Power / Power Banks
User Manual for Sandberg Solar 6-Panel Powerbank 20000
Quick guide and technical specifications for the Sandberg Solar 6-Panel Powerbank 20000 (420-73). Learn about charging times, port outputs, and usage instructions for this 20000 mAh portable charger.
Quick answers from the manual
Quick answer
- The Sandberg Solar 6-Panel Powerbank 20000 (420-73) is a portable charger with 20000 mAh capacity, 6 foldable solar panels, and 20W USB-C PD fast charging. It supports power-through charging and is IPX4 water-resistant. p. 1, 2
Key actions
- Charge the powerbank via solar p. 1
- Charge devices using the powerbank p. 1
Technical specifications
| Parameter | Value | Meaning | Pages |
|---|---|---|---|
| Capacity | 20000 mAh / 74 Wh | Total energy storage | p. 2 |
| USB-C Output | 20W max | Fast charging output | p. 2 |
| Charging time (Sun) | 12 hours | Time to charge via solar panels | p. 2 |
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Where to find it in the PDF
- Product Overview p. 1
- Specifications p. 2
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
The Sandberg Solar 6-Panel Powerbank 20000 is a high-capacity portable charger designed for outdoor use. It features 6 foldable solar panels for off-grid charging and supports fast charging via USB-C PD. To use, simply connect your device to one of the available USB-A or USB-C ports. For solar charging, unfold the panels and expose them to direct sunlight. The device includes a snap hook for attaching to backpacks or tents.
Product description
This powerbank provides 20000 mAh of capacity, sufficient for approximately 8 smartphone charges. It is built with a durable, water-resistant (IPX4) design and includes a built-in flashlight. The solar panel array is detachable and foldable, making it a versatile solution for hiking, camping, and travel.
Charging and usage
The powerbank can be charged via the solar panels or a standard USB power source. Note that solar charging is intended as a supplementary power source and requires direct sunlight. The device supports power-through charging, allowing you to charge your devices while the powerbank itself is being charged.
- USB-C Input: Supports up to 18W max.
- USB-C Output: Supports up to 20W PD fast charging.
- USB-A Outputs: Two ports available, supporting up to 18W max.
Maintenance and safety
To ensure longevity, keep the powerbank within the specified operating temperature ranges. Charging should occur between 0°C and 45°C, while discharging is safe between -20°C and 45°C. Avoid exposing the unit to extreme heat or submerging it in water, despite its IPX4 water-resistant rating.
Manufacturer information
Sandberg A/S
Practical help
Common problems
Slow charging via solar
Ensure the solar panels are fully unfolded and exposed to direct sunlight. Charging time by sun is approximately 12 hours under optimal conditions.
Device not charging
Check if the powerbank has sufficient charge. Ensure the cable is securely connected to the correct output port (USB-A or USB-C) and that the device is compatible with the output voltage.
Before use
- Unfold all 6 solar panels for maximum efficiency.
- Charge the powerbank fully via USB before first use.
- Ensure the device is within the operating temperature range (0-45°C for charging).
- Check that the USB cable is compatible with your device.
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Specs in practice
- Power-through
- Allows the powerbank to charge devices while it is being charged itself.
Images and diagrams
- The powerbank features 6 foldable solar panels.
- Includes 2x USB-A output ports and 1x USB-C PD 20W port.
- Includes a snap hook for hanging on backpacks or tents.
Model compatibility
- Compatible with most USB-powered devices.
- Supports USB-C PD 20W fast charging.
Manual page author
David Miller
Documentation analyst