Home battery · Spain
5 kWh battery for solar panels in Spain: 2026 installed price
A 5 kWh home battery costs €3,500–5,500 turnkey in Spain (€700–1,100 per kWh, VAT included, prices of 4 October 2026). Full, it keeps the essentials (0.4 kW: router, lights, fridge, boiler pump) running for about 11 h.
Free. A few questions, then a plan with sizes, prices and payback.
13:00Battery 100% · waiting
- Sent to the grid2.1 kW
- Sun → home0.7 kW
Price and what it includes
- Turnkey price
- €3,500–5,500VAT included
- Per kWh
- €700–1,100Battery, inverter and installation
- Backup
- 11 hEssentials, 0.4 kW
- Payback
- 15 yearsWith 4 kW of solar
What it powers and for how long
Hours a full 5 kWh battery keeps these loads running in an outage (usable 4.5 kWh, 90% efficiency):
| Load | Hours |
|---|---|
| Essentials: router, lights, fridge, gas-boiler pump (0.4 kW) | 11 h |
| Essentials + water pump and washing machine (1.0 kW) | 4.3 h |
| Most of the house, without electric cooking and water heating (2.0 kW) | 2.1 h |
Price and what it includes
- Turnkey price
- €3,500–5,500 (vAT included)
- Per kWh
- €700–1,100
- Prices as of
- 4 October 2026
Included: LFP battery modules, a hybrid inverter of 3.6 kW, installation and set-up. Solar panels are priced separately.
Compare with other sizes and countries: storage price indexA typical day
Model day with 4 kW of solar in summer: the battery fills at midday and covers the evening. An example, not your house.
- Consumption
- 0.7 kW
- Sun
- 2.8 kW
- Battery
- waiting
- To the grid
- 2.1 kW
- Battery charge
- 100%
Above zero: what powers the home; below: where the extra goes (battery or grid)
Payback
- A battery alone saves about €110 a year on the 2.0TD tariff: no payback within its 15-year life.
- With 4 kW of solar the whole system (€8,300–9,900) pays back in about 15 years; without the battery, 10 years.
- Most Spanish homes buy a battery for independence and backup: 61% of new home solar systems in 2025 came with one. (SmartGridsInfo (UNEF), 12 June 2026)
Assumptions
- A house using 5,300 kWh a year, Madrid; 2.0TD tariff periods; 90% efficiency, 15-year life, VAT included, 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)
Loans, grants and tax relief
- Many towns give IBI and ICIO bonuses for self-consumption: your plan lists the ones at your address.
Questions
How much does a 5 kWh battery cost in Spain?
€3,500–5,500 turnkey (€700–1,100 per kWh, VAT included) as of 4 October 2026: LFP battery, a 3.6 kW hybrid inverter, installation and set-up. Solar panels are extra.
How many hours of backup does a 5 kWh battery give?
A full battery runs the essentials (0.4 kW) for about 11 h, 1.0 kW for about 4.3 h and 2.0 kW for about 2.1 h.
Does a 5 kWh battery pay back?
A battery alone saves about €110 a year on the 2.0TD tariff: no payback within its 15-year life. With 4 kW of solar the whole system (€8,300–9,900) pays back in about 15 years; without the battery, 10 years.
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.
Which loans, grants or tax relief apply?
Many towns give IBI and ICIO bonuses for self-consumption: your plan lists the ones at your address.