Common Mistakes That Increase Your Electric Bill in 2025

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5 Mistakes That Increase Your Electric Bill

Is your electricity bill higher than expected every month? At RenovaEnergy, we’ve identified five common energy consumption mistakes that often go unnoticed but directly impact your bottom line. The good news: they’re easy to fix.

1. Using appliances during peak hours

If you’re on a time-of-use rate like 2.0TD, running your washer, oven, or electric water heater during peak hours (10:00–14:00 and 18:00–22:00) can raise your bill by up to 30%. Shift usage to off-peak hours (night or early morning) to cut costs.

2. Leaving devices on standby

TVs, computers, routers, coffee makers… they all use energy even when “off”. Phantom load can account for 7% or more of your annual bill. Use power strips with switches to fully disconnect them when not in use.

3. Paying for more power capacity than you need

Many homes pay for contracted power they never actually use. At RenovaEnergy, we review your usage patterns to adjust your contracted power and cut fixed monthly costs without sacrificing comfort.

4. Not reviewing your tariff or contract regularly

When was the last time you checked your electricity plan? Rates change—often without warning. You could be overpaying or paying for services you don’t need. Compare options and adjust your tariff if necessary—no need to change providers.

5. Not optimizing your solar installation (if you have one)

If you already have solar panels but aren’t managing your usage well or don’t have a battery, you’re missing out on real savings. A few adjustments in your habits or the right tariff can make a big difference.

Bonus: What if you don’t have solar yet?

A well-designed solar system helps you avoid all these issues at the source: lower your grid usage, reduce fixed charges, and produce your own energy when it matters most.

How RenovaEnergy can help you fix these mistakes

We offer personalized energy audits to identify where you can improve—without changing providers or committing to a system right away. Just real savings with real data.

Want to lower your electric bill? Contact us for a free analysis of your energy use and tariff. No pressure—just expert advice.

Are Solar Panels the Best Option to Power Your Air Conditioning?

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Solar Panels and Air Conditioning: The Perfect Summer Combo?

When the heat hits, air conditioning becomes essential—but so does electricity consumption. At RenovaEnergy, we explain why using your solar panels to power your AC might be one of the smartest energy decisions you can make this summer.

Are solar panels and air conditioning compatible?

Absolutely. In fact, they’re one of the most efficient self-consumption pairings: you generate the most energy when you need it the most. Peak solar radiation hours match the hottest parts of the day—exactly when your AC works hardest.

Benefits of powering your AC with solar energy

  • Direct savings: Avoid using grid electricity during peak-price hours.
  • Smart self-consumption: Use energy as it’s being produced.
  • Comfort without fear: Keep your home cool without worrying about the cost.
  • Lower carbon footprint: Enjoy clean comfort with no emissions.

How many panels do I need to run air conditioning?

It depends on the number of AC units, their power rating, and how long they run. As a general reference, a 2,000W unit used for 5 hours consumes about 10 kWh per day. A properly sized solar system can easily cover this.

What if I’m not home during sunlight hours?

No problem. You can:

  • Install batteries to store energy and use it later.
  • Program your AC to pre-cool the home during peak solar hours.
  • Send excess energy to the grid for credit or use in other appliances.

RenovaEnergy designs systems with your comfort in mind

It’s not just about installing solar panels—it’s about adapting them to your real lifestyle. If you use AC regularly, we design your system to meet that demand and maximize comfort and savings.

Want to know if your current system can power your AC? Or are you considering going solar this summer? Get in touch—we’ll study your case and help you find the best solution.

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.

What Would Life Be Like Without Worrying About Your Power Bill?

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What Would Life Be Like Without Worrying About Your Power Bill?

Just imagine it. A cooler summer, a warmer winter—without fearing the heating or AC bill. No more surprises in your electricity invoice. Thanks to self-consumption, thousands of Spanish households are living this reality.

From paying every month… to generating your own power

When you produce your electricity with solar panels, you’re no longer fully dependent on utility companies. That means you take control of your energy and your spending.

How much can you really save?

A well-designed solar system can reduce your annual electricity bill by 50% to 80%. And if you add a battery or the right tariff, your savings grow even more.

What if prices go up?

It doesn’t matter. You’re generating your own energy. Self-consumption protects you from market volatility and brings long-term stability to your household budget.

Less stress, more freedom

  • Want to charge your EV overnight? You can.
  • Use your appliances without checking the clock? Absolutely.
  • Keep your home warm all winter? Without dreading the next bill.

Is solar installation complicated?

Not at all. At RenovaEnergy, we make it easy: free assessment, fast installation, permits, legal paperwork, and support. You just decide when to start saving.

Peace of mind, installed with your panels

Lowering your electricity bill isn’t just about numbers. It’s about living with less stress and more autonomy. And in today’s world, that’s priceless.

Curious how much you could save? Reach out and we’ll tell you—no obligation.