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concept of the energy crisis and the increasing demand for electricity and gas energy industry

<h3>A Wake Up Call for Portuguese Residents</h3><p>Last week's nationwide blackout and the resulting surge in electricity prices have given many homeowners and business owners in Portugal a new reason to think seriously about energy independence.</p><p>On April 28th, a catastrophic grid failure in Spain sent shockwaves through the Iberian power system, temporarily cutting electricity supply to millions across Portugal. In response, <strong>Portugal suspended electricity imports from Spain</strong> <strong>— a country it typically relies on for about 20% of its power. This led to an immediate and dramatic spike in wholesale electricity prices.</strong></p><p>At one point, <strong>Portuguese wholesale power prices were nearly five times higher than those in Spain</strong>, due to the temporary halt in energy imports. <strong>For context: on Tuesday following the blackout, Spain’s average price was just €10.24/MWh, while Portugal’s had jumped to €47.92/MWh.</strong></p><p>Although most households and businesses won’t feel the pinch right away due to fixed contracts, this event has laid bare a vulnerability: Portugal's heavy dependence on imported electricity and a centralised grid.</p><figure id="figure-ew94fnadeomai31yv5"><img id="ew94fnadeomai31yv5" src="https://media.gettyimages.com/id/1310120654/photo/concept-of-earth-wildfire-view-from-space-rotation-day-to-night-skyline-greenhouse-gas-effect.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=0IL3Ls0aNvmd2iKSkd0heQvfW0R_amDQ085Fv66uJNk=" alt="Concept of Earth wildfire view from space rotation day to night skyline. Greenhouse gas effect. Realistic 3d rendering animation. elements of this image furnished by NASA." title="Concept of Earth wildfire view from space rotation day to night skyline. Greenhouse gas effect. Realistic 3d rendering animation. elements of this image furnished by NASA." class="object-cover bg-gray-100 rounded-sm md:rounded-md lg:rounded-lg" style="aspect-ratio: 16/9; object-position: center center;" data-corners="default" data-aspect="16:9" data-caption="" data-positionx="undefined" data-positiony="undefined" data-fullwidth="false" data-mce-src="https://media.gettyimages.com/id/1310120654/photo/concept-of-earth-wildfire-view-from-space-rotation-day-to-night-skyline-greenhouse-gas-effect.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=0IL3Ls0aNvmd2iKSkd0heQvfW0R_amDQ085Fv66uJNk=" data-mce-style="aspect-ratio: 16/9; object-position: center center;"></figure><h3>Why This Matters for Solar<br></h3><p>At Sol Viva, we’ve long advocated for solar energy not just as a green investment, but as a resilience strategy. The recent blackout and resulting market volatility highlight the importance of:</p><ul><li>Generating your own electricity locally<br></li><li>Installing solar-plus-storage systems that work even when the grid goes down</li><li>Reducing reliance on energy imports and price fluctuations</li><li>Spain’s advanced rollout of solar plants has helped them maintain cheaper, more stable power. In contrast, Portugal has lagged behind, increasing its exposure to volatility.</li></ul><h3>A Look Ahead<br></h3><p>Portugal’s grid operator, REN, is cautiously reintroducing limited imports from Spain, but with strict limits in place. Meanwhile, the government is working on a phased plan to normalise trade and improve grid resilience.</p><figure id="figure-5g5lz5alsmai3b3oa"><img id="5g5lz5alsmai3b3oa" src="https://media.gettyimages.com/id/2153354026/photo/person-stargazing-under-a-starry-night-sky-with-the-milky-way.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=5fe-ujbmZSdvEOYi9zlUndQhWIDSzoPwn8ZX9xKtlkw=" alt="Person Stargazing Under a Starry Night Sky with the Milky Way" title="Person Stargazing Under a Starry Night Sky with the Milky Way" class="object-cover bg-gray-100 rounded-sm md:rounded-md lg:rounded-lg" style="aspect-ratio: 16/9; object-position: center center;" data-corners="default" data-aspect="16:9" data-caption="" data-positionx="undefined" data-positiony="undefined" data-fullwidth="false" data-mce-src="https://media.gettyimages.com/id/2153354026/photo/person-stargazing-under-a-starry-night-sky-with-the-milky-way.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=5fe-ujbmZSdvEOYi9zlUndQhWIDSzoPwn8ZX9xKtlkw=" data-mce-style="aspect-ratio: 16/9; object-position: center center;"></figure><p>But for homeowners and businesses, the takeaway is clear: the national grid isn’t bulletproof.</p><p>Whether you want to protect your home from future blackouts, shield your business from price hikes, or take control of your long-term energy use, now is the time to act.</p><h3>How Sol Viva Can Help<br></h3><p>We specialise in:</p><ul><li>Designing custom solar and battery systems<br></li><li>Navigating Portugal’s solar market and installer landscape<br></li><li>Helping expats and locals invest with confidence<br></li><li>Reach out today for a personalised energy consultation. Let's make sure you're not left in the dark next time the grid goes down.</li></ul><p>Visit www.solviva.biz or message us on WhatsApp: +351 910 048 100</p>

