What Solar Battery Do I Need Based on My Energy Use?

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What Solar Battery Do I Need Based on My Energy Use?

At RenovaEnergy, we know every home is unique. That’s why choosing the right solar battery is key to getting the most out of your photovoltaic system. In this article, we explain how to determine what type and capacity battery you need based on your real energy profile.

Why install a solar battery?

A solar battery allows you to store the energy your panels generate but you don’t use right away. You can then use that stored energy at night or during low-sunlight hours. The result? More grid independence and greater savings.

How to choose the right capacity

Not every household needs the same battery size. Here’s what to consider:

  • Daily electricity use: How many kilowatt-hours (kWh) you consume per day.
  • Usage patterns: Do you consume more energy at night or during the day?
  • Solar production: How much energy your panels generate throughout the day.

Example scenario

If you consume 8 kWh per day and directly use 5 kWh, a battery that stores 3–4 kWh would let you use that surplus energy at night. In this case, a 4–6 kWh battery might be ideal.

Types of solar batteries for homes

  • Lithium-ion: High efficiency, long lifespan, minimal maintenance. The most recommended option today.
  • Lead-acid: Lower upfront cost, but less durable and higher maintenance needs.

What happens if you don’t have a battery?

Without a battery, you can only use solar energy as it’s produced. This means lower actual self-consumption and more reliance on the grid, especially at night.

Do you always need a battery?

Not necessarily. But if your main energy use happens in the evening or if you want maximum independence, a battery makes a big difference. It helps you cover a higher percentage of your electricity needs with clean, self-generated power.

How does RenovaEnergy help you choose?

We carry out a free personalized study to analyze your consumption, habits, and current or planned installation. This allows us to recommend the ideal battery for your home—no overinvestment, no underperformance.

Want to know which battery is right for your energy use? Contact us and we’ll guide you with real data—no obligation.

How Much Solar Energy Can You Generate Depending on Where You Live?

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How Much Solar Energy Can You Generate?

Living in Seville isn’t the same as living in Oviedo. And a south-facing roof doesn’t behave like one facing north. At RenovaEnergy, we know from experience: solar production depends on your location. That’s why every installation must be adapted to where you live. Here’s what to expect based on your region.

Spain: a country with huge solar potential

The good news is that nearly the entire country enjoys high solar radiation levels. Even the northern regions receive more sunlight than many parts of Central Europe where solar power is booming.

Average annual production by region

  • Andalusia, Murcia, Extremadura: 1,600 to 1,800 kWh per kW installed
  • Madrid, Castilla-La Mancha, Valencia: 1,400 to 1,600 kWh/kW
  • Galicia, Asturias, Cantabria, Basque Country: 1,100 to 1,300 kWh/kW
  • Canary Islands: very high year-round output—ideal for self-consumption

Other important factors

  • Roof orientation: South is ideal, but East and West also work well
  • Tilt angle: 30º to 35º is optimal, but can be adjusted
  • Shade: Trees, buildings, or obstructions reduce performance

Can I find out how much energy I’ll generate?

Yes. RenovaEnergy provides a free technical assessment where we estimate your annual energy production based on your roof, region, and energy use. So you know exactly how much you can save.

Is it worth it even in the north?

Absolutely. Even with slightly lower production, you’ll still see real savings. Combine solar with batteries or the right tariff and you’ll have a very attractive return on investment.

Want to know how much energy you can generate at home? Request a free study and we’ll show you the numbers.