EnginStar Foldable 40W Solar Panel for Power Stations — 24% Efficiency, USB-C/A & 10-in-1 Adapter

EnginStar's 40W Foldable Solar Panel is a compact, high-conversion solar charger designed to recharge portable power stations and charge small electronics while you're off-grid.

Built for campers, emergency kits, and anyone needing reliable solar input for a power station, this foldable panel combines monocrystalline cells, multiple output ports, and broad adapter compatibility into a lightweight package. It delivers up to 40 watts of sunlight-to-electricity conversion with monocrystalline efficiency up to 24%, and includes a 10-in-1 adapter set so you can plug directly into most portable generators and solar-ready devices.

How does this panel connect to different power stations?

The EnginStar 40W ships with a DC 5521 cable and a 10-in-1 interchangeable adapter kit, letting you match the correct barrel or pin for many popular portable power stations. No separate converter is usually required—simply select the right adapter head and plug into your generator's solar input.

• Includes DC cord 5521 plus 10 changeable DC heads for broad compatibility
• Direct DC output supports 18V/2.27A max for compatible units
• Works with most solar-ready power stations and small solar generators

What devices can I charge directly from the panel?

This solar panel includes USB-A and USB-C ports for charging phones, tablets, power banks, and small USB accessories while sunlight is available. Each USB port supplies up to 18W with standard fast-charge voltage profiles, and a DC output handles larger loads when connected to a compatible power station.

• USB-A and USB-C each support up to 18W (5V/3A, 9V/2A, 12V/1.5A profiles)
• Ideal for phones, power banks, USB lights, fans, and small tablets
• Note: solar panels do not store energy—use directly or feed a battery/power station

How portable and durable is the foldable design?

Weighing about 3.3 lbs and folding to roughly 12.6 x 9.1 x 2 inches, the panel slips into backpacks or emergency kits without adding bulk. The foldable form factor protects the cells in transit and makes setup quick at campsite or roadside locations.

• Compact folded size for easy transport and storage
• Lightweight at approximately 3.3 lbs for backpacking or RV travel
• Durable hinges and a travel-friendly case reduce wear during use

What performance can I expect in real conditions?

Monocrystalline silicon cells give this panel higher conversion efficiency—up to 24% in ideal sun—so it produces more power per area than many comparable panels. Performance depends on direct sunlight and clear skies: shade, clouds, or poor tilt reduce output, and the unit includes an automatic restart feature after interruptions.

• High-efficiency monocrystalline cells for stronger output per panel area
• Maximum 40W output under optimal conditions, reduced in cloudy/obstructed light
• Automatic restart helps recovery after brief shading or reconnection

Who is this for? The EnginStar 40W Foldable Solar Panel is made for weekend campers, RV owners, remote workers, and anyone who needs a lightweight solar input to keep portable power stations topped up or charge small electronics from sunlight. It’s also a practical addition to emergency kits and car trunks for reliable, green power when grid charging isn’t available.