Power prices surge in Portugal as it suspends Spain link after blackout

<p><br>On April 28th, 2025, much of Portugal was plunged into darkness due to a widespread power outage that disrupted homes, businesses, transport systems, and daily life across the country. For many, the blackout was a stark reminder of how dependent we’ve become on a centralised power grid — and how vulnerable that system can be.</p><h3>What Happened?</h3><p>The outage stemmed from a failure in the high-voltage transmission network, which caused cascading issues throughout the grid. While authorities acted quickly to restore power, many areas experienced extended blackouts lasting several hours. During this time, critical services were disrupted, and thousands of households were left without lights, refrigeration, internet, or heating/cooling — some with no information about what was happening or when service would return.</p><h3>How It Affected Individuals</h3><p>For residents - especially those new to Portugal or living in rural or coastal areas — the outage brought real challenges:</p><ul><li><strong>Fridges and freezers</strong> warmed up, risking food spoilage.</li><li><strong>Work-from-home routines were disrupted</strong>, including dropped Zoom calls and lost productivity.</li><li><strong>Families with young children or elderly relatives </strong>faced uncertainty and discomfort.</li><li><strong>Security systems and electric gates</strong> were temporarily out of action.</li></ul><p>It wasn’t just an inconvenience — it was a wake-up call.</p><h3>What Can Homeowners Learn from This?</h3><p>The main takeaway? <strong>Energy resilience matters.</strong></p><p>Most people assume power will always be available — until it isn’t. As climate events become more extreme and energy demand increases, outages are likely to become more frequent. For homeowners in Portugal, especially those with a long-term view, now is the moment to rethink how you power your home.</p><p>Here’s what we learned:</p><ul><li>The national grid, while generally stable, isn’t immune to large-scale disruptions.</li><li>Having backup energy, such as a home solar system with battery storage, can keep your essentials running even when the grid goes down.</li><li>Installing solar isn’t just about saving money — it’s about gaining independence and security.</li></ul><figure id="figure-ns2sf9yg2mab27eyq"><img id="ns2sf9yg2mab27eyq" src="https://media.gettyimages.com/id/1471183678/photo/flashlight-disaster-goods.jpg?b=1&s=2048x2048&w=0&k=20&c=DU_6A8UlBQotKqJSaoy7VHc0X6nLAZqEx1N7burHx0o=" alt="flashlight. disaster goods." title="flashlight. disaster goods." class="object-cover bg-gray-100 rounded-sm md:rounded-md lg:rounded-lg" style="aspect-ratio: 16/9; object-position: center center;" data-corners="default" data-aspect="16:9" data-caption="" data-positionX="undefined" data-positionY="undefined" data-fullWidth="false"/></figure><h3>How Solar Can Keep You Powered, Even When the Grid Fails<br></h3><p>When paired with battery storage, a solar system can power your home day and night, even during outages. With a well-designed system, you can:</p><ul><li>Keep your lights on</li><li>Power essential appliances</li><li>Charge phones, laptops, and medical equipment</li><li>Stay connected during emergencies</li></ul><p>At Sol Viva, we specialise in helping international residents in Portugal navigate the solar journey — from choosing the right system to finding trusted local installers.</p><p>We help you:</p><ul><li>Understand your energy needs</li><li>Design a system that includes solar panels and backup batteries</li><li>Get quotes from reliable, vetted installers</li><li>Translate the technical and bureaucratic details</li></ul><p>Make sure you’re set up to benefit from current VAT incentives (before they expire in 2025)</p><h3>Next Steps: Don’t Wait for the Next Blackout<br></h3><p>If the recent outage shook your confidence in the grid, it’s time to take action. Energy independence is no longer a luxury — it’s a smart investment in your home, your family’s well-being, and your peace of mind.</p><ul><li>Start with a free consultation to understand what solar + storage would look like for your property.</li><li>Act before June 2025 to take advantage of the 6% VAT on solar installations — after that, it jumps to 23%.</li><li>We’ll guide you every step of the way, from concept to commissioning.</li></ul><p>Want to keep the lights on next time?<br></p><ul><li>Book your free consultation <a data-mce-href="https://calendly.com/solvivapt/30min" href="https://calendly.com/solvivapt/30min">here</a></li><li>Or email us at <a href="mailto:solvivapt@gmail.com" data-mce-href="mailto:solvivapt@gmail.com">solvivapt@gmail.com</a></li><li>Sol Viva — <strong>Solar, Simplified. For Life in Portugal.</strong></li></ul>

