 120,000 kWh while producing 10,000 kg of marketable lettuce:

120,000 kWh ÷ 10,000 kg = 12 kWh/kg

That number can then be used to compare production periods, facilities and electricity prices.

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Energy efficiency is a critical yet challenging key performance indicator for vertical farming.

How Much Electricity Does a Vertical Farm Use?

For lettuce, a reasonable starting range from recent literature is approximately 10–18 kWh/kg, although individual systems may operate outside that range.

Real-world measurements demonstrate how much facility design matters.

One experimental vertical-farming system producing lettuce recorded approximately 7.63 kWh/kg of harvested lettuce. Electricity consumption was divided approximately as follows:

• lighting: 49.9%;
• HVAC: 40.4%; and
• automation and irrigation: 9.7%.

Another vertical-farm model calculated 11.34 kWh/kg for lettuce, but in that case lighting represented approximately 78% of electricity demand and dehumidification another 19%.

The very different breakdowns illustrate an important point:

There is no universal vertical-farm energy profile.

Two farms producing the same crop can have very different electricity consumption because of differences in LEDs, growing recipes, HVAC systems, outside climate, building insulation, water systems and crop productivity.

LED Grow Lights: Usually the Largest Electrical Load

Lighting is usually one of the largest components of vertical farm electricity consumption.

Plants require a certain quantity of photosynthetically active radiation to grow. Indoor farms provide those photons primarily through LEDs.

Lighting electricity depends on several factors:

Fixture power × operating hours × number of fixtures

For example, 100 LED fixtures rated at 600 W operating 16 hours per day would consume:

100 × 0.6 kW × 16 hours = 960 kWh/day

Over 30 days:

960 × 30 = 28,800 kWh/month

This is why LED grow light energy cost can quickly become a major operating expense.

However, simply reducing light intensity is not necessarily an effective energy strategy. Less light can reduce electricity consumption but may also slow plant growth or reduce biomass.

The more meaningful goal is producing more marketable crop per kilowatt-hour of lighting.

Important variables include:

• LED photon efficacy;
• PPFD;
• photoperiod;
• daily light integral;
• fixture height;
• light distribution;
• plant spacing;
• crop architecture;
• cultivar;
• CO? concentration; and
• temperature.

Research published in 2026 continues to show that lighting strategy can materially affect energy efficiency in lettuce production.

A poorly designed lighting system does not just waste electricity at the fixture. Nearly all electrical energy entering the room eventually becomes heat, which must then be handled by the climate-control system.

That creates a direct relationship between lighting design and HVAC demand.

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Optimizing light use is critical to balancing plant productivity with energy efficiency.

HVAC and Dehumidification: The Second Major Energy Challenge

Plants continuously move water from their roots through their leaves into the surrounding air through transpiration.

In a sealed indoor farm, that moisture does not simply disappear.

It must be removed.

This is why cooling and particularly dehumidification can represent a significant portion of indoor farming energy consumption.

HVAC systems may need to control:

• air temperature;
• relative humidity;
• vapour pressure deficit;
• sensible heat from lighting;
• latent heat from crop transpiration;
• heat from pumps and equipment;
• fresh-air exchange; and
• heat entering through the building envelope.

In one measured lettuce system, HVAC accounted for approximately 40.4% of electricity consumption. In another modelling study, dehumidification alone represented approximately 19%.

The amount varies considerably with system design.

A facility in a hot and humid region faces different loads from one operating through a cold Canadian winter. Similarly, a highly insulated purpose-built facility will behave differently from a converted warehouse.

This is one reason energy modelling should be site-specific.

It is also why purchasing efficient LEDs without considering HVAC does not automatically create an energy-efficient farm.

Lighting and climate control have to be designed as one system.

Pumps and Irrigation Electricity

Compared with lighting and climate control, irrigation pumps are often relatively small electricity consumers.

But they should not be ignored.

Depending on the production system, electricity may be required for:

• main circulation pumps;
• irrigation pumps;
• return pumps;
• aeration pumps;
• dosing pumps;
• drain pumps; and
• backup pumping systems.

The electrical demand depends strongly on the production method.

A deep-water culture system running continuous aeration and circulation will have a different profile from NFT, aeroponics or intermittent drip irrigation.

Pump efficiency also matters.

An oversized pump that is throttled continuously can consume considerably more electricity than a properly sized pump operating near its efficient range.

Operators should therefore monitor not just whether water reaches the crop, but also:

kWh of pumping electricity per kilogram of marketable product.

Fertigation and Water Treatment

Fertigation usually uses less electricity than lighting or HVAC, but water management can still add several electrical loads, including dosing pumps, pH and EC controls, filtration, reverse osmosis, oxygenation, chilling, sterilization and nutrient recirculation.

Water quality and system design matter. Reverse osmosis and continuous recirculation can increase pumping and treatment demand.

The key question is not just how much electricity the fertigation pump uses, but how much electricity the entire water and nutrient-delivery system requires per kilogram of saleable crop.

Controls, Sensors and Automation

Modern indoor farms may contain hundreds or thousands of sensors and controlled devices.

Common systems monitor:

• temperature;
• relative humidity;
• CO?;
• light;
• pH;
• EC;
• dissolved oxygen;
• water temperature;
• tank levels;
• flow rates;
• pressure;
• equipment status; and
• crop conditions.

The sensors themselves normally consume relatively little electricity.

However, the systems they control can determine how efficiently much larger equipment operates.

