6 Best Waterproof Solar Charger for Backpacking Trips

The BigBlue Solar Panel Charger is my top pick for most buyers seeking the best waterproof solar charger for backpacking. Its foldable panel design offers a useful balance of charging area, packability, and simple USB power access, so it fits many trail kits without adding a bulky battery pack.

This guide is for backpackers who need to keep phones, GPS units, cameras, or emergency lights running away from outlets. Focus on panel size, folded dimensions, connection options, and the materials used to protect the charger from rain and trail wear. Solar output also changes with cloud cover, shade, and panel angle, so expectations matter. The six picks below are ranked by practical use, with clear reasons and honest drawbacks for each. Use the list to match a charger to your route, weather, and gear.

Quick Comparison

6 Top Solar Chargers for Backpacking

These six backpacking solar chargers are ranked by waterproof protection, charging options, packability, and value, counting down to the top pick.

6. GEYOTO Solar Panel Charger

Best for: Day hikes and emergency charging

The GEYOTO 45W solar charger is a folding panel for phones, tablets, power banks, and other USB devices. It includes two USB-C ports and one USB-A port, with up to 25W PD charging through the main USB-C connection. The panel folds to 8.44 × 12.52 × 1.26 inches and weighs 1.65 pounds, making it manageable for a backpack or emergency kit. It costs around $60.

Its monocrystalline cells offer a stated maximum conversion efficiency of 25.4% in direct sunlight. A laminated surface provides IP68 water and dust resistance, but the charging ports still need to stay dry. The package includes a USB-C extension cable, storage pouch, two carabiners, and a manual. There is no built-in battery, so you must charge a device directly or pair the panel with a power bank for later use. GEYOTO also includes a two-year warranty. Output will change with clouds, shade, panel angle, and the device being charged, so the 45W rating is not a constant outdoor result.

Pros

• Three charging ports can power up to three USB devices at once.
• The 25W PD USB-C port supports faster charging for compatible phones, tablets, and power banks.
• Compact folded dimensions and included carabiners make backpack attachment simple.

Cons

• Solar output drops in cloudy weather, shade, or poor panel positioning.
• The panel stores no power, so charging stops when sunlight disappears unless you use a separate power bank.

Check Price on Amazon →

5. BigBlue 25W Portable Solar Panel Charger

Best for: Lightweight camping and emergency charging

This foldable 25W solar charger targets hikers, campers, and emergency-kit users who need USB power away from an outlet. Folded, it measures 4.65 by 6.42 by 1.38 inches and weighs 0.84 pounds, so it fits small packs without adding much bulk. Two included carabiners let you hang it from a backpack or tent.

Its main advantage is port flexibility. USB-A supplies up to 5V/2.4A, while USB-C supplies up to 5V/3A, and both can charge devices at once. BigBlue rates the N-type solar cells for up to 25.4% conversion efficiency. The ETFE surface, UV-resistant EVA, and solid baseplate add protection against outdoor wear. An IP68 rating helps with dust, splashes, spills, and light rain. The package includes a USB-C-to-USB-C cable and elastic strap. At around $70, it costs more than basic single-port panels.

Pros

• Folds to near iPad size and weighs under one pound.
• Charges two USB devices through USB-A and USB-C ports.
• Durable construction and IP68 protection suit outdoor storage and use.

Cons

• Output depends heavily on direct sunlight, clear placement, and changing weather.
• It stores no electricity, so you cannot charge devices after dark without a separate power bank.

Check Price on Amazon →

4. BigBlue 30W Solar Charger

Best for: Campers needing direct solar charging

BigBlue’s 30W folding solar charger provides power from sunlight without an internal battery. It has USB-A, USB-C, and DC outputs, so it can charge phones, tablets, flashlights, power banks, and compatible small power stations. The USB-C port supports PD up to 18W, while the DC output reaches 17.4V and 1.73A maximum. A USB-C to USB-C cable, two carabiners, and a manual come with the panel. At around $60, it costs more than a basic phone-only charger, but it supports more device types.

Folded, the charger measures 7.95 by 12.12 by 1.46 inches and weighs 1.85 pounds. That size fits many daypacks, though it is not pocket-sized. Monocrystalline cells can reach 24.7% conversion efficiency, with a PVDF surface and UV-resistant EVA lamination. The stated IP68 protection covers the panel against rain and splashes, but not the junction box. Output changes with cloud cover, heat, angle, and placement. This is a direct-use panel, not a battery, so it cannot store electricity after sunset.

Pros

• USB-A, USB-C, and DC outputs support phones, tablets, power banks, and compatible small power stations.
• The 18W USB-C PD port can provide faster charging for supported devices.
• Folding construction, two carabiners, and a 1.85-pound weight suit hiking and camping packs.

Cons

• It cannot store power, so charging depends on available sunlight and may fluctuate.
• The junction box is not waterproof, and the DC connector requires careful voltage compatibility checks.

Check Price on Amazon →

3. BLASOUL Solar Power Bank Portable Phone Charger

Best for: Camping kits and emergency car bags

The BLASOUL is a 49,800mAh portable battery with solar recharging, wireless charging, and four built-in cables. Three provide output for iOS, USB-C, and Micro USB devices, while the USB-A cable recharges the pack. Its lithium-polymer battery also supports charging through a wall adapter.

Wired output reaches 22.5W through PD 3.0 and QC 3.0, while the built-in USB-C cable can deliver up to 20W on its own. The maker says an iPhone 14 can reach 60% in 30 minutes under suitable conditions. Wireless charging reaches 15W for compatible phones. An IP65 rating helps protect against dust and water splashes, but this is not a submersible waterproof battery. The flashlight adds steady, SOS, and strobe modes for outages or nighttime tasks.