Lessons from Portugal’s Recent Power Outage: Why Now Is the Time to Go Solar Post

Workman standing on the ground trying to fasten solar batteries together, installing process

<h2>Understanding Solar Panel Systems</h2><p>Solar panel systems are popular in Portugal due to the country's abundant sunshine and growing awareness of renewable energy. These systems not only reduce electricity bills but also contribute to a sustainable future. Regular maintenance can help to ensure the efficiency and longevity of your system. In this post, we will explore some DIY solar maintenance tips for homeowners in Portugal.</p><figure id="figure-5raq83wp66ma5mo8du"><img id="5raq83wp66ma5mo8du" src="https://media.gettyimages.com/id/1331795324/photo/human-hand-touching-solar-panel.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=-N8aoPzNoYwkuvJp5z-K_-0ijinysD2PNDWxLcByGGA=" alt="solar panels sunshine" class="object-cover bg-gray-100" style="aspect-ratio: 16/9;" data-mce-src="https://media.gettyimages.com/id/1331795324/photo/human-hand-touching-solar-panel.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=-N8aoPzNoYwkuvJp5z-K_-0ijinysD2PNDWxLcByGGA=" data-mce-style="aspect-ratio: 16/9;"></figure><h3>Inspecting Your Solar Panels</h3><p>Regular visual inspections are the first step in maintaining your solar panels. Check for any signs of damage, such as cracks or discoloration on the panels. Additionally, ensure that there are no obstructions like leaves, branches, or debris blocking sunlight. It's also important to verify that the mounting hardware is secure and not corroded.</p><h3>Cleaning Your Solar Panels</h3><p>Keeping your solar panels clean is essential for optimal performance. Dust and dirt can accumulate on the surface, reducing their efficiency. Use a soft brush or a hose with a gentle spray to remove dirt and grime. Avoid using harsh chemicals or abrasive materials that might scratch the panels. Cleaning should ideally be done in the early morning or late afternoon to prevent thermal shock from the sun's heat.</p><figure id="figure-akrapp0izdma5mo8du"><img id="akrapp0izdma5mo8du" src="https://media.gettyimages.com/id/1173740574/photo/team-meeting-of-renewable-energy-engineers-working-on-an-innovative-more-efficient-solar.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=Wo01h3VjlG80jPJv3vLhPnk-wLFSKlTKCyXanxTY6mA=" alt="Team Meeting of Renewable Energy Engineers Working on an Innovative More Efficient Solar Panel Battery Concept. Group of Specialists Gathered Around Table, Solving Problems. Bright Research Facility" title="Team Meeting of Renewable Energy Engineers Working on an Innovative More Efficient Solar Panel Battery Concept. Group of Specialists Gathered Around Table, Solving Problems. Bright Research Facility" class="object-cover bg-gray-100 rounded-sm md:rounded-md lg:rounded-lg" style="aspect-ratio: 16/9; object-position: center center;" data-corners="default" data-aspect="16:9" data-caption="" data-positionx="null" data-positiony="null" data-fullwidth="false" data-mce-src="https://media.gettyimages.com/id/1173740574/photo/team-meeting-of-renewable-energy-engineers-working-on-an-innovative-more-efficient-solar.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=Wo01h3VjlG80jPJv3vLhPnk-wLFSKlTKCyXanxTY6mA=" data-mce-style="aspect-ratio: 16/9; object-position: center center;"></figure><h3>Monitoring Energy Output</h3><p>It's important to monitor your solar system's energy output regularly. Most systems come with monitoring software or a mobile app that provides real-time data on performance. Look for any significant drops in energy production, which might indicate an issue with the system. If you notice consistent underperformance, it might be time to consult with a professional.