Smart controls can reduce unnecessary:

• lighting hours;
• cooling;
• heating;
• pumping;
• ventilation;
• dehumidification; and
• irrigation.

A relatively small control load can therefore influence a much larger energy bill.

In one vertical hydroponic experiment, controls and monitoring represented only about 1.84% of electricity consumption, compared with much larger loads from lighting and temperature control.

The value of good controls is therefore less about their own energy consumption and more about preventing the rest of the facility from wasting electricity.

Do Not Forget Ancillary Electrical Loads

One common energy-accounting mistake is measuring the grow room while ignoring the rest of the facility.

A commercial indoor farm may also use electricity for:

• cold storage;
• packaging equipment;
• conveyors;
• elevators;
• compressed air;
• sanitation equipment;
• water heating;
• offices;
• computers;
• security systems;
• emergency equipment; and
• warehouse lighting.

These loads may not directly grow the crop, but they still appear on the electricity bill.

This creates an important distinction between:

Production-system electricity consumption

and

Whole-facility electricity consumption

Whole-facility consumption is especially important for financial modelling.

Agronomic benchmarking, however, may benefit from tracking both numbers.

For example:

Grow-system SEC = grow-room electricity ÷ kg harvested

Facility SEC = total electricity bill consumption ÷ kg sold

Tracking both helps identify whether efficiency problems are occurring inside the cultivation system or elsewhere in the operation.

Vertical Farming Electricity Cost: Lettuce Example at Different Power Prices

The relationship between energy consumption and cost is straightforward:

Electricity cost per kg = kWh/kg × electricity price per kWh

Consider three hypothetical lettuce farms:

These numbers represent electricity only. They do not include labour, seed, nutrients, packaging, rent, depreciation, maintenance or other production costs.

Now consider a farm operating at 12 kWh/kg and producing lettuce heads averaging 150 g.

Each head effectively carries:

12 kWh/kg × 0.15 kg = 1.8 kWh/head

At different electricity prices:

• $0.08/kWh ? approximately $0.14/head
• $0.15/kWh ? approximately $0.27/head
• $0.25/kWh ? approximately $0.45/head

The impact becomes even clearer at commercial scale.

A farm producing 10,000 kg of lettuce per month at 12 kWh/kg consumes:

10,000 × 12 = 120,000 kWh/month

Its electricity commodity cost would therefore be approximately:

• $9,600/month at $0.08/kWh;
• $18,000/month at $0.15/kWh; or
• $30,000/month at $0.25/kWh.

The difference between the lowest and highest electricity-price scenarios is more than $240,000 per year for the same production volume and electricity efficiency.

Actual commercial bills may also include demand charges, transmission, distribution, fixed charges and time-of-use pricing, so multiplying kWh by the advertised energy rate should be considered a first estimate rather than a final utility-cost model.

This is why vertical farming electricity cost should be evaluated before a facility is built, not after operations begin.

How Can a Vertical Farm Reduce Electricity Consumption?

Energy efficiency should not mean minimizing electricity at any cost.

If electricity consumption drops 15% but crop yield drops 25%, the farm has actually become less energy efficient per kilogram of product.

The better objective is:

maximize saleable crop output per unit of electricity.

Operators can improve performance by focusing on several areas.

Improve lighting efficiency.
Use high-efficacy fixtures, appropriate PPFD and photoperiods, good canopy uniformity and crop-specific lighting recipes.

Increase crop yield per growing area.
A facility consuming the same electricity while harvesting more marketable biomass automatically reduces its kWh/kg.

Optimize HVAC and dehumidification together.
Temperature and humidity management should be engineered around crop transpiration and lighting loads rather than sized independently.

Reduce unnecessary equipment runtime.
Pumps, fans and other devices do not always need to operate continuously.

Use variable-speed equipment where appropriate.
Variable-frequency drives and modulating equipment can reduce electricity consumption during partial-load conditions.

Monitor individual electrical loads.
Submetering lighting, HVAC, pumps and other systems makes it possible to identify where electricity is actually being used.

Track energy against production.
A monthly electricity bill alone does not indicate whether a farm is becoming more efficient.

Better KPIs include:

• total kWh;
• kWh/m² of growing area;
• kWh/kg harvested;
• kWh/kg sold;
• lighting kWh/kg;
• HVAC kWh/kg; and
• electricity cost/kg.

Recent modelling illustrates how strongly productivity and equipment performance can change the result. A 2026 vertical-farming economics study modelled lettuce electricity intensity ranging from approximately 7.83 down to 2.31 kWh/kg across different technology and crop-performance scenarios, with lighting remaining the largest energy component.

The biggest opportunity is therefore not simply finding cheaper electricity.

It is designing a farm that converts electricity into marketable biomass efficiently.

Making Every Kilowatt Count

Vertical farming electricity is a major operating consideration for facilities producing crops year-round under highly controlled conditions.

The central question should therefore not simply be “How much electricity does a vertical farm use?”

A better question is:

“How much marketable crop are we producing from every kilowatt-hour we purchase?”

For operators, developers and investors, that distinction is critical. A facility with efficient LEDs but poor crop yields may still have high electricity consumption per kilogram. Likewise, a sophisticated climate system may justify its energy use if it increases yield, shortens crop cycles and reduces losses.

Ultimately, the strongest indoor-farming energy strategy combines efficient equipment, crop performance, intelligent controls and electricity pricing into one operating model.

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