Every peak above your contracted power is billed on top.
A battery shaves those peaks, makes better use of your panels and keeps the essentials running in a power cut. Sized on your bills.
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1 of 5- We compare several brands
- Licensed local installer
- No-obligation assessment
The problem
What you have spare at midday is worth almost nothing.
€0.03
per kWh
what your surplus earns at midday
€0.22
per kWh
what electricity costs at night
At night you pay more than 6 times as much.
Average wholesale market price, September 2026, from 11:00 to 16:00 and from 19:00 to 22:00. Source: Red Eléctrica (REE), precios horarios del mercado diario, septiembre 2026; cálculo propio, 15-10-2026.
- hours of sunshine a year in Alicante
- 2,850hours of sunshine a year in Alicante
- kWh a year per kW of panels
- 1,630kWh a year per kW of panels
Source: AEMET, valores climatológicos normales Alicante 1981-2010; PVGIS (Comisión Europea), 15-10-2026.
And when the grid goes down, your panels go down with it.
On 28 April 2025 the whole Iberian Peninsula lost power. A standard inverter switches off at that moment, even in full sun. With panels but no backup, you sit in the dark like everyone else.
Work out how long your home would last
28 April 2025, 12:33: no power across the Iberian Peninsula. ENTSO-E
The solution
A battery chosen for what you use, not for the seller's catalogue.
Your sun, at night too
Use what you have spare at midday over dinner, instead of buying it at €0.22 per kWh.
Power in a blackout
With a hybrid inverter with backup, the essentials stay on. You choose which.
The right size
We size it on your bill: not a battery you never fill, nor one that runs out.
We help you choose: we compare several brands, explain the price including VAT (IVA) and a licensed local installer fits it. You deal with us in English.
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Dinner, on the afternoon sun.
What your panels make at midday, saved for when you are home.
Work out how long your home lasts without the grid.
Pick a battery size and what you want to keep on.
Panels switch off
A grid-tied inverter disconnects when the grid goes down.
A battery alone is not enough
You need a hybrid inverter with backup or island mode.
kWh and kW are not the same
kWh is how long you last; kW is what you can run at once.
Battery size
What you want to keep on
With 10 kWh and what you ticked, your home lasts
about 2.5 days
without the grid and without sun.
- Usable capacity
- 9 kWh
- Use per day
- 3.2 kWh
You choose which circuits go on backup; the rest stays off until the grid comes back. Estimate based on typical use and 90% usable capacity. In the assessment we use your own figures.
How we work
- 1
You tell us about your home
A few short questions and an electricity bill.
- 2
We compare
Brands and prices, on your real usage.
- 3
A local installer fits it
A licensed company, with the official certificate (boletín, CIE).
- 4
Legalised
We follow the paperwork through to the end.
What it costs, no small print
Indicative prices including installation, published by installers in Spain in 2026.
- 5 kWh
- €2,500 to €4,500
- 10 kWh
- €5,500 to €7,500
- 15 kWh
- from €7,500
Backup for power cuts: +€800 to €2,000. Sources don't always say whether VAT (IVA) is included. Our proposal always shows it separately (21%). Source: Rangos publicados por instaladores en España, enero y agosto de 2026.
10%
off your income tax if finished in 2026
For Spanish tax residents only. A self-consumption installation with a battery, paid by card or bank transfer and with the official certificate. Base up to €5,000 a year. Non-residents can't use this deduction. Adding a battery to panels you already have: check with your tax adviser.
Source: Real Decreto-ley 7/2026, art. 36 (BOE-A-2026-6544), 21-03-2026.
Until 31 December 2026
A 100% subsidy doesn't exist today: there is no open grant for household batteries in the Valencian Community. IVACE+i
IBI and ICIO discounts for new panels in your town
The discount is for the panels, not the battery, and you apply for it at the town hall. It applies to the property, also if you are not resident.
| Town | IBI (property tax) | ICIO (works tax) |
|---|---|---|
| Alicante | up to 50%, 5 years (max. €300 a year) | 50% |
| Elche | 50%, 3 years | 95% |
| Torrevieja | 50%, 3 years | not listed |
| Santa Pola | 50%, 5 years | 95% |
| San Vicente del Raspeig | 40%, 4 years (max. €300 a year) | 95% |
| Calp | 50% for 3 years, then 25% for 2 years | not listed |
| Dénia | 20 to 50% depending on cadastral value | 95% |
| Benidorm | none | none |
Tax bylaws published in the BOP de Alicante, checked on 15-10-2026.
We don't sell a brand. We tell you which one suits you.
- Usable capacity
- What you can really use, not the brochure figure.
- Compatible
- With your inverter and your panels.
- Backup
- What stays on when the grid goes down.
- Real warranty
- Years, cycles and minimum capacity, often 60%.
- Final price
- Including VAT, installation and legalisation.
For businesses, warehouses, hotels and farms
- Fewer excess power charges
- The battery covers the peaks on your 3.0TD or 6.1TD tariff.
- More self-consumption
- What your panels produce at weekends, for you.
- The essentials keep running
- Cold rooms, pumps, servers and alarms.
- Irrigation at expensive hours
- Pumping runs on panels and battery, not on the grid.
Business self-consumption installations that start operating in 2026: free depreciation, with conditions. Check with your adviser.
What people ask us most
Power during a blackout
Only if the system has a backup function: a hybrid inverter with an EPS output or island mode that separates your home from the grid. Without it, the battery switches off just like the panels. In the assessment we tell you which circuits are covered and for how long.
A second home on the coast
With backup, the fridge, alarm and cameras keep running in a power cut while you are away, and you can check the battery in its app. Tell us if the house is often empty: we take that into account when we size the battery.
Dealing with us in English
You deal with us in English or Dutch. The installer is a licensed Spanish company; we coordinate with them and follow the Spanish paperwork for you, up to the legalisation.
The tax deduction is for residents
The 10% income tax (IRPF) deduction is only for people who pay income tax in Spain. If you are not resident, it doesn't apply to you. The IBI and ICIO discounts from your town hall do, because they go with the property.
If you already have solar panels
It depends on how much you export to the grid and when you use power. If you have a lot spare at midday and buy in the evening, it usually pays. We work it out with a bill and your inverter details.
Whether your inverter can take a battery
Some can, others need a new hybrid inverter or an AC-coupled system. Send us a photo of the inverter label on WhatsApp and we'll tell you.
A virtual battery is not a real battery
A virtual battery is a way of billing: your supplier turns what you export into euros and takes them off later bills. It stores no energy, so it gives you no power in a blackout. A real battery stores the energy in your home and, if the system has backup, keeps the essentials on when the grid goes down.
How long a battery lasts
Lithium iron phosphate (LFP) batteries usually come with a 10-year manufacturer's warranty, with an energy limit and a guaranteed minimum capacity, often 60%. Not every brand gives 10 years. On top of that you have the 3-year legal guarantee as a consumer in Spain.
If your installer no longer exists
We check your installation, tell you what state it is in and whether it can take a battery, and find a local installer for the maintenance.
What we do with your data
We use it only for your request. For the visit and the installation we share it with the partner installer in your area. Nothing else.
Let's talk about your battery.
A few short questions and we get back to you with what you need to know.
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