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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SinKeu 40W solar charger panel for phone, laptop

Product ID: 390542932

Details

Brand
SinKeu
Efficiency
High
Item weight
3.3 Pounds
Material
Silicon
Product dimensions
33.8L x 27.9W

⚡40W max power output

🔋22% high solar conversion efficiency

🔌Dual output ports (DC & USB QC3.0)

€ 214.46

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Description

☀️ Harness the sun, power your hustle—anywhere, anytime!

POWER UP ANYWHERE - 40W foldable solar panel delivers reliable energy for phones, laptops, and more—ditch the wall outlet.
SMART DUAL CHARGING - Equipped with DC and USB QC3.0 ports featuring TIR-C tech for ultra-fast, device-safe charging.
PEACE OF MIND GUARANTEE - Backed by 12-month warranty and 24/7 customer support—stay charged, stress-free.
UNIVERSAL COMPATIBILITY - Includes 10-in-1 connectors to seamlessly power most portable power stations and solar generators.
COMPACT READY FOR ADVENTURE - Lightweight (1.9kg) foldable design with kickstand and water resistance—perfect for camping or remote work.

The SinKeu 40W foldable solar charger panel features a high-efficiency 22% monocrystalline silicon design, dual output ports (DC 15V/2.6A and USB QC3.0), and a lightweight, water-resistant foldable form factor. Compatible with most portable power stations and equipped with 10 versatile connectors, it’s engineered for fast, safe charging of phones, laptops, and other devices during outdoor adventures or power outages.

Specifications

ASIN	B08S7B46CB
ASIN	B08S7B46CB
Amperage Capacity	2.6 Amps
Best Sellers Rank	#34,285 in Mobile Phones & Communication Products ( See Top 100 in Mobile Phones & Communication Products ) #59 in Mobile Phone Solar Chargers
Brand Name	SinKeu
Connector Type	DC-to-DC Cable, USB
Customer Reviews	4.5 4.5 out of 5 stars (825)
Customer reviews	4.5 4.5 out of 5 stars (825)
Date First Available	6 January 2021
Efficiency	High Efficiency
Folded Size	33,8 x 27,9 x 5,1 cm
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
Item Dimensions L x W x H	33.8L x 27.9W x 5.1H centimeters
Item Highlight	Portable Solar Panel Charger for Portable Power Station, Camping Solar Panels for Camping Outdoor Van RV Trip
Item Type Name	Solar Panel
Item Weight	3.3 Pounds
Item model number	S40
Manufacturer	SinKeu
Manufacturer	SinKeu
Manufacturer Part Number	40W
Material Type	Monocrystalline Silicon
Maximum Power	40 Watts
Maximum Voltage	15 Volts
Model Number	S40
Number of Items	1
Number of Packs	1
Output Voltage	5 Volts
Product Dimensions	33.78 x 27.94 x 5.08 cm; 1.5 kg
Special Features	Water Resistant, Waterproof
UPC	616985224616
Unit Count	1.0 Count

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€ 214.46

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cyprus.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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