Market
What drives the energy storage business.
Regulation, prices and returns of batteries in Spain, explained by the team that designs, integrates and operates them.
Featured
Regulation · 5 min read
RD 917/2025: what changes for hybridising plants with batteries
The decree lets a renewable plant add energy storage without losing its regulated remuneration. We explain the changes, the dates and what is still pending.
BK Energies team · 24 September 2026
Hybridisation · 5 min read
Why hybridise a solar plant in 2026
Zero prices in sunny hours, curtailment and a capacity mechanism on the horizon. This is how a PV plant's numbers change when a 2-hour battery is added.
BK Energies team · 24 September 2026
Market · 5 min read
How a battery makes money in Spain
Arbitrage, balancing services and capacity for grid-connected batteries; contracted power, tariff periods and self-consumption for a company's batteries. The revenue streams, one by one.
BK Energies team · 24 September 2026
BK Storage Analytics
What a battery earns in Spain, every day.
OMIE prices, spreads, arbitrage revenue by battery duration and a 7-day forecast. Public data, updated daily.
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