Bestbuy offers EcoFlow - Foldable 45W Solar Panel - Black for $59 (orig. $99) with free shipping.

Product Description:
Up to 25% conversion rate. Charge faster with an even smaller panel. With the introduction of TOPCon solar technology, a first in the mini portable solar panel industry, we've set a new standard for conversion efficiency, achieving 25%. This enables faster charging in a more compact form. Fully charge RIVER 2 in 7 hours during peak sunlight hours, and power your electronics and essential camping appliances for a longer adventure. 

• Ideal solar power source for RIVER 2 Series
  With it's compact design and lightweight, a 45W portable solar panel is the ideal companion for RIVER 2 Series power stations, providing a simple and convenient charging experience.
• More benefits of adopting TOPCon
  EcoFlow 45W Solar Panel with TOPCon vs traditional solar panel with PERC material.
• Extremely compact
  Easily fit into any compact space. With its folding four-panel structure, the portable solar panel significantly reduces in size when folded, allowing it to easily fit into compact spaces such as backpacks, SUVs, or minivans.
• IP68 waterproof rating
  With a high IP68 waterproof rating and a protective ETFE film, the solar cells continue to collect energy even during downpours.
• Eco-Friendly
  Utilizing renewable solar energy, this panel helps reduce your carbon footprint and reliance on conventional power sources.