Pros

• Four attached cables reduce the need to pack separate charging leads.
• 49,800mAh capacity can recharge phones multiple times before the pack needs power.
• IP65 protection and a three-mode flashlight fit camping, hiking, and emergency use.

Cons

• Solar charging depends heavily on direct sunlight and will be much slower than wall charging.
• Built-in cables cannot be replaced if one frays, breaks, or stops working.

Check Price on Amazon →

2. BigBlue 14W Portable Solar Charger

Best for: Day hikes and emergency charging

The BigBlue 14W solar charger folds to about 5.98 by 6.34 by 1.38 inches, making it smaller than many tablets. At 0.75 pounds, it fits easily in a backpack or tote. Its fabric-covered panels include one USB-A port, rated for up to 5V and 2.4A. The package includes a USB-A to USB-C cable, two carabiners, and a user manual. It costs around $45.

BigBlue claims up to 25.4% solar conversion efficiency with its upgraded panel construction. Real output will vary with sunlight, temperature, panel angle, and cloud cover. The charger works best when fully unfolded and pointed directly at the sun. Its polymer surface handles occasional rain and wet fog, but the junction box is not waterproof. This is a direct-charge panel, not a power bank, so it cannot store energy for later use. A single USB-A connection also limits charging flexibility.

Pros

• Folds into a compact 5.98-by-6.34-inch package for hiking and travel.
• Weighs only 0.75 pounds, reducing backpack load.
• Includes two carabiners for attaching the panel to outdoor gear.

Cons

• No internal battery, so charging stops when sunlight weakens or disappears.
• One USB-A port does not support fast charging or simultaneous device charging.

Check Price on Amazon →

1. BigBlue Solar Panel Charger

Best for: Hikers carrying phones and GPS units

The BigBlue 28W foldable solar charger provides direct power for phones, GPS units, flashlights, and power banks. It has two USB-C ports and one USB-A port, with up to 5V/3A per port and 5V/4.8A combined. The panel folds to 11 x 6 x 1.4 inches and weighs 1.5 pounds, so it can fit in a small backpack. The package includes a 50cm USB-C cable and carabiners.

Its shadow-free front panel removes the usual metal lines across the cells. BigBlue claims this design gathers 20% more power, while N-type cells improve low-light performance and heat resistance. The panel converts up to 25.4% of sunlight and has an IP44-rated surface that resists rain, fog, and wear. It costs around $60. A blue LED shows when charging begins, but output changes with cloud cover, panel angle, temperature, and the connected device.

Pros

• Three charging ports support multiple devices at once.
• Compact folded size and carabiners suit hiking or emergency kits.
• IP44 panel surface handles light rain, fog, and outdoor wear.

Cons

• It has no battery, so devices must stay connected in direct sunlight.
• The USB junction box is not waterproof, and the output cannot charge laptops or large power stations.

Check Price on Amazon →

Buying Guide

The most important factor is usable charging output in weak sunlight. A waterproof panel that produces little power under clouds will not keep a phone or GPS running on a multi-day trip.

• Water resistance: Choose IPX6 for heavy rain, or IPX7 if the unit may fall into water. Keep ports covered when charging.
• Panel output: Look for 5 to 10 watts for phone charging. Larger 15 to 20-watt panels charge faster but usually weigh more.
• Battery capacity: A built-in 10,000mAh battery can provide roughly one to two phone charges. Choose 20,000mAh for two people or trips beyond three days.
• Pack weight and size: Stay near 1 to 1.5 pounds for backpacking. A folded panel around 6 by 10 inches packs more easily than a rigid board.
• Ports and safety: USB-C is preferable, with USB-A as a backup. Look for overcharge, short-circuit, and temperature protection. A 15 to 20-watt USB-C output supports many modern phones.

If you cannot have everything, prioritize panel output and battery capacity, then accept a slightly heavier pack.

Frequently Asked Questions

How do waterproof solar chargers work for backpacking?

Waterproof solar chargers use photovoltaic panels to convert sunlight into electricity for a phone, power bank, or small USB device. They work best in direct sun, while clouds, shade, and tree cover reduce output. Check the protection rating before buying. IPX4 resists splashes, while IP67 also handles temporary submersion under stated conditions.

What should I look for in a waterproof solar charger for hiking?

Look for a certified water-resistance rating, a usable USB output, low weight, and a separate power bank or battery pack. An IP67 rating offers more protection than IPX4, but the charger still needs sunlight and careful cable storage. For backpacking, compare folded size and weight, not panel area alone.

Can a solar phone charger keep a phone powered on a backpacking trip?

Yes, a solar charger can help keep a phone powered on a backpacking trip, but it should not be your only power source. Sunlight changes, and phone charging can stop under trees or clouds. A 10,000 mAh power bank gives you stored energy while the panel recharges it during daylight.

Are waterproof solar chargers reliable in cloudy weather?

Waterproof solar chargers are less reliable in cloudy weather because weak light produces less electricity. They may still add charge during bright overcast conditions, but direct sunlight works better. Plan around a separate battery, and treat the panel as a backup. Shade, rain, and short winter days can reduce output for hours.

Conclusion

The BigBlue Solar Panel Charger is the top pick for backpackers who want a portable panel for sunny trail days and backup power. If your priority is dependable charging after dark or through several cloudy days, choose a high-capacity power bank instead, since solar panels need usable sunlight. Before buying, double-check the panel’s packed size, device compatibility, included cables, quantity of panels, and current price. Solar charging can reduce outlet dependence, but it will not replace battery planning. Pack a charged battery for emergencies, protect electronics from rain, and place the panel in direct light during breaks. The right choice balances pack space, charging needs, and route conditions.