Battery containers & blocks
SKTESS5000 5 MWh containers and SKTESS10000-5000K 10 MWh / 5 MW integrated blocks with BMS and fire safety.
Solution
Grid-Scale Storage
Utility-scale battery energy storage from 5 MWh containers to 80 MW / 160 MWh plants for arbitrage, grid services and standalone BESS.
The challenge
Why grid-scale storage now
Volatile wholesale prices and rising renewable penetration make standalone, utility-scale BESS a core grid asset — but only if it is bankable, safe and delivered on time.
- Day-ahead and intraday price spreads reward storage that can charge low and discharge high at MW/MWh scale.
- Grids need fast frequency response, capacity and stability services as conventional generation retires.
- EPCs and developers need standardized, certified building blocks — not bespoke one-offs — to keep CAPEX and schedule predictable.
How it works
How a grid-scale plant is built
Standardized containers and integrated blocks combine into AC blocks and full plants, all under one EMS.
- 01
5 MWh container
The SKTESS5000 LFP container (314 Ah cells, liquid-cooled) is the standard energy building block.
- 02
10 MWh / 5 MW block
The SKTESS10000-5000K pairs 10 MWh with a 5 MW central PCS as a pre-integrated AC block.
- 03
Prefab inverter substation
SKTESS2500K / 5000K / 10000K prefabricated inverter substations add PCS plus medium-voltage step-up in one skid.
- 04
Plant & grid
Blocks scale to 20 MWh AC blocks and 80 MW / 160 MWh plants, coordinated by a plant-level EMS, with optional grid-forming control.
Outcomes
System specifications
80 MW / 160 MWh plant scale (modular)
314 Ah LFP cell, 8,000+ cycles
Grid-forming optional control mode
Product specifications are SAKETE SmartStore / Container series values. Project outcomes such as payback, self-consumption and demand-charge reduction depend on your site load profile, tariff and system sizing, and are confirmed in the project quote.
SAKETE scope
What SAKETE supplies
Central PCS & step-up
Prefabricated inverter substations (SKTESS2500K / 5000K / 10000K class) with central PCS and medium-voltage step-up.
Turnkey EPC scope
Plant-level EMS, SLD and layout design, grid-code compliance (EN 50549 / VDE-AR-N 4105 / G99 / IEC 62116), commissioning and after-sales.
Project references
Deployed on real European C&I sites
Representative SAKETE storage projects in this application.
Bulgaria — Next Generation EU (RESTORE) 1.1 GWh awarded
Standalone BESS · 11% of the RESTORE programme
Portfolio including Pleven 600 MWh & 200 MWh, Stara Zagora 200 MWh, Kameno 50 MWh, Silistra 40 MWh and Balchik 20 MWh — delivering grid stability and flexibility for the EU energy transition.
Europe 5 MW / 10 MWh
Containerised · 5 MW central PCS
Storage added to a 10 MWp PV plant — charge at low prices, discharge to sell at peak prices.
Europe 2.5 MW / 5 MWh
Containerised · 2.5 MW central PCS
Storage added to a 10 MWp PV plant for price arbitrage on an existing grid connection.
FAQ
Frequently asked
How large can a SAKETE grid-scale plant be?
Plants are modular: a single 5 MWh container scales through 10 MWh / 5 MW blocks and 20 MWh AC blocks up to 80 MW / 160 MWh and beyond, all under one plant EMS.
Is the PCS and step-up transformer included?
Yes. Utility-scale delivery is turnkey: central PCS and medium-voltage step-up are provided as prefabricated inverter substations (SKTESS2500K / 5000K / 10000K class).
Can SAKETE deliver at grid scale today?
Yes. SAKETE was awarded 1.1 GWh of standalone BESS in Bulgaria’s Next Generation EU RESTORE programme, alongside containerized 5 MW / 10 MWh deployments in Europe.
Does it support grid-forming and which grid codes apply?
Grid-forming control is available as an option. PCS options are grid-code compliant for European connection (EN 50549, VDE-AR-N 4105, G99, IEC 62116 anti-islanding), confirmed per project and country.
Request a project-specific quote
Share your site profile and SAKETE returns a tailored quote from European stock — typically within 1–2 business days.