SolarPanel & On-Board Battery 10+

BioLite SolarPanel 10+ — off-grid backup charging that fits flat in your pack

The gist: A slim, foldable 10-watt solar panel with a built-in battery, best for van life, overlanding, or multi-day treks where wall outlets aren't guaranteed.

• Integrated 3,200mAh battery: Store solar energy for later or charge devices directly — useful for topping up overnight from a day's sun exposure.
• Optimal Sun System: A built-in sundial helps you angle the panel for direct rays, and a 360° kickstand keeps it stable on uneven campsite ground.
• Genuinely packable: At about 19 oz and just under an inch thick, it folds flat enough to slide into a backpack's back panel like a notebook.
• 10W usable output: Enough for phone and small-device charging, not laptops — plan accordingly for multi-day off-grid stretches.

OutdoorGearLab's testers charged a Pixel 3 to 21% in 30 minutes of full sun — "on the upper end of the spectrum" