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SOECOPO | Focus on outdoor solar solutions, making energy more free.
SOECOPO 20W Portable Solar Panel Charger
Product Specifications
Brand: SOECOPO
Peak Power: 20W (Max)
Solar Cell Type: Monocrystalline Silicon
Surface Material: High-Performance ETFE Film
Output Port: USB 2.0 (5V)
Output Current: 0.4A
Dimensions: 215mm x 185mm (8.46 x 7.28 inch)
Weight: 152g (5.36 oz)
What's in the Box?
1 x 20W Solar Charging Panel
1 x Premium 3-in-1 Charging Cable (Lightning / Type-C / Micro USB)
Key Features
High-Efficiency Monocrystalline & ETFE: Built with high-grade monocrystalline cells and coated with premium ETFE film for superior light transmission, scratch resistance, and long-term durability.
Ultra-Light & Compact: Weighing only 5.36oz (152g), it’s incredibly thin and portable. The built-in carabiner holes allow you to clip it to your backpack for "on-the-go" charging.
IP67 Waterproof Rating: Designed for the elements. Whether it's sudden rain or ocean spray, the rugged IP67 design ensures your power stays on.
Stable 5V USB Output: Integrated smart voltage regulator ensures a consistent current to protect your devices from over-current or surges.
IMPORTANT
Must-Read Before Use
To ensure the best performance and avoid misunderstandings, please note the following:
NO INDOOR USE: Solar panels require direct sunlight (UV spectrum) to generate power. Indoor LED lights, lamps, or flashlights DO NOT provide enough energy to charge your devices.
DO NOT CHARGE THROUGH GLASS: Placing the panel behind a window significantly reduces efficiency (by 50% or more) as glass reflects and filters the light needed for charging. Always use it outdoors.
ABOUT THE 20W RATING: 20W is the peak theoretical power under Standard Test Conditions (STC). Real-world output depends on sunlight intensity, angle, cloud cover, and temperature. Performance is highest when facing the sun directly at noon.
NO BUILT-IN BATTERY: This is a charger, not a power bank. It does not store energy. It converts sunlight into electricity in real-time.
Frequently Asked Questions
1.Why does the solar panel charge intermittently?
A: Solar panels consist of numerous small photovoltaic cells connected in series and parallel. If the panel is partially shaded during use, it cannot form a complete circuit internally. This impairs the panel's power generation efficiency and may even cause it to cease functioning.
The same principle applies to snow, dirt, dust, or grime—all of which can affect the panel's performance.
2.Can it charge on cloudy or rainy days?
A: Power generation on cloudy days is approximately 10-20% of sunny days. We recommend pairing it with a power bank or storage battery. Output approaches zero during heavy rain.
3.Buyers report insufficient power after testing solar panel parameters with test equipment?
A: The buyer's device plugs directly into the solar panel's USB port. Since the USB port is regulated (typically 5V 2A), the maximum power measured via USB is theoretically only 10W. This testing method is inaccurate.
Additionally, solar panel output power is affected by sunlight intensity, angle of incidence, and duration of exposure. Any obstruction on the panel surface will significantly reduce conversion efficiency and output.
4.Why did I not get 50w in the actual test of the 10w solar panel I purchased?
A: The maximum power of this solar panel is 20w, the maximum is obtained in the laboratory.Due to geographical constraints, most areas cannot get the maximum power of 50w.
So how do you test the maximum power of a solar panel in your-self area?Wait for a sunny day, flatten the solar panels on the ground at 12 noon. Use a multimeter to test the metal sheets in the solar panel junction box.

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