# YESS Power

YESS Power means Your Energy Storage Solution and is a brand of Topkapı Endüstri A.Ş.
Topkapı Endüstri has worked in engineering and energy since 1985, with more than 40 years of experience building, operating and maintaining power plants.
Target markets: Türkiye, Romania, Serbia, North Macedonia and the Western Balkans.
Production facility: Yalova OSB.

## Verified project
FEC Novaci Solar + BESS, Novaci, North Macedonia.
Investor: MEY Energy. Technology partner: Cubenergy.
BESS: 30 MW / 60 MWh. Solar plant: 55 MWp.
Delivered by YESS Power in February 2026 and in operation.
YESS scope: system integration, engineering, procurement, installation, commissioning, service and maintenance, turnkey.
https://www.yesspower.com/en/projects/novaci/

## Offer
PowerCombo E5 is the featured 5 MWh battery energy storage container (AC Block), with integrated PCS. It is not a separate product from the 5 MWh container.
PowerCombo 3 MWh is the 3,086 kWh battery energy storage container.
Transformer Station is an MV step-up transformer container up to 35 kV for PowerCombo BESS.

PowerCombo E5
Energy: 5,015 kWh
Rated AC power, 2 h: 2,580 kW
Maximum AC power, 2 h: 2,838 kW
Rated AC power, 4 h: 1,500 kW
Maximum AC power, 4 h: 1,650 kW
Battery chemistry: LFP
Cell: 3.2 V / 314 Ah
Cycle life at 70% retention (0.5C, 25 °C): 8,000
Battery strings: 12
DC voltage range: 1,164.8 … 1,476.8 V
Rated AC voltage: 690 V
Grid voltage range, adjustable: 586.5 … 759 V
Frequency: 50/60 Hz
Power factor: -1 … +1
THDi: < 3%
Integrated PCS: AC Block
Cooling: Liquid cooling for battery packs and PCS
Fire suppression: PFAS-free aerosol extinguishing agent
Fire control panel: Listed
Fire sprinkler: Pre-installed
Protection: IP54
Operating temperature: -30 … 50 °C
Relative humidity, non-condensing: 0 … 95%
Altitude without derating: 2,000 m
Dimensions, 20 ft: 6,058 x 2,438 x 2,896 mm
Maximum weight: 44 t
Communication: Ethernet, Modbus TCP/IP
Grid-forming capability: Virtual synchronous generator control for grid support and islanded operation
Certifications: UL1973, UL9540A, UL9540, IEC 62619, CE, UN38.3
Compliance: IEC 62933, NFPA 855

PowerCombo 3 MWh
Energy: 3,086 kWh
Rated AC power: 1,600 kW
Maximum AC power: 1,760 kW
Battery chemistry: LFP
Cell: 3.2 V / 314 Ah
Cycle life at 70% retention (0.5C, 25 °C): 8,000
Battery strings: 8
Integrated PCS: Yes
Rated AC voltage: 690 V
Cooling: Liquid cooling
Dehumidification: Yes
Fire suppression: FK-5-1-12
Protection: IP54
Operating temperature: -30 … 50 °C
Altitude without derating: 2,000 m
Dimensions, 20 ft: 6,058 x 2,438 x 2,896 mm
Maximum weight: 31 t
Communication: RS485, Ethernet
Certifications: UL1973, UL9540A, UL9540, IEC 62619, CE, UN38.3

