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 | Portable Solar Panel Charger for iPhone, iPad, Laptop, Camping Solar Panels for Camping Outdoor Van RV Trip

Product ID: 390542932

Details

Brand
SinKeu
Efficiency
High
Item weight
1.5 kg
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)

841 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Description

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

FAST SMART CHARGING - Dual output ports with QC3.0 and TIR-C tech optimize charging speed while protecting your devices.
COMPACT TRAVEL READY - Lightweight 4.2lb foldable design with kickstand fits effortlessly into your outdoor gear.
WEATHERPROOF DURABLE - Water-resistant panel and rugged polyester pouch keep you powered rain or shine.
UNIVERSAL COMPATIBILITY - Includes 10-in-1 connectors to charge phones, laptops, tablets, and even mini fridges seamlessly.
POWER UP ANYWHERE ANYTIME - 40W foldable solar panel delivers reliable energy on the go, perfect for your mobile lifestyle.

The SinKeu 40W foldable solar charger features a high-efficiency 22% monocrystalline panel with dual output ports (15V DC and USB QC3.0) for versatile device compatibility. Weighing just 4.2 lbs and designed with a kickstand, it’s ideal for outdoor professionals and travelers seeking reliable, weather-resistant solar power on the move. Comes with a 10-in-1 connector kit and backed by 24/7 support and a 12-month warranty.

Specifications

ASIN	B08S7B46CB
Amperage Capacity	2.6 Amps
Best Sellers Rank	#13,556 in Mobile Phones & Communication Products ( See Top 100 in Mobile Phones & Communication Products ) #27 in Mobile Phone Solar Chargers
Brand	SinKeu
Brand Name	SinKeu
Connector Type	DC-to-DC Cable, USB
Customer Reviews	4.5 out of 5 stars 1,002 Reviews
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
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	33.8L x 27.9W x 5.1H centimeters
Item Type Name	Solar Panel
Item Weight	3.3 Pounds
Item weight	3.3 Pounds
Manufacturer	SinKeu
Manufacturer Part Number	40W
Material	Monocrystalline Silicon
Material Type	Monocrystalline Silicon
Maximum Power	40 Watts
Maximum Voltage	15 Volts
Model Number	S40
Output Voltage	5 Volts
Product dimensions	33.8L x 27.9W x 5.1H centimeters
Special Features	Water Resistant, Waterproof
UPC	616985224616
Unit Count	1.0 Count

Reviews

S**.

Exceptional Performance and Convenience for All Your Outdoor Power Needs!

8.08.2024

N**E

Works great!

15.06.2024

Y**L

Clean and portable energy anywhere

20.03.2026

P**R

Heavy compared to others, but that’s a good thing, but needs extra buckboost or jackery

2.07.2022

S**.

Provides peace of electrical means on trips

13.08.2025

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841 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered 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 Romania.

Secure transaction

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