Rompetrol is planning to install solar generation and battery storage at its Vega refinery in Ploieşti. The initiative is positioned as a different approach to energy-transition investment compared with utility-scale renewable projects that dominate Southeast European headlines. The electricity from the installation is intended primarily for on-site consumption.
Solar and battery specifications for on-site use
The project combines approximately 4.8 MW of solar capacity with around 9 MWh of battery storage. Rompetrol’s plan targets an industrial consumption profile rather than a grid-fed configuration. The company estimates the solar plant could generate more than 6 GWh annually.
In this setup, the battery’s location is central to how the system operates. A refinery has significant and relatively predictable electricity demand, which can be partially offset by solar output during daylight hours. The battery then supports continued operations when solar generation declines.
How behind-the-meter storage changes the commercial model
Many storage developments across Southeast Europe are being built either as grid assets or alongside utility-scale renewable plants. Rompetrol’s approach applies the technology directly to an industrial load profile at the refinery site. This arrangement results in a different commercial structure for the electricity produced and stored.
The company says the value of self-generated electricity for industrial users is not limited to wholesale power prices. It points to potential savings from avoided network charges, taxes, imbalance costs and peak consumption charges as elements that can improve the business case. Storage can also reduce maximum demand and support resilience during short grid disturbances.
Implications for industrial flexibility across Southeast Europe
The project is relevant beyond refining because similar electricity challenges affect other industries across Southeast Europe. Steel mills, mines, cement plants, food processors, logistics centres and data centres face volatile electricity prices, increasing decarbonisation requirements and pressure to reduce indirect emissions. Behind-the-meter solar plus storage is presented as a way to address these factors together.
The model is described as most effective where industrial demand overlaps partly with solar production. In that case, batteries can bridge differences between generation and load through shifting energy across time. Industrial batteries are also described as not needing to rely exclusively on merchant arbitrage to be viable.
Potential revenue sources mentioned include avoided energy costs, lower demand charges, backup capability and participation in demand-response or balancing programmes. Romania’s new demand-flexibility mechanisms may eventually reinforce this business case.
BESS shift from grid infrastructure to industrial sites
The Rompetrol project is framed as part of an evolution in the regional storage market. It indicates a move for BESS from dedicated grid infrastructure toward industrial energy management. That shift could expand deployment beyond substations and solar parks into factories, mines, refineries and industrial estates.
The source also notes that thousands of industrial consumers across Southeast Europe could potentially install smaller systems rather than waiting for utilities to deliver flexibility at system level.
