Description

Price: $39.99
(as of Mar 10, 2025 20:57:57 UTC – Details)

Product Description

First, place the solar panels in direct sunlight (full expansion required). For windows: Hang outdoors (never behind glass – blocks 25% sunlight!).

Then, connect your device (phone, power bank) to the USB port of the solar charger at the same time. Charging starts instantly – no buttons!

We have increased the thickness of the baseplate to enhance protection against shocks and falls, thereby extending the solar charger’s lifespan

Monocrystalline TOPCon wafers reduce solar panel thickness by 22% (from 35mm to 27mm) while maintaining rigidity.

Portable Solar Panel Benefits of TOPCon Solar Cells

Higher Energy Efficiency in Real Conditions

TOPCon cells achieve 24%+ conversion efficiency—superior to conventional PERC cells (20-22%)—generating 18% more power during hiking trips under partial shade or cloudy skies.

Lower Heat Degradation

With a -0.29%/°C temperature coefficient (vs. PERC’s -0.35%/°C), these solar panels maintain charging stability at 95°F desert heat, proven in Arizona field tests.

Extended Lifespan for Harsh Environments

Anti-LID (Light-Induced Degradation) technology ensures better durability with <5% efficiency drop—BigBlue portable solar panels ideal for coastal areas and mountain expeditions.

Premium Low-Light Performance

Delivers 75W/m² output at dawn/dusk (vs. 55W/m² for PERC),

Note: the real output current of the solar panels is affected by many factors, such as sunlight intensity & solar irradiance, temperature effects, panel tilt & orientation, shading & obstructions, dirt & maintenance etc.

0ur data is under standard test conditions (1,000 W/m², 25°C, AM1.5 spectrum)

BigBlue small solar panel charger

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Customer Reviews

4.3 out of 5 stars 277

3.9 out of 5 stars 24

4.3 out of 5 stars 1,776

4.4 out of 5 stars 8,938

4.4 out of 5 stars 8,938

Price

$39.99$39.99

$59.49$59.49

$59.49$59.49

$67.49$67.49

$76.49$76.49

Conversion Efficiency

24.7%

25.4%

25.4%

25.4%

24.7%

Solar Cell Type

TOPCon cell

BC Cell

BC Cell

BC Cell

TOPCon cell

Output Ports

USB-A+USB-C

USB-A+USB-C

2* USB-A

2* USB-A

USB-A+USB-C+DC

Max. Output Power

5V/3A each, 5V/4.2A overall

5V/2.4A each, 5V/4A overall

5V/2.4A each, 5V/4A overall

5V/2.4A each, 5V/4.8A overall

PD 25W USB-C;17.4V/1.73A DC

Waterproof Level

IP68

IP68

IPX4

IPX4

IP68

Folding Size

8.1×8.82×1.02 in.

4.65×6.42×1.38 in.

11.1x 6.3x 1.3 in.

11x6x1.4 in

7.95×12.12×1.46 in.

Expandable Size

24.53×8.82×0.71 in.

18.11×12.83×0.2 in.

33.1x 11.1x 0.2 in.

32.9x11x0.2 in

24.53×12.12×0.2 in.

Net Weight

1.32lbs

1.01lbs

1.5 lbs

1.5 lbs

1.76 lbs

FAST AND SAFE CHARGING: Dual USB ports (each 5V/3A max, combined 5V/4.2A max) efficiently power most 5V electronic devices, including iPhones, Android phones, tablets, power banks, GPS, etc, when all portable solar panels are exposed to sufficient sunlight. Intelligent IC chip safeguards against overcurrent and short circuits, ensuring reliable and smart charging
ULTRA-PORTABLE CAMPING SOLUTION: BigBlue 21W solar charger is designed for ultimate portability, folding down to the size of a book and weighing just 1.32 lbs, making it easy to pack and carry wherever you go. The included hooks allow you to effortlessly attach it to your backpack or tent (Please orient the small solar panels toward the sunlight), making it an essential companion for hiking, road trip or emergency preparedness
ENHANCED DURABILITY AND WEATHER RESISTANCE: BigBlue solar panel charger features PVDF surface that provides exceptional durability, offering superior resistance to environmental elements, corrosion, and fire, while delivering twice the lifespan of conventional PET solar panels. Its IP68 waterproof rating ensures protection against occasional rain and unexpected weather (The USB junction box is not waterproof)
HIGHER EFFICIENCY CONVERSION: BigBlue 21W solar phone charger features high-quality monocrystalline panels, boosting solar conversion efficiency by up to 24.7%. With a light transmittance of up to 95%, this portable solar charger ensure excellent quality and high performance. Note: The foldable solar panel does not store electricity
WHAT’S INCLUDED AND CAUTION: You’ll receive 1PCS 21W Foldable Solar Panel, 1 USB-C to USB-C cable, 2 Carabiners and 1 User Manual. Please note that the actual power output greatly depends on weather conditions, angle to the sun, temperature, the type of device they’re plugged into, etc.