SunJack 40 Watt Foldable Solar Panel - Compact Camping Power

In this review of the SunJack 40 Watt Foldable Solar Panel, the bottom line is simple: outdoor users who need a compact, durable charger for phones, small power stations and USB devices will appreciate this panel most. It stands out primarily for its rugged ETFE construction and IP67-rated ports, which make it one of the more weather-resistant portable solar panels available. The review focuses on real-world usability: foldable size for backpacking, integrated kickstands and carabiners for easy setup, and multiple outputs including a PD30W USB-C for faster device charging.

Key Features

• Rugged ETFE construction: The ETFE surface and waterproof casing provide long-term durability and better resistance to scuffs and outdoor wear compared with standard fabric panels.
• IP67-rated ports: Waterproof ports help keep connections protected in rain or dusty conditions, improving reliability on longer trips.
• Compact 4-panel fold: The collapsible four-panel design folds down to roughly the size of a tablet, making it easy to stow in most backpacks for day hikes and overnight trips.
• Multiple outputs: PD30W USB-C, QC3.0 USB-A and a DC output allow simultaneous charging of a phone, power bank and compatible power stations for flexible power management outdoors.
• Integrated kickstands and carabiners: Built-in kickstands and included carabiners simplify angling and hanging the panel to maximize sun exposure without extra accessories.
• Accessory kit included: The panel ships with adapter cables and a variety of DC plugs to connect to more devices right out of the box.

Who It's For

The SunJack 40W is aimed at campers, hikers and weekend adventurers who need a reliable, moderately powerful charger that fits in a pack and survives rough conditions. It is particularly well suited to users who want to top up phones, tablets and small power stations while maintaining portability and water resistance.

It is not intended for people who need high-capacity solar charging for large inverter generators or continuous off-grid home use; those users should look for larger wattage panels or fixed installations. Also, if maximum 60W+ USB-C PD speeds are required for laptops, consider a higher-output unit.

Pros & Cons

Pros

• Solid, weather-resistant build with ETFE and IP67 ports improves longevity in the field.
• Practical portability: four-panel fold and included carabiners make transport and mounting easy.
• Versatile charging: PD30W USB-C plus dual USB and DC output allow simultaneous charging of multiple devices.
• Comes with adapter cable set and DC plugs for broader device compatibility out of the box.

Cons

• At 40W total, the panel can feel underpowered for larger power stations or fast laptop charging.
• Power output varies with conditions, and some users report mixed results in low light despite good cell efficiency.

Specifications

Maximum power	40 watts
Cell type	ETFE monocrystalline cells
USB-C output	PD30W
USB-A output	QC3.0 dual ports
Waterproof rating	IP67-rated ports
Design	Foldable 4-panel with kickstands and carabiners
Included accessories	Adapter cable (DC5521 to DC5521/XT60/Anderson), 10 DC plugs, 2 carabiners

Our Verdict

The SunJack 40 Watt Foldable Solar Panel is a sensible choice for outdoor enthusiasts who prioritize durability, portability and versatile charging over raw wattage. It delivers dependable, weather-resistant performance for phones, tablets and small power stations, and the included adapters increase its out-of-the-box usefulness. For those who need more sustained high-power charging, a larger panel is a better fit, but for backpackers and campers this panel represents good value.

Frequently Asked Questions

Can this charge a phone and a power bank at the same time?
Yes, the panel supports simultaneous charging via PD30W USB-C, USB-A and the DC output thanks to its internal power-management circuitry.

Is it waterproof enough for rainy conditions?
The ports are IP67-rated and the casing is waterproof, which protects connections in rain and dusty conditions, though long-term submersion is not the intended use.

Does it include cables to connect to power stations?
Yes, the package includes an adapter cable (DC5521 to DC5521/XT60/Anderson) and 10 DC adapter plugs to fit a range of devices.