Why the 40 watt solar panel can not produce desired power when charging my batteries?

This is normal, the solar panel works fine if it could produce an output power. Actually 40W is the max power of the solar chips, and 40W is a tested result in a laboratory with very strong light. The small solar panels are affected by many factors

Is the solar charger panel compatible with all power stations?

The solar panel comes with 10 DC adapters and is compatible with most portable power stations/solar generators on the market. However, I would recommend checking the input voltage range of your device to ensure it matches the 18V output solar panel.

It is recommended to charge how many watts of portable power staion?

Because the DC output is 18V/2.27A, the higher the wattage of your solar generator, the longer the charging time will be. For example: 300W=300/(18*2.27)=7 hours approx.

Can it charge multiple devices at once?

Yes, the 40W solar panel can charge multiple devices simultaneously. It has 3 output ports - 1 DC output, 1 USB-C output, and 1 USB QC3.0 output - that allow charging of different devices like phones, laptops, power banks etc. at the same time.

What's in the package?

‎40W Foldable Solar Panel x 1, 10-in-1 Connector x 1, DC-to-DC Cable x 1, User Manual x 1

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☀️ Harness the sun’s power—stay charged, stay unstoppable!

FAST SMART CHARGING - QC3.0 USB and DC output with TIR-C tech optimize charging speed while safeguarding your devices from overload.
COMPACT WEATHER READY - Lightweight 1.9kg foldable design with water-resistant build keeps you powered through unpredictable conditions.
PEACE OF MIND GUARANTEE - Backed by 12-month warranty and 24/7 customer support, ensuring your solar investment stays worry-free.
UNIVERSAL COMPATIBILITY - Includes 10-in-1 connectors to seamlessly charge phones, laptops, tablets, and even mini fridges—ditch the wall outlet.
POWER UP ANYWHERE ANYTIME - 40W foldable solar panel delivers reliable energy on the go, perfect for outdoor pros and urban explorers alike.

The SinKeu 40W foldable solar charger features a high-efficiency 22% monocrystalline panel with dual output ports (DC 15V/2.6A and USB QC3.0) for versatile device charging. Weighing just 1.9kg and water-resistant, it’s designed for portability and durability, compatible with most power stations and equipped with 10 connectors for broad device support. Ideal for professionals and adventurers seeking eco-friendly, reliable power off-grid.

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Manufacturer	SinKeu
Part number	40W
Item Weight	1.5 Kilograms
Product Dimensions	35 x 24 x 5 cm; 1.5 kg
Item model number	S40
Size	40W
Style	Usb
Material	Monocrystalline Silicon
Power source type	Corded Electric
Wattage	40 watts
Amperage Capacity	2.6 Amps
Maximum Power	40 Watts
Item Package Quantity	1
Folded size	33,8 x 27,9 x 5,1 cm
Special Features	Water Resistant, Waterproof
Included components	40W Foldable Solar Panel x 1, 10-in-1 Connector x 1, DC-to-DC Cable x 1, User Manual x 1, Package Box x 1
Batteries Included?	No
Batteries Required?	No

SinKeu40W solar charger panel for phone, laptop

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