BigBlue 28W Solar Panel Charger B401D
- 28 W folding solar panel charger
- USB-C and USB-A outputs
- 5 V output, up to 3 A
- 671 g with foldable panels
- Monocrystalline silicon cells
- Waterproof solar panels, direct sunlight needed
Updated 23 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A folding solar charger for camping and backpacking with both USB-C and USB-A outputs. It only delivers power when the panels face the sun, and the warranty line in the listing reads no.
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ASIN: B01EXWCPLCModel: B401D
Overview
BigBlue builds this folding solar charger around monocrystalline silicon panels that unfold in direct sunlight and send power to phones and other USB devices. A Smart IC circuit manages the charging, and the panels are described as waterproof.
Foldable panels and two output types cover phones, power banks, headphones and GPS units on the trail. Charging depends on sun, so cloud or shade cuts what reaches the device. The port count is worded inconsistently in the listing, so confirm it before planning to charge two devices at once.
Who it's for
Hikers and campers who spend long days outdoors and can leave the panels unfolded in direct sun. Those charging mostly indoors, or anyone needing a fast charge on a schedule, are better served by a wall charger or power bank.
Pros and cons
- Folding, portable panel design
- USB-C and USB-A outputs
- Monocrystalline silicon cells
- Waterproof solar panels
- Needs direct sunlight to charge
- Warranty line reads no
- Port count worded inconsistently
- No wall plug, solar only
Performance notes
Output follows the sunlight that hits the panels: unfolded and angled toward the sun, they send power through the smart IC to the connected device. Monocrystalline silicon is chosen for higher energy conversion, and the stated voltage and current cap what a device can draw. Cloud, shade and panel angle all reduce the result.
Specifications
| Brand | BigBlue |
|---|---|
| Model | B401D |
| Dimensions & fit | |
| Item Weight | 671 g |
| Capacity & performance | |
| Output Current | 3 A |
| Output Voltage | 5 volts |
| Power & efficiency | |
| Amperage | 2.4 A |
| Main Power Connector Type | 2 Pin |
| Power Plug | No Plug |
| Power Source | Solar Powered |
| Wattage | 28 watts |
| Construction & materials | |
| Color | Black |
| Enclosure Material | Monocrystalline Silicon |
| Compatibility & installation | |
| Compatible Phone Models | HTC/Google/Honor/iPhone/Huawei/LG/Motorola/Nokia/Samsung/Sony cellphones |
| Mounting Type | Unfold all the solar panels and connect to your devices in direct sunlight |
| Included components | |
| Customer Package Type | Frustration-Free Package (FFP) |
| Unit Count | 1 Count |
| Other details | |
| BuiltIn Media | 28W Solar Panel Charger*1, User Manual |
| Connector Type | USB Type A, USB Type C |
| Current | DC |
| Form Factor | Folding |
| Mfr Part Number | BB 401 |
| Plug Type | USB-C and USB-A |
Frequently asked questions
How do I use the BigBlue 28W solar charger?
The listing says to unfold all the solar panels and connect devices in direct sunlight. It gives no cleaning or storage guidance, though the panels are described as waterproof.
Is the BigBlue B401D a power bank?
No. It is a solar panel charger that sends power to connected devices. A power bank appears among the compatible devices, so it can be charged by this panel, but the panel does not store energy itself.
How many ports does the BigBlue B401D have?
Total USB ports are listed as 2, with connector types of USB Type A and USB Type C. One feature line words it as 2 USB-C and USB-A, so confirm the exact layout on the product images.
Does the BigBlue charger have a battery inside?
The listing does not mention a built-in battery. It describes a solar panel charger that sends power to connected devices.