Transformer Station
Ratings at 40 °C: 3,300 kVA / 6,600 kVA
Input, 3-phase: 690 V
Output voltage: 10 … 35 kV
Frequency: 50/60 Hz
Transformer: Oil-immersed
Cooling: ONAN
Insulating fluid: Mineral oil, PCB free
Efficiency: Tier 2 (EN 50588-1)
MV circuit breaker: Vacuum
MV protection: Relay protection
LV surge protection: I+II
UPS: 1 kVA / 30 min
MV and LV room protection: IP54
Corrosion class: C5-M
Operating temperature: -30 … 40 °C
Dimensions, 20 ft: 6,058 x 2,438 x 2,896 mm
MV and LV connections: Prewired and pretested
Communication: Modbus TCP/IP
Standards: IEC 62271-202, IEC 62271-200, IEC 60076, IEC 61439-1, EN 50588-1
Values are nominal and may vary by project configuration. Final values are confirmed in the project offer.
Technology partner: Cubenergy. YESS-branded datasheets are available as public PDF downloads from the product page. Request an offer through the contact form. No warranty duration or price is stated.
/downloads/YESS-PowerCombo-E5-Datasheet.pdf
/downloads/YESS-PowerCombo-3MWh-Datasheet.pdf
/downloads/YESS-Transformer-Station-Datasheet.pdf
https://www.yesspower.com/en/products/energy-storage-container/
Main applications: Hybrid BESS integrated with solar and wind power plants; Standalone BESS as a stand-alone grid-connected energy storage facility. Also offered: commercial and industrial BESS including microgrids; EMS; transformer containers up to 35 kV; MV connections or transmission connections with an MV/HV substation.
Turnkey EPC plus service and maintenance. Remote monitoring and remote technical support available 24/7. Planned maintenance and on-site intervention are planned per project.
Not offered: residential batteries, project financing, standalone solar EPC, local field service teams, service partners or spare-parts stock in target countries.

## Contact
Topkapı Mah. Turgut Özal Millet Cad. No:180-182, 34093 Fatih / İstanbul
+90 212 534 04 10
info@yesspower.com
Technical support 24/7.
https://www.instagram.com/yess.power
https://www.linkedin.com/showcase/yesspower
https://www.youtube.com/@TopkapEndustriIstanbul
https://www.facebook.com/TopkapiEndustri

## Sources
- [YESS Power | Hybrid and Standalone BESS](https://www.yesspower.com/en/): Hybrid BESS for solar and wind, Standalone BESS and industrial storage. YESS Power delivers turnkey EPC, EMS and remote technical support.
- [Hybrid and Standalone BESS Solutions | YESS Power](https://www.yesspower.com/en/solutions/): Explore Hybrid BESS for solar and wind plants, Standalone BESS for grid-connected storage, C&I systems, EMS and microgrids.
- [Our Energy Storage Approach | YESS Power](https://www.yesspower.com/en/approach/): Understand how YESS Power moves from an operating need to an agreed energy storage project scope.
- [Contact YESS Power | Energy Project Consultation](https://www.yesspower.com/en/contact/): Tell YESS Power where your energy project stands and what you want storage to achieve.
- [About YESS Power and Topkapı Endüstri | Energy Expertise Since 1985](https://www.yesspower.com/en/about-us/): YESS Power is Topkapı Endüstri’s energy storage brand, building on power plant experience since 1985. Hybrid and Standalone BESS, turnkey EPC and remote technical support.
- [Service & Support | YESS Power](https://www.yesspower.com/en/service/): 24/7 remote technical support and remote monitoring, with maintenance planned for your project.
- [Energy Projects | YESS Power](https://www.yesspower.com/en/projects/): Review the application, configuration and integration responsibilities behind each project reference.
- [Simulation | YESS Power](https://www.yesspower.com/en/simulation/): Bring your site, generation and storage into one view. Explore how your inputs affect the estimates.
- [Energy Storage News & Projects | YESS Power](https://www.yesspower.com/en/blog/): Read YESS Power project announcements, technology partnership updates and reports from regional energy events.
- [The Future of Energy](https://www.yesspower.com/en/journal/): How does battery storage work, and what can it offer your business? Explore solar energy storage, peak shaving and energy management with YESS Journal.
- [PowerCombo E5 | 5 MWh battery storage | YESS Power](https://www.yesspower.com/en/products/energy-storage-container/): PowerCombo E5: 5 MWh battery energy storage container (AC Block), 5,015 kWh. 2 h / 4 h. PowerCombo 3 MWh: 3,086 kWh. Transformer Station: 35 kV.
- [FEC Novaci Solar and Battery Storage | YESS Power](https://www.yesspower.com/en/projects/novaci/): FEC Novaci Solar + BESS in North Macedonia: 30 MW / 60 MWh battery storage at a 55 MWp solar plant, delivered by YESS Power in February 2026 and in operation.

## Technical scope
YESS-branded product datasheets are available as PDF downloads from the product page. Performance, service and warranty commitments require a verified project scope.
Event participation does not establish a contract or completed project.

## Languages
- https://www.yesspower.com/en/
- https://www.yesspower.com/tr/
- https://www.yesspower.com/mk/
- https://www.yesspower.com/ro/
- https://www.yesspower.com/el/
- https://www.yesspower.com/zh/