Renogy E.FLEX 21 Solar Charger (R21EF-G1) - 21 Watts

Model Number: R21EF-G1
Web Code: 13807035


Harness the power of the sun to charge your devices with the Renogy E.FLEX 21 solar charger. It uses advanced iSolar technology with an energy conversion efficiency of up to 22%-25% to maximize charging speeds while protecting your devices from overheating. Its portable size and durable nylon construction makes it rugged enough to take anywhere.
Sold and shipped by Best Buy
Available online
Reserve & Pick Up

This product is currently unavailable for Reserve & Pick Up at nearby stores.

  • iSolar technology delivers the fastest charging speeds possible while protecting your device from overheating
  • Energy conversion efficiency of up to 22%-25% transforms sunlight into 21 watts of usable electric current
  • Auto-optimization function immediately reconnects when sunlight returns after a charging interruption
  • Two USB ports make it easy to connect with your smart phone, tablet, camera, and other devices
  • Engineered with water-resistant nylon for long-lasting durability in any conditions
  • Foldable design is completely portable and features two adjustable kickstands
Charger Type
Specific Device Compatibility
Smart Phone; Tablet; Action Camera
Output Ports/Connectors
2 x USB Ports
Power Source
21W Solar Panel
Total Cable Length
0.6 m


Works with Google Assistant
Works with Nest
15.8 cm
29 cm
2.8 cm
540 g
Width (Inches)
6.22 in
Height (Inches)
11.42 in
Depth (Inches)
1.1 in
  • Renogy E.FLEX 21 Portable Solar Panel
  • 2 x Micro-USB Cable
  • 2 x Carabiner
  • User Guide

    See helpful questions and answers from shoppers like you.

    Check our return policy and you'll find specific return information for your product and steps on how to return in-store or by mail.