GÜRİŞ Brings a 200 MWh Battery Online in Romania. What a Turkish Energy Group Sees in Romanian Storage

In a marshy field outside the village of Iaz, in Romania’s Caraș-Severin County, a Turkish group has just finished the largest standalone battery in the Banat region. Energy Capital Group, part of GÜRİŞ Holding, completed its roughly 100 MW / 200 MWh battery energy storage system with Romanian EPC Simtel in May 2026, after an eight-month build. It is now one of the three largest batteries in the country.

The asset in numbers

• Power and energy: 98.6 MW and 196.4 MWh under the EPC contract, a two-hour system. Romania Insider, using Transelectrica data, lists the site at 206 MWh, which likely reflects installed rather than contracted capacity.
• Hardware: 44 lithium-ion battery containers, 528 high-power inverters, 11 transformer stations, a dedicated 110 kV substation and an energy management system.
• EPC contract: 168.9 million lei excluding VAT (about US$39 million), signed with Simtel in July 2025.
• Public support: more than 50 million lei (about €10.7 million) in capex grant from Romania’s Recovery and Resilience Plan storage scheme.
• Build time: eight months, on wet ground that first had to be stabilised to carry heavy industrial loads.

Who owns it

The project company is Energy Capital Group, owned by MOGAN Bucharest, which belongs to Turkey’s GÜRİŞ Group, best known for construction and energy projects at home and abroad. Mogan Europe BV, a GÜRİŞ affiliate, and Lara Business Energy are also named as partners.

“Romania has major potential in this sector.” Kaan Yamantürk, CEO, Energy Capital Group

“Implementing a project of this size within eight months confirms the maturity of the Simtel Team.” Mihai Tudor, CEO, Simtel Group

How a battery like this makes money

Neither GÜRİŞ nor Simtel has published the revenue model. What the companies have said is that the system is built to take part in the balancing market, helping to keep grid frequency and voltage stable. For a two-hour, transmission-connected battery in Romania, the usual revenue stack combines three layers:

• Balancing services: frequency restoration reserves (aFRR and mFRR) contracted by Transelectrica, which have been the most lucrative stream for early Romanian batteries.
• Energy arbitrage: charging on cheap midday solar and selling into the evening peak. Romania now has more than 4,000 MW of dispatchable solar, which widens that daily spread.
• Capacity value: a two-hour duration gives flexibility to shift between markets as balancing prices fall with more batteries online.

Why a Turkish group is betting on Romanian storage

Romania’s storage market is moving fast. By the end of August 2026 the country had 1,094 MW and 2,310 MWh of batteries connected, with 335 MWh added in August alone. For Turkish groups with construction and energy experience, storage offers three things wind and solar no longer do as easily in Romania: short build times, smaller land needs and grid connections that are easier to obtain in the right nodes.

Iaz shows the model working: a Turkish owner, a Romanian EPC, EU co-funding and a build of under a year.

Momentum Energy’s View

GÜRİŞ has turned a grant-backed project into one of Romania’s largest operating batteries in less than a year. For storage investors, three points stand out:

• Local EPC capacity is real. Simtel’s delivery on difficult ground shows Romanian contractors can now execute utility-scale BESS without relying solely on foreign integrators.
• Balancing revenues will compress. With over 2 GWh online and more coming, first movers like Iaz capture the best prices. Later entrants should model a revenue stack that leans more on arbitrage.
• Turkish capital has a template. Iaz is a repeatable structure for Turkish groups entering Romania: a Dutch holding, a Romanian project company, a local EPC and EU support.

Sources and references

Organisations and documents cited in this article.

1. Transelectrica (transmission system operator)