MARBERO 21W Portable Foldable Solar Panel Charger — IP65 Waterproof, 23% Efficiency, 18V DC Output

Power on the go with MARBERO 21W Foldable Solar Panel

Meet a compact, weather-ready solar charger designed for outdoor adventures. The MARBERO 21W folds neatly into a slim package: folded at 11.4 inches by 6.3 inches and weighing about 1.32 pounds. Built with rugged Oxford cloth and a waterproof fabric layer, it stands up to sun, wind, and occasional splashes, making it a reliable companion for camping, hiking, or travel.

When sunlight hits the high-efficiency cells, the panel converts sun into usable power with up to 23% conversion rate. A smart charging chip analyzes your device and adjusts output to optimize speed while protecting against overcharging and overloading. In direct sun you may see outputs near 18–21 watts, while on cloudy days the panel still delivers 12–16 watts, helping you stay connected even when the sky isn’t perfectly clear.

Designed for versatile outdoors use

Designed for real-world outdoor use, the MARBERO 21W is built from durable monocrystalline silicon cells and a weather-ready shell. IP65 waterproofing shields the panel from dust and water jets, and its temperature tolerance spans -10 to 70 degrees Celsius, supporting a wide range of environments from chilly mornings to warm afternoons.

The charger includes convenient USB A and DC outputs, so you can power a smartphone, tablet, speaker, power bank, or other small devices. The USB A port delivers 5V at up to 2.4A, while the DC output offers 18V for devices that need a steady battery-boosting current. A built-in smart chip ensures safe, efficient charging for most day-use electronics, whether you’re in a desert campsite or a lakeside RV park.

Mounting, portability, and setup

Setup is straightforward thanks to four attachment holes and the included carabiners. The foldable design makes it easy to stow in a backpack or car trunk, and the embedded power box houses the ports for quick access. The kit typically includes the DC 5521 cable, interchangeable adapters, a user manual, and two carabiners to secure the panel to a bag, tent peg, or hiking pole.

• Portable, foldable design for travel and outdoor use
• Up to 23% conversion with smart charging for safe, efficient power
• IP65 waterproof rating and wide temperature tolerance for rugged conditions
• USB A and DC outputs enable charging of multiple devices on the go

• Includes adapters and carabiners for flexible mounting
• 12-month warranty and 7x24 customer support available
• Compact, lightweight choice for camping, hiking, or emergencies

Note: Output varies with sunlight intensity, angle, and weather. Clouds, shade, or incorrect tilt can reduce peak power.