</p><h3>Maintaining Inverter Equipment</h3><p>The inverter is a crucial component of your solar system, converting DC electricity from the panels into AC electricity for home use. Regularly check the inverter display for error messages or warning lights. Ensure it's free from dust and dirt, and if necessary, wipe it down with a dry cloth. If you encounter persistent issues, seeking professional assistance is advisable.</p><figure id="figure-wcw8ltdv7ma5mo8du"><img id="wcw8ltdv7ma5mo8du" src="https://media.gettyimages.com/id/1398154247/photo/certified-technician-working-on-home-with-solar-panels.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=jF1aQb58fxIE3l_s0dcTKJ5JHJhD9K940lZetruWw2U=" alt="solar inverter maintenance" class="object-cover bg-gray-100" style="aspect-ratio: 16/9;" data-mce-src="https://media.gettyimages.com/id/1398154247/photo/certified-technician-working-on-home-with-solar-panels.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=jF1aQb58fxIE3l_s0dcTKJ5JHJhD9K940lZetruWw2U=" data-mce-style="aspect-ratio: 16/9;"></figure><h3>Checking Electrical Connections</h3><p>Inspecting the electrical connections can prevent potential hazards and ensure the safe operation of your system. Make sure all wires are intact and not exposed or damaged by pests. If you're uncomfortable handling electrical components, consider hiring a certified technician to perform a thorough inspection periodically.</p><h3>Seasonal Maintenance Tips</h3><p>Portugal experiences varied weather conditions throughout the year, which can affect your solar panels. In the autumn, remove fallen leaves from around the panels to prevent shading. During winter, ensure that snow and ice do not accumulate on the panels, although this is less common in Portugal's mild climate. Regular checks in each season can prevent long-term damage.</p><h3>Benefits of Regular Maintenance</h3><p>Consistent maintenance of your solar system not only enhances its efficiency but also extends its lifespan. By investing a small amount of time in upkeep, you can maximize your return on investment and enjoy reliable energy supply for years to come. Additionally, well-maintained systems contribute positively to property value.</p><figure id="figure-o2fmow9j7cma5mo8du"><img id="o2fmow9j7cma5mo8du" src="https://media.gettyimages.com/id/1276551349/photo/mature-man-looking-at-solar-panels-on-the-roof.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=2X1IaxpT3wpSfVxNThhO0J3Ug9LVAGDXYZVyqxuTIsE=" alt="home solar maintenance" class="object-cover bg-gray-100" style="aspect-ratio: 16/9;" data-mce-src="https://media.gettyimages.com/id/1276551349/photo/mature-man-looking-at-solar-panels-on-the-roof.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=2X1IaxpT3wpSfVxNThhO0J3Ug9LVAGDXYZVyqxuTIsE=" data-mce-style="aspect-ratio: 16/9;"></figure><h3>When to Call a Professional</h3><p>While DIY maintenance can handle many routine tasks, there are times when professional help is necessary. If you notice any major issues such as significant drops in performance, damaged panels, or persistent error codes from your inverter, it's best to call in experts. They have the tools and expertise to address complex issues safely and effectively.</p>

