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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40W Solar Charger

Product ID: 312363607

Details

Brand
SinKeu
Efficiency
High
Item Weight
3.3 pounds
Material
Silicon
Product Dimensions
13.78"L x x

⚡22% high conversion efficiency

💧Water resistant for all-weather use

🔋40W max power output

€ 165.27

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Description

☀️ Charge smarter, roam freer — never miss a beat outdoors!

ULTRA COMPATIBLE - 10 DC adapters ensure seamless connection with most portable power stations
POWER UP ANYWHERE - 40W foldable solar panel delivers reliable energy on the go
TRIPLE PORT CHARGING - Simultaneously power your phone, laptop, and gadgets with DC, USB-C, and QC3.0 ports
LIGHTWEIGHT COMPACT - Weighs just 3.3 lbs and folds to a sleek 13.3 x 11 x 2 inches for effortless portability
SMART SAFE CHARGING - TIR-C tech optimizes charging speed while protecting devices from overload and overcharge

The SinKeu 40W Foldable Solar Panel is a high-efficiency, water-resistant charger designed for professionals on the move. Featuring 3 output ports and 10 DC adapters, it powers a wide range of devices including iPhones, iPads, laptops, and portable power stations. Its lightweight, compact foldable design and smart TIR-C technology make it the ultimate companion for camping, hiking, and remote work, ensuring you stay connected wherever your adventures take you.

Specifications

ASIN	B08S7B46CB
Amperage Capacity	2.27 A
Best Sellers Rank	#43,573 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #206 in Solar Panels
Brand	SinKeu
Brand Name	SinKeu
Connector Type	USB
Customer Reviews	4.4 out of 5 stars 864 Reviews
Efficiency	High Efficiency
Folded Size	13.3112in
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 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 See more
Item Dimensions L x W x H	13.78"L x 9.45"W x 1.97"H
Item Highlight	Portable Solar Panel Charger for Portable Power Station, Camping Solar Panels for Camping Outdoor Van RV Trip
Item Type Name	foldable solar panel
Item Weight	3.3 pounds
Manufacturer	SinKeu
Manufacturer Part Number	40W
Material	Monocrystalline Silicon
Material Type	Monocrystalline Silicon
Maximum Power	40 watts
Maximum Voltage	18 volts
Model Number	S40
Number of Items	1
Output Voltage	5 volts
Product Dimensions	13.78"L x 9.45"W x 1.97"H
Special Features	Water Resistant, Waterproof
UPC	616985224616
Unit Count	1 Count

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€ 165.27

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered 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 Slovakia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Sneha T.

Received my product in pristine condition. Great service overall.

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