{"product_id":"marbero-21w-foldable-portable-solar-panel-charger-23-monocrystalline-ip65-waterproof-usb-18v-dc","title":"MARBERO 21W Foldable Portable Solar Panel Charger — 23% Monocrystalline, IP65 Waterproof, USB \u0026 18V DC","description":"\u003cp\u003e\u003cstrong\u003eMARBERO's 21W foldable solar panel is a compact, high-efficiency portable charger that converts sunlight into USB\/DC power for phones, tablets and small devices while you’re off-grid.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for campers, hikers and travelers who need dependable on-the-go energy, the MARBERO SL21W pairs monocrystalline cells (23% conversion) with an IP65 rugged fabric shell and a slim, pocketable folded profile. It unfolds to a 26.8\" x 11.4\" array that produces up to 18–21W in direct sun and still generates useful power on cloudy days. The integrated power box supplies USB-A outputs and an 18V DC port for direct device charging; note this panel does not store electricity and is not intended to recharge large power stations or most laptops.\u003c\/p\u003e\n\n\u003ch3\u003eHow fast will the MARBERO 21W charge my phone or tablet?\u003c\/h3\u003e\n\u003cp\u003eCharging speed depends on sunlight, device demand and the panel’s built-in smart chip which optimizes current. In strong sunlight you can expect near-maximum output (18–21W) and the USB ports deliver up to 2.4A to compatible devices for efficient charging.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePeak conversion: 23% monocrystalline cell efficiency\u003c\/li\u003e\n  \u003cli\u003eUSB-A output: 5V \/ 2.4A per port for phones and most tablets\u003c\/li\u003e\n  \u003cli\u003eDC output: 18V \/ 1.1A for devices with compatible input\u003c\/li\u003e\n  \u003cli\u003eSmart chip protects against overcharge and overcurrent\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it work when it's cloudy or not pointed directly at the sun?\u003c\/h3\u003e\n\u003cp\u003eYes — the SL21W retains useful output under diffuse light. While full sun and a 35–65° tilt yield the highest wattage, the panel still produces meaningful power on overcast days so you can top-up batteries and operate small electronics.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFull sun: approximately 18–21W practical output\u003c\/li\u003e\n  \u003cli\u003eCloudy\/overcast: about 12–16W typical output\u003c\/li\u003e\n  \u003cli\u003eOptimal tilt improves harvest; angle affects real-world performance\u003c\/li\u003e\n  \u003cli\u003eOperational range: -10 to 70°C (14–158°F) for outdoor use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow portable and durable is the MARBERO foldable charger?\u003c\/h3\u003e\n\u003cp\u003eThe panel folds to a compact 6.3\" x 11.4\" x 1.4\" and weighs only 1.32 lbs, making it smaller and lighter than many tablets and easy to stow in backpacks. It uses hard-wearing Oxford fabric and IP65-rated construction for splash and dust resistance so it stands up to camping and travel conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFolded size: 6.3\" x 11.4\" x 1.4\"; unfolded: 26.8\" x 11.4\" x 1.4\"\u003c\/li\u003e\n  \u003cli\u003eWeight: 1.32 lbs for lightweight carry\u003c\/li\u003e\n  \u003cli\u003eIP65 waterproofing and rugged Oxford cloth exterior\u003c\/li\u003e\n  \u003cli\u003eFour attachment holes and included carabiners for easy mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat devices are compatible and what should I avoid?\u003c\/h3\u003e\n\u003cp\u003eThe MARBERO 21W is ideal for charging phones, tablets, power banks, speakers and similarly sized gadgets through its USB ports and DC output. It cannot store power onboard — you must plug devices in while the panel is producing energy — and it’s not designed to recharge large power stations or most laptops directly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorks best with smartphones, tablets, portable power banks and small DC devices\u003c\/li\u003e\n  \u003cli\u003eIncludes DC 5521 cable plus three interchangeable DC adapters\u003c\/li\u003e\n  \u003cli\u003eDoes not include internal battery storage or charge large power stations\u003c\/li\u003e\n  \u003cli\u003eAvoid using behind glass or inside vehicles — sunlight loss reduces output\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The MARBERO 21W foldable solar panel is built for outdoor enthusiasts, weekend campers, long-distance travelers and anyone who needs a light, rugged way to top up devices off-grid. It’s especially useful for day hikes, car camping, remote work days without mains power, and emergency backup when portable, direct-sun charging is required. Backed by a 12-month warranty and 24\/7 customer support, it’s a practical choice when you want reliable, portable solar power without the bulk of larger panels.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the MARBERO 21W charge a power station or laptop?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No, this panel does not store electricity and is not intended to recharge large power stations or most laptops directly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How should I position the panel for best output?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Tilt the panel toward the sun at about 35–65° and avoid shading; full sun gives the highest output, cloudy conditions reduce but still yield power.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MARBERO","offers":[{"title":"Default Title","offer_id":56831396839764,"sku":"B0CFF315PD","price":49.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/marbero-front-folded-panel.jpg?v=1787015363","url":"https:\/\/gardenluxe.co.uk\/products\/marbero-21w-foldable-portable-solar-panel-charger-23-monocrystalline-ip65-waterproof-usb-18v-dc","provider":"Gardenluxe Uk","version":"1.0","type":"link"}