DIY Solar Maintenance Tips for Homeowners in Portugal

Man restoring power on circuit breaker after electricity outage

<p>A common misconception about solar energy is that if you have solar panels on your roof, your home will stay powered during a blackout. Unfortunately, that’s not always the case. If you're considering solar — or already have a system installed — it's essential to understand how different types of solar setups behave when the grid goes down, and what backup options are available to keep your home running.</p><h3>Why Grid-Tied Solar Goes Dark in a Power Outage</h3><p>Most residential solar installations in Portugal are grid-tied systems. These connect directly to the utility grid and work by feeding solar energy into your home and exporting excess power to the electrical network.</p><p>However, during a power outage, these systems automatically shut down to prevent any electricity from flowing back to the grid.&nbsp; This is a safety feature called anti-islanding protection and is a safety feature to prevent workers on the line from being electrocuted during a power outage. This means that even with bright sunlight, your solar system won’t power your home unless it includes a backup solution.</p><figure id="figure-lcgbvcvnpbma56jfzx"><img id="lcgbvcvnpbma56jfzx" src="https://media.gettyimages.com/id/1620576275/photo/close-up-view-of-home-battery-storage-system-on-building-facade.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=ZctMJ-P05kPHL276dm5ua4ueyb0gNMPzXbG4RSPPPR0=" alt="Close-up View Of Home Battery Storage System On Building Facade" title="Close-up View Of Home Battery Storage System On Building Facade" class="object-cover bg-gray-100 rounded-sm md:rounded-md lg:rounded-lg" style="aspect-ratio: 16/9; object-position: center center;" data-corners="default" data-aspect="16:9" data-caption="" data-positionx="undefined" data-positiony="undefined" data-fullwidth="false" data-mce-src="https://media.gettyimages.com/id/1620576275/photo/close-up-view-of-home-battery-storage-system-on-building-facade.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=ZctMJ-P05kPHL276dm5ua4ueyb0gNMPzXbG4RSPPPR0=" data-mce-style="aspect-ratio: 16/9; object-position: center center;"></figure><h3>Your Options for Backup Power</h3><p>To stay powered during a grid failure, you’ll need a solar system that includes battery storage and the right inverter configuration. </p><p>Here are your main options:</p><h3>1. Hybrid Inverter + Battery System</h3><p>Hybrid inverters allow solar panels to charge a battery, which can then power the home when the grid is down.</p><ul><li><strong>Examples:</strong> Huawei SUN2000 with LUNA battery, FoxESS with FO battery</li><li><strong>Switching:</strong> Automatic in most setups<br></li><li><strong>Limitations:</strong> Usually only powers "critical loads" like lighting, fridge, internet, etc.</li></ul><p>These systems often require a dedicated backup circuit or load panel and, with Huawei, require a transfer switch to transfer power during an outage.</p><h3>Fox ESS Hybrid Inverters</h3><p>FoxESS hybrid inverters come with an EPS (Emergency Power Supply) output which provides backup power automatically during a grid outage. When paired with a Fox battery and correctly installed, the EPS can seamlessly supply power to essential circuits like refrigeration, lighting, and internet.</p><ul><li><strong>Switching:</strong> Automatic when configured with EPS<br></li><li><strong>Limitation:</strong> EPS usually only supports critical loads, not the entire home</li></ul><p>It's important that your installer wires a dedicated critical load panel for the EPS to function properly.</p><h3>2. Tesla Powerwall<br></h3><p>The Tesla Powerwall is one of the most seamless solar backup solutions on the market.</p><ul><li><strong>Automatic switching</strong> via the Tesla Backup Gateway<br></li><li>Powers critical or entire home loads depending on the number of Powerwalls<br></li><li>Solar panels continue to charge the battery during outages<br></li></ul><p>Limitations: Higher upfront cost and may require multiple units for large homes.</p><h3>3. Manual Generator (Non-Solar)</h3><p>Diesel or gas generators can also provide emergency power.</p><ul><li>Effective for long outages<br></li><li>Not sustainable or clean<br></li><li>Requires manual start-up and fuel storage<br></li></ul><figure id="figure-0n6gfi6o1ma56kjnp"><img id="0n6gfi6o1ma56kjnp" src="https://media.gettyimages.com/id/1301269398/photo/electrician-working-at-electric-panel.