High Electricity Prices Should Work in Farmers’ Favour
arrow_backTo the overview21 October 2026 | GreenFarm
Electricity prices can vary significantly, but farmers cannot simply move their daily tasks to the hours when electricity is cheaper. With a GreenFarm on-farm biogas plant and the new FlexControl control system, it becomes possible to adapt electricity production to electricity prices. Instead of generating electricity continuously throughout the day, the plant can generate more electricity when prices are high and the electricity is therefore more valuable.
FlexControl automatically controls plant operation based on electricity prices and the farm’s own electricity consumption. This makes it possible to make better use of the energy produced and potentially sell surplus electricity when prices are favourable.
“For farmers, it is about getting the most out of the resources already available on the farm. Producing your own energy and making the most of it should be simple. With FlexControl, we make it easier to adapt electricity production to electricity prices and the farm’s needs, giving farmers better opportunities to make their own energy production financially viable,” says Frank Wennerberg, Director of GreenFarm.
Biogas is produced continuously in the plant’s process tank and stored beneath a double membrane until it is used in the engines to generate electricity and heat. The gas storage acts as a buffer, making it possible to shift electricity production to the times when electricity is most valuable.
FlexControl automatically retrieves electricity prices for the next day and takes relevant grid tariffs into account. The system plans plant operation based on this information. During periods of high electricity consumption on the farm, such as milking or feed mixing, FlexControl can also reduce the plant’s own electricity consumption, for example by reducing mixing activity. This frees up capacity in the farm’s electricity supply, allowing a greater share of the electricity to be used on the farm when demand is highest.
When electricity prices are low, the engines can run at reduced capacity or be switched off while the biogas accumulates in storage. When prices rise, more engines can run simultaneously, using the stored biogas to generate electricity when it is more valuable.
FlexControl also gradually adjusts the amount of feedstock supplied to the plant according to the level of gas in storage. This helps maintain a balance between biogas production and the engines’ capacity, reducing the need to flare excess biogas.
FlexControl is supplied with new GreenFarm plants and can also be installed on existing plants with compatible hardware.
The control system has been awarded two stars at Agromek Stars 2026 and will be presented at GreenFarm’s stand K8224 at Agromek.
The first plant equipped with FlexControl is currently being built at Lundegaard Avl og Opformering in Sæby, Denmark. Everyone interested is invited to an Open House at the Farm Biogas Plant on Thursday, 19 November 2026. Find the event on Facebook or LinkedIn.
This article is written by:
GreenFarm
Our concept reduces greenhouse gases from agriculture by utilizing waste products from agricultural production and converting them locally on the farm. This enables each farm to become partially self-sufficient with energy.
The biogas process leaves a by-product, which is also useful in agriculture – a fertilizer that can be used for crop cultivation.
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