Battery storage for business · Spain
250 kWh (125 kW) industrial battery storage in Spain: 2026 price
A 250 kWh / 125 kW battery storage system for a business costs €55,000–80,000 turnkey in Spain (€220–320 per kWh, excl. VAT, prices of 4 October 2026). At full power it runs for about 1.7 h, at half power about 3.4 h.
Free. A few questions, then a plan with sizes, prices and payback.
18:00Battery 100% · waiting
- Grid → building19 kW
Price and what it includes
- Turnkey price
- €55,000–80,000Excluding VAT
- Per kWh
- €220–320Battery, inverter and installation
- Backup
- 1.7 hAt full power, 125 kW
- Payback
- ≈ 6 yearsPrice shifting alone; with solar see below
What it powers and for how long
Hours a full 250 kWh battery runs at a constant load (usable 225 kWh, 90% efficiency):
| Load | Hours |
|---|---|
| Full power, 125 kW | 1.7 h |
| Half power, 62.5 kW | 3.4 h |
| A quarter of the power, 31.3 kW | 6.8 h |
Where this size fits: Supermarkets, workshops, schools and clinics: the class of the common 215–261 kWh cabinets.
Price and what it includes
- Turnkey price
- €55,000–80,000 (excluding VAT)
- Per kWh
- €220–320
- Prices as of
- 4 October 2026
Included: LFP battery cabinets or a container, the power conversion system (PCS), energy management (EMS) and monitoring, installation and commissioning.
Priced per site, not included: transformer and switchgear, fire suppression, foundation, design and the grid-connection fee.
Compare with other sizes and countries: storage price indexA typical day
Model winter weekday: the battery charges in the cheapest night hours and discharges in the evening peak of the day-ahead market. An example, not your site.
- Consumption
- 19 kW
- Battery
- waiting
- From the grid
- 19 kW
- Battery charge
- 100%
- Day-ahead price
- €135/MWh
Above zero: what powers the building; below: where the extra goes (battery or grid)
Payback
- Price shifting alone on Spain's day-ahead market earns about €2,000 a year in SolarPlan's model: not enough to pay back within the battery's 15-year life.
- Spanish company batteries pay back with solar self-consumption: published estimates give about 6 years (5–8 years) for solar + battery. Peak shaving earns little: the 6.1TD demand charge is €23.95 per kW a year. (powercloud, 13 September 2026)
Assumptions
- OMIE 2-hour spread about €92/MWh; the company buys at hourly prices. (Synertics, 29 July 2026)
- One full cycle a day, 90% round-trip efficiency, 15-year life, 1% of the price a year for service; excl. VAT, no grants.
Rules
- A battery is part of the self-consumption installation, with no separate licence. Royal Decree-law 7/2026 lets you deduct 10% of 2026 spending on it from IRPF, up to €500, if the installation is finished and paid for in 2026. (AEE (RDL 7/2026), 20 March 2026)
- RDL 7/2026 gives storage flexible grid access and free depreciation up to €500,000 a year; RD 88/2026 lets behind-the-meter batteries join balancing markets through an independent aggregator (operating rules still being drafted). (AEE (RDL 7/2026), 20 March 2026)
Loans, grants and tax relief
- Free depreciation of the investment up to €500,000 a year (RDL 7/2026). (AEE (RDL 7/2026), 20 March 2026)
- IDAE storage funds go to large stand-alone projects, not to company batteries.
Questions
How much does a 250 kWh battery cost in Spain?
€55,000–80,000 turnkey excl. VAT (€220–320 per kWh) as of 4 October 2026: battery cabinets or container, PCS, EMS, installation and commissioning. Transformer, fire suppression, foundation and the connection fee are priced per site.
How many hours of backup does a 250 kWh battery give?
About 1.7 h at full power (125 kW), 3.4 h at half power and 6.8 h at a quarter of the power.
MW or MWh: what is the difference?
MW is power (how much the system delivers at a moment), MWh is the energy stored. 250 kWh / 125 kW runs about 1.7 h at full power. The business standard is 2 hours: 1 MW / 2 MWh. Always compare both numbers.
Does a 250 kWh battery pay back?
Price shifting alone on Spain's day-ahead market earns about €2,000 a year in SolarPlan's model: not enough to pay back within the battery's 15-year life. Spanish company batteries pay back with solar self-consumption: published estimates give about 6 years (5–8 years) for solar + battery. Peak shaving earns little: the 6.1TD demand charge is €23.95 per kW a year.
Is a licence or permit needed?
A battery is part of the self-consumption installation, with no separate licence. Royal Decree-law 7/2026 lets you deduct 10% of 2026 spending on it from IRPF, up to €500, if the installation is finished and paid for in 2026. RDL 7/2026 gives storage flexible grid access and free depreciation up to €500,000 a year; RD 88/2026 lets behind-the-meter batteries join balancing markets through an independent aggregator (operating rules still being drafted).
Which loans, grants or tax relief apply?
Free depreciation of the investment up to €500,000 a year (RDL 7/2026). IDAE storage funds go to large stand-alone projects, not to company batteries.