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=xvZ8ZprxQkLDsBsLLEOaj7v4UpdsOO7nCWKN_bs7BSA=" alt="Electrician working at electric panel" title="Electrician working at electric panel" class="object-cover bg-gray-100 rounded-sm md:rounded-md lg:rounded-lg" style="aspect-ratio: 16/9; object-position: center center;" data-corners="default" data-aspect="16:9" data-caption="" data-positionx="undefined" data-positiony="undefined" data-fullwidth="false" data-mce-src="https://media.gettyimages.com/id/1301269398/photo/electrician-working-at-electric-panel.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=xvZ8ZprxQkLDsBsLLEOaj7v4UpdsOO7nCWKN_bs7BSA=" data-mce-style="aspect-ratio: 16/9; object-position: center center;"></figure><h3>How Much of Your Home Can You Back Up?<br></h3><p>It depends on your system size and setup:</p><table style="border-collapse: collapse; width: 100%;" border="1" data-mce-style="border-collapse: collapse; width: 100%;"><tbody><tr><td style="width: 33.3325%;" data-mce-style="width: 33.3325%;"><strong>Backup Type</strong></td><td style="width: 33.3325%;" data-mce-style="width: 33.3325%;"><strong>What It Powers</strong></td><td style="width: 33.335%;" data-mce-style="width: 33.335%;"><strong>Notes</strong></td></tr><tr><td style="width: 33.3325%;" data-mce-style="width: 33.3325%;">Critical loads only</td><td style="width: 33.3325%;" data-mce-style="width: 33.3325%;">Lights, fridge, Wi-Fi, select outlets</td><td style="width: 33.335%;" data-mce-style="width: 33.335%;">Most common hybrid setup</td></tr><tr><td style="width: 33.3325%;" data-mce-style="width: 33.3325%;">Whole home (limited)</td><td style="width: 33.3325%;" data-mce-style="width: 33.3325%;">All circuits with usage management</td><td style="width: 33.335%;" data-mce-style="width: 33.335%;">Avoid running high-load appliances simultaneously</td></tr><tr><td style="width: 33.3325%;" data-mce-style="width: 33.3325%;">Whole home + solar charging</td><td style="width: 33.3325%;" data-mce-style="width: 33.3325%;">All circuits + solar recharging capability</td><td style="width: 33.335%;" data-mce-style="width: 33.335%;">Tesla Powerwall-style systems</td></tr><tr><td style="width: 33.3325%;" data-mce-style="width: 33.3325%;">No backup</td><td style="width: 33.3325%;" data-mce-style="width: 33.3325%;">Nothing during outages</td><td style="width: 33.335%;" data-mce-style="width: 33.335%;">Standard grid-tied systems</td></tr></tbody></table><h3>Questions to Ask Your Installer</h3><p>Before installing or upgrading your solar system, ask:</p><ul><li>Is this a hybrid inverter that supports battery backup?<br></li><li>Do I need a separate backup/load panel?<br></li><li>Will the system switch over automatically during an outage?<br></li><li>Can I expand the system in the future?</li></ul><h3>Final Thoughts</h3><figure id="figure-wk0epleux9ma56m2rj"><img id="wk0epleux9ma56m2rj" src="https://media.gettyimages.com/id/915347330/photo/final-thoughts.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=Jn_PrqCYThIUPZ-jr_DBs77VRZ_4bxLk03OKBC2YrYA=" alt="Final thoughts" title="Final thoughts" class="object-cover bg-gray-100 rounded-sm md:rounded-md lg:rounded-lg" style="aspect-ratio: 16/9; object-position: center center;" data-corners="default" data-aspect="16:9" data-caption="" data-positionx="undefined" data-positiony="undefined" data-fullwidth="false" data-mce-src="https://media.gettyimages.com/id/915347330/photo/final-thoughts.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=Jn_PrqCYThIUPZ-jr_DBs77VRZ_4bxLk03OKBC2YrYA=" data-mce-style="aspect-ratio: 16/9; object-position: center center;"></figure><p>A standard solar setup alone won’t keep your lights on during a power outage. To enjoy true energy independence, you need the right combination of inverter, battery, and backup configuration.</p><p>At Sol Viva, we help international homeowners in Portugal choose solar systems that are resilient, cost-effective, and future-ready.</p><p>Ready to make sure your home stays powered even when the grid goes down?</p><p><a data-mce-href="https://solviva.biz/contact" href="https://solviva.biz/contact">Contact us </a>or <a data-mce-href="https://calendly.com/solvivapt/30min" href="https://calendly.com/solvivapt/30min">book a slot</a> to talk.</p>

