Rompetrol plans to install solar generation and battery storage at its Vega refinery in Ploieşti. The initiative is positioned as a different type of energy-transition investment compared with utility-scale renewable projects that dominate Southeast European headlines. The electricity from the system is intended primarily for on-site use.
The project combines approximately 4.8 MW of solar capacity with around 9 MWh of battery storage. Rompetrol’s approach places the battery behind the refinery fence, linking storage operation to an industrial consumption profile rather than to grid-level deployment. The company estimates the solar plant could generate more than 6 GWh annually.
Battery placement tied to refinery load profile
The significance of the project is described as being driven by where the battery is located. In much of Southeast Europe, storage developments are typically structured as grid assets or built alongside utility-scale renewable plants. Rompetrol applies similar technology directly to a refinery’s electricity demand.
A refinery’s power use is characterised as significant and relatively predictable. Solar generation can reduce electricity purchases during daylight hours, while the battery can shift part of that generation into periods when the refinery continues operating but solar output declines. This configuration is intended to align generation timing with industrial load needs.
Commercial drivers for behind-the-meter solar plus storage
The company says the economics for industrial users can be attractive because the value of self-generated electricity is not limited to the wholesale power price. It points to potential benefits from avoided network charges, taxes, imbalance costs and peak consumption charges. These factors are presented as contributors to the business case for on-site generation paired with storage.
Storage is also described as capable of reducing maximum demand and improving resilience during short grid disturbances. The project is therefore framed as relevant beyond refining operations due to its applicability to other industrial sites with similar electricity procurement and reliability considerations.
Demand flexibility and potential regional replication
Steel mills, mines, cement plants, food processors, logistics centres and data centres across Southeast Europe face common pressures related to volatile electricity prices, increasing decarbonisation requirements and efforts to reduce indirect emissions. Behind-the-meter solar plus storage is cited as a way to address these challenges in combination.
The model is described as most effective where industrial consumption overlaps partly with solar production, with BESS used to close the gap between generation and load. Industrial batteries are also said not to rely exclusively on merchant arbitrage for viability, with revenue potentially coming from avoided energy costs, lower demand charges, backup capability and participation in demand-response or balancing programmes.
Romania’s new demand-flexibility mechanisms may later reinforce this business case. The Rompetrol project is presented as an evolution in the regional storage market, reflecting a shift from dedicated grid infrastructure toward industrial energy management .
The same direction could extend beyond large installations at substations and utility-scale solar parks, with thousands of industrial consumers across Southeast Europe potentially installing smaller systems rather than waiting for utilities to deliver flexibility at system level . The next phase of battery deployment is therefore expected to occur inside factories, mines, refineries and industrial estates as well as in grid-adjacent locations.
