Isalnita BESS · Dolj County, Romania

Battery storage for Oltenia's energy transition

Oltenia Tech Investment Solution SRL is developing IS Ișalnița, a 147 MW / 610 MWh standalone battery energy storage system that stores surplus renewable power and returns it to the grid when demand peaks.

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Rows of blue battery containers labelled TOKI - IS Isalnita beside a substation, with the Isalnita power plant cooling towers behind — AI-generated visualisation of the planned facility, not a photograph.

147 MWInstalled power

610 MWhStorage capacity

~4 hDuration at full power

23,600 m²Site, owned

Q3 2027Target COD

The project

IS Ișalnița standalone BESS

A grid-connected battery with no generation on site. It charges when solar output pushes prices down and discharges into the morning and evening peaks.

Company: OLTENIA TECH INVESTMENT SOLUTION S.R.L.
Facility: IS Ișalnița battery energy storage system
Location: Ișalnița, Dolj County, Romania
Capacity: 147 MW / 610 MWh, built in a single stage
Throughput: About 304 GWh a year (1.5 cycles a day)
Land: 23,600 m² owned; rezoning to construction land in progress
Permit: ANRE establishment authorisation, September 2026
Support: Participant in Romania's support programme for standalone BESS

How a day of operation looks

Illustrative only: shape of a typical day, not a price forecast or dispatch plan.

Charging (buys power) Discharging (sells power) Price

Timeline

From authorisation to operation in about a year

Sep 2026
ANRE establishment authorisation granted
Nov 2026
Project reaches Ready-to-Build status
Q4 26 – Q3 27
Construction and commissioning
Q3 2027
Full commercial operation: 147 MW / 610 MWh

Dates after September 2026 are targets. Solid lines mark firm or near-term milestones; dashed lines mark planned stages.

Documents

Procedura de achizitie

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Caiet de sarcini BESS Isalnita OTIS

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SF - BESS Isalnita cu anexe

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Plan amplasament teren OTIS

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Extras CF teren OTIS

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Anunt de participare BESS Isalnita OTIS

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Model Contract BESS Isalnita OTIS

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Company

About OTIS

Oltenia Tech Investment Solution SRL (OTIS) is the Romanian project company that owns and develops the Ișalnița battery storage facility.

OTIS is part of the group of Ker Toki Power Romania, an ANRE-licensed electricity supplier, aggregator, optimiser and trader. Its parent, Toki Power Holding GmbH in Vienna, belongs to Renalfa SolarPro Group, which works with more than 2,000 independent power producers and 4,000 SMEs across Romania, Bulgaria, Hungary and North Macedonia.

Ișalnița is the group's first greenfield investment in Romania and the first step in a plan for up to 1,200 MWh of its own storage in the country.

Renalfa SolarPro GroupRenewables and e-mobility group, South-East Europe

Toki Power Holding GmbHHolding company, Vienna, Austria

Ker Toki Power RomaniaSupply, aggregation, optimisation and trading

Oltenia Tech Investment Solution SRLProject company · IS Ișalnița BESS

Why storage

More solar and less coal mean the grid needs flexibility

Solar output lowers midday prices across Central and Eastern Europe, while evening demand stays high. Batteries move that energy to the hours it is needed.

42.5%

EU renewable share targeted for 2030, up from 24.1% in 2023

50%

of active EU coal plants expected to close by 2030

conservative annual growth for European battery storage, to about $65bn by 2031

Energy time-shifting

Day-ahead and intraday trading on OPCOM: charge in low-price hours, discharge into the peaks.

Grid balancing

Fast frequency and reserve services for the transmission system operator.

Coupled markets

European day-ahead and intraday market coupling connects the plant to wider regional liquidity.

Sources: Renalfa / Toki market overview; European Environment Agency. Operations are managed in-house by Ker Toki Power Romania.

Announcements

Project news

Updates on permits, construction and operation of the Ișalnița battery storage facility.

Contact

Talk to the project team

For financing, partnership, grid or local enquiries about the Ișalnița project.

Company: OLTENIA TECH INVESTMENT SOLUTION S.R.L.
Registered office: Strada Pipera nr. 46D-46E-48, Oregon Park, Etaj 4, Sector 2, București, Romania
Trade Register: J2023008715237
EUID: ROONRC.J2023008715237
CUI: 49341590
Email: otis@toki.energy