Will a Solar Plant Operate During a Power Outage?

<p>Our clients often ask us if their solar panels will still generate power during cloudy days and by how much their system performance will change between summer and winter.</p><p>Solar panel performance in Portugal varies significantly between winter and summer and between sunny and cloudy days due to changes in solar irradiance (sunlight energy), temperature, and daylight hours. Here's a breakdown:</p><h3>Summer vs Winter Performance</h3><p><strong>Summer (June to August)</strong></p><ul><li>Up to ~15 hours of sunlight per day.</li><li>Peak performance, especially in regions like the Alentejo and Algarve.</li><li>Systems often generate 3 to 5 times more electricity/day than in winter.</li><li>Panels can become slightly less efficient when very hot, but high irradiance compensates.</li></ul><p><strong>Winter (December to February)</strong></p><ul><li>As little as ~9.5 hours of light.</li><li>The sun sits lower in the sky, reducing intensity.</li><li>Particularly in the north (e.g. Porto, Braga), leads to decreased output.</li><li>Expect a 60–80% drop in energy production compared to summer.</li></ul><h3>Sunny vs Cloudy Days</h3><p><strong>Sunny Days</strong></p><ul><li>Panels operate near their maximum capacity.</li><li>Clear skies allow direct sunlight which is ideal for solar generation.</li></ul><p><strong>Cloudy Days</strong></p><ul><li>Panels still generate power but at 10–30% of max output, depending on cloud thickness.</li><li>Thin clouds might reduce output by only 20%, while thick overcast days can reduce it by 80% or more.</li></ul><h3>Example Output (6 kW system in Lisbon)</h3><table style="border-collapse: collapse; width: 100%;" border="1" data-mce-style="border-collapse: collapse; width: 100%;"><tbody><tr><td style="width: 50%;" data-mce-style="width: 50%;"><strong>Month</strong></td><td style="width: 50%;" data-mce-style="width: 50%;"><strong>Average Daily Production</strong></td></tr><tr><td style="width: 50%;" data-mce-style="width: 50%;">July</td><td style="width: 50%;" data-mce-style="width: 50%;">~36 to 42 kWh/day</td></tr><tr><td style="width: 50%;" data-mce-style="width: 50%;">January</td><td style="width: 50%;" data-mce-style="width: 50%;">~8 to 14 kWh/day</td></tr><tr><td style="width: 50%;" data-mce-style="width: 50%;">Sunny Day</td><td style="width: 50%;" data-mce-style="width: 50%;">35 to 40 kWh</td></tr><tr><td style="width: 50%;" data-mce-style="width: 50%;">Cloudy Day</td><td style="width: 50%;" data-mce-style="width: 50%;">5 to 10 kWh</td></tr></tbody></table><h3>Summary<br></h3><p><strong>Portugal is ideal for solar: </strong>High annual irradiance (~1600 to 2000 kWh/m²/year).</p><p><strong>Summer is your sweet spot:</strong> Most energy is generated from May to September.</p><p><strong>Storage helps:</strong> Batteries can balance out low winter production.</p><p><strong>Panel tilt &amp; orientation: </strong>Optimising for winter sun (lower angle) can improve seasonal performance.</p>

Can my Solar Panels Generate Power During Cloudy Days and in the Winter?

Aerial images in a residential area in a village in Portugal, with the sea in the background

