Five ways we’re working towards 100% renewable energy by 2030

We want to support renewable energy generation in the areas in which we operate and so where we can, we source renewable electricity from local markets. This takes the form of contracts called power purchase agreements (PPAs) and green electricity tariffs. “We favour suppliers with solid strategies to increase their renewable electricity supply base and recently built assets, such as wind farms, that are directly increasing local capacity,” explains Andrea Rickert-Pulvermann, who leads our renewable electricity approach.

Where we can’t do this, we buy openly traded certificates linked to renewable electricity generation called renewable energy certificates (RECs), to match our grid power demand.

To improve and secure access to renewable electricity, we are also generating some of our own supplies on-site.

We have added capacity from solar installations through third-party suppliers and our own investments at over 40 locations in 18 countries, such as at the pictured site in South Africa. Many installations cover 10–30% of a site’s annual electricity demand.

This makes business sense. In India, for example, we estimate that solar installations at six of our factories across four different states will generate savings in the region of €4.9 million over 15 years.

And there are plans for battery storage devices too, allowing us to expand our installations, store electricity during the day and use it at night in our manufacturing.

We need heat to produce most of our products, to cool them before packing. An example here would be ice cream. Until now, this low-grade heat has been released via cooling towers because it is of no use in other manufacturing processes.

This is changing, thanks to our group engineer for thermal energy, Vivek Nesarikar. He and his team have been piloting the use of heat pumps which capture low-temperature, low-grade heat and increase it to 65–80⁰C, which is the normal operating temperature for most of our factory processes.

This means heat that used to be wasted can be used again and again. “It is a clean technology solution in the truest sense,” says Vivek. In Unilever Hindustan, utility executive Kothiya Jaydeep (pictured) and his team are using heat pumps to heat water, thus eliminating diesel use in hot water generators. And in our ice cream factories, such as our site in Cikarang in Indonesia, heat pumps can potentially offset heat requirements and reduce CO₂ emissions by up to 70%.

While it’s our priority to replace the natural gas boilers in our factories with low-carbon technologies such as heat pumps, biofuels from biological materials such as agricultural waste and organic municipal waste can also help supply our thermal energy. But our aim is to limit their use and ensure the biofuels we use don’t lead to further deforestation and provide clear greenhouse gas savings across the entire lifecycle.

We have defined a set of principles (PDF 110.51 KB) that see us use biofuels sustainably. Unilever primarily uses them as a transition fuel for thermal energy. In exceptional cases, we may use biofuels in combined heat and power (CHP) plants where electricity grid supplies are not stable, or their carbon intensity is lower than that of the local grid.

We are also working to source local supplies, not use materials if they can be put to a more circular use and ensure our use of biofuels will not distort local food prices. In Sri Lanka where tea is one of the country’s most popular beverages, we put spent tea leaves to good use as biomass, powering our factories in Horana and Agarapathana.

Accelerating the world’s transition to clean energy cannot be achieved in silo. For Unilever, this means making choices that activate broader changes.

We’re asking our suppliers to help us decarbonise our shared value chain, and providing tools and resources to those with the biggest climate impact to help them measure and reduce their emissions.

Our engagement with utilities in the US to demand renewable energy supplies resulted in one of the most coal-reliant of energy providers developing its Renewable Solution Program. This helped to bring clean energy to Missouri.

And we’re keeping up pressure on governments. As one of the first members of RE100, we’re helping to signal demand for renewable electricity globally. And as a principal partner at the COP26 global climate conference, we signed up to US State Department’s Clean Energy Demand Initiative, to encourage countries to support corporate renewable procurement.