Energy storage system integrators
Energy storage
with its own brain.
We integrate LFP cells, power electronics, protection and our EMS to deliver 100% operational BESS. From 100 kWh to 188 MWh.
BK BESS · Powerbolt 5.015 MWh
- Charge
- 13:00–15:00
- Discharge
- 20:00–22:00
- Capturable spread
- €232/MWh
2-hour battery, one cycle a day. This is how BK EMS decides when to charge and when to sell.
- +20
- years in the energy sector
- +50
- professionals
- +1000
- PV, BESS and hybridisation projects
- 188 MWh
- the largest system delivered
Solutions
If you need stored energy, we deliver it.
Cutting your bill, selling solar energy in the high-price hours, never suffering another micro-outage or running without the grid. Each case calls for a different system.
Industry and C&I
Power peaks, excess charges and a bill that keeps rising.
Peak shaving, P1–P6 arbitrage and lower contracted power.
PV + BESS hybridisation
Captured prices at zero in solar hours, and curtailed energy.
Shift production to the high-price hours without losing your remuneration (RD 917/2025).
Uninterrupted backup (STS)
Outages and micro-outages that stop production lines, servers or processes.
Static switching in milliseconds: the critical load never notices.
Off-grid systems
No grid or a weak grid: farms, pumping stations, construction sites, remote installations.
PV + BESS microgrid in island mode that replaces or supports the diesel generator.
E-mobility
Ultra-fast charging that requires a bigger grid connection.
The battery covers the DC chargers' peaks; the grid only sees the average.
Utility-scale energy storage
Record price volatility and a grid that demands flexibility.
MWh-scale standalone BESS for arbitrage, balancing services and capacity.
BK integration
From cell to container.
All integrated by us.
Production
Two production centres. Engineering and service in Spain.
We have two production centres in China, in Luoyang and Lianyungang, where we integrate and test every system before shipping it. Our head office and showroom are in Oviedo (ASIPO III, Llanera), with a sales office in Madrid.
Integration and testing
Every unit leaves the plant tested and with its quality dossier.
Where we are
China · Spain
LuoyangLianyungangOviedoMadridCells checked
Voltage and impedance of every cell on receipt, and sorting into groups.
Laser welding and BMS
Laser-welded busbars and a BMU in every pack.
Multi-level testing
Pack, rack and system. FAT before leaving the plant.
Commissioning in Spain
Installation, commissioning and 24/7 operation with our EMS.
We are integrators: we bring together cells, BMS, power conversion, protection, cooling and EMS to deliver 100% operational BESS.
See productionA day in the life of a BK battery
24 hours of market in 10 seconds.
Real day-ahead market prices for 23 Sep 2026. 5 MW / 10 MWh battery operated by BK EMS.
00:00
Waiting
Early morning. The price is high and stable: the battery waits.
- Price now
- 205 €/MWh
- Charge
- 10 %
- Result
- 0 €
BK EMS
The battery is the muscle. The EMS decides.
Our software coordinates solar PV, grid, market and consumption every minute so that every stored kWh is worth as much as possible.
- Forecast
- Demand and generation with machine learning
- Arbitrage
- Charge cheap, discharge dear, in real time
- Grid
- Operator setpoints and power plant control (PPC)
- Integration
- IEC 61850, Modbus, OPC-UA and open API
Projects
Installed, connected and producing.
Utility BESS · Lianyungang, China
188MWh
Utility BESS · Luoyang, China
20MWh
Illustrative image
PV hybridisation · Ocaña, Toledo
5MWh
EV charging + BESS · Rivas-Vaciamadrid
2.7MWh
1,000+ projects
PV, BESS and hybridisation in Spain, Portugal and Latin America.
Services
From the first figures to operation, a single point of contact.
- 01
Feasibility
Techno-economic study, regulation, grid access and connection, financial model.
- 02
Engineering
Detailed engineering, permits and tender-ready documentation.
- 03
EPC construction
Turnkey: supply, civil and electrical works, commissioning.
- 04
Operation
24/7 O&M, predictive maintenance and optimisation with BK EMS.
Investors
Energy storage is the next great energy infrastructure. Grow with us.
We are opening the door to partners who want to accelerate BK's growth and co-invest in energy storage and hybridisation assets.
- Energy storage target for Spain by 2030 (PNIEC)
- 22.5 GW
- Team projects
- 1,000+
- Largest BESS delivered
- 188 MWh
- Years in the sector
- +20
Have an energy storage project?
Tell us what you need and our engineering team will propose the system, the budget and the delivery plan.