<h2>Understanding Solar Energy in Portugal</h2><p>Portugal, with its abundant sunshine, is an ideal location for harnessing solar energy. For expats moving to this sun-drenched country, the potential for solar power can be both intriguing and a bit mystifying. There's no shortage of myths surrounding solar energy, and it’s important to distinguish fact from fiction.</p><figure id="figure-1tcq86g8gsm9ohdvf1"><img id="1tcq86g8gsm9ohdvf1" src="https://media.gettyimages.com/id/643477462/photo/renewable-energy.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=zG9vlwhaVfmwJL_QLbjS7V29ZgItNuMCnds_kxtThto=" alt="solar panels Portugal" class="object-cover bg-gray-100" style="aspect-ratio: 16/9;" data-mce-src="https://media.gettyimages.com/id/643477462/photo/renewable-energy.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=zG9vlwhaVfmwJL_QLbjS7V29ZgItNuMCnds_kxtThto=" data-mce-style="aspect-ratio: 16/9;"></figure><h3>Myth 1: Solar Energy is Still Expensive</h3><p>A common misconception is that solar energy systems are prohibitively expensive. While the initial investment might seem high, the long-term savings can significantly reduce costs. Current return on investment for a panel only system is ±2-3 years and for systems with a battery are 4-5 years. Once paid off, it's free electricity from there.</p><h3>Myth 2: Solar Panels Don’t Work on Cloudy Days</h3><p>Another prevalent myth is that solar panels are ineffective on cloudy days. While it’s true that solar panels operate at peak efficiency under direct sunlight, they can still generate 10-30% of their power depending on cloud thickness. Thin clouds might reduce output by only 20%, while thick overcast days can reduce it by 80% or more.</p><figure id="figure-es0ojsvlom9ohdvf1"><img id="es0ojsvlom9ohdvf1" src="https://media.gettyimages.com/id/455839385/photo/solar-panel-in-winter.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=Yglrj5_quCWLLU9ageYdA5mB6gvSNd617Pm7jwqESfQ=" alt="cloudy sky with solar panels" class="object-cover bg-gray-100" style="aspect-ratio: 16/9;" data-mce-src="https://media.gettyimages.com/id/455839385/photo/solar-panel-in-winter.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=Yglrj5_quCWLLU9ageYdA5mB6gvSNd617Pm7jwqESfQ=" data-mce-style="aspect-ratio: 16/9;"></figure><h3>Myth 3: Maintenance is Complicated and Costly</h3><p>Many believe that maintaining a solar energy system is both challenging and expensive. In reality, solar panels require minimal maintenance. Regular cleaning to remove dust and debris, along with occasional inspections to ensure everything is functioning correctly, are usually sufficient.</p><p>The durability of modern solar panels means they can last for decades with minimal upkeep. International homeowners should consider scheduling annual or bi-annual check-ups with a local service provider to ensure their system’s efficiency.</p><h3>Myth 4: Solar Energy Isn’t a Reliable Source</h3><p>Some might argue that solar energy isn’t reliable due to its dependence on weather conditions. However, the integration of battery storage systems has enhanced the reliability of solar power. These systems store excess energy produced during sunny periods for use during the night or cloudy days.</p><figure id="figure-91ux6sg0ojm9ohdvf1"><img id="91ux6sg0ojm9ohdvf1" src="https://media.gettyimages.com/id/2042546258/photo/energy-storage-power-station-in-the-morning.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=Nmv1-D0SSGWVZHgOBANvySdbGUiAX3FIa4TXqQ__5xM=" alt="solar battery storage" class="object-cover bg-gray-100" style="aspect-ratio: 16/9;" data-mce-src="https://media.gettyimages.com/id/2042546258/photo/energy-storage-power-station-in-the-morning.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=Nmv1-D0SSGWVZHgOBANvySdbGUiAX3FIa4TXqQ__5xM=" data-mce-style="aspect-ratio: 16/9;"></figure><p>For international residents in Portugal, this means they can enjoy a consistent energy supply, reducing reliance on the national grid and ensuring energy security even during less sunny periods.</p><h2>The Benefits of Going Solar in Portugal</h2><p><strong>Transitioning to solar power offers numerous benefits, including reduced energy bills, environmental sustainability, and increased property value.</strong> By debunking these myths, you can make informed decisions about adopting solar technology in your home.</p><p>Portugal’s commitment to renewable energy with lower tax rates of 6% also makes it an excellent place for&nbsp; to invest in solar power.&nbsp;</p><figure id="figure-hqcs8nkdsgm9ohdvf1"><img id="hqcs8nkdsgm9ohdvf1" src="https://media.gettyimages.com/id/643477462/photo/renewable-energy.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=zG9vlwhaVfmwJL_QLbjS7V29ZgItNuMCnds_kxtThto=" alt="Portugal renewable energy" class="object-cover bg-gray-100" style="aspect-ratio: 16/9;" data-mce-src="https://media.gettyimages.com/id/643477462/photo/renewable-energy.jpg?b=1&amp;s=2048x2048&amp;w=0&amp;k=20&amp;c=zG9vlwhaVfmwJL_QLbjS7V29ZgItNuMCnds_kxtThto=" data-mce-style="aspect-ratio: 16/9;"></figure>

Debunking Solar Myths: What You Need to Know About Solar Energy in Portugal

Sol Viva

Sol Viva helps international homeowners in Portugal  install solar panels with confidence, clarity, and zero hassle.

We specialise in guiding international homeowners through the entire solar journey—from energy analysis and system design to installation, registration, rebates, and long-term management. 
With 260–300 days of sunshine each year, Portugal and Spain are among Europe’s most profitable regions for residential solar power. Yet for international homeowners, navigating local installers, regulations, and language barriers can be overwhelming.

Sol Viva acts as your trusted solar partner, providing independent advice, expert project management, and access to vetted, reliable installers. We handle everything end-to-end so you get a high-performance solar system, the best price, and peace of mind. Whether you want to reduce electricity bills, increase energy independence, add battery storage, or maximise the ROI of your property, Sol Viva makes going solar in Portugal simple, transparent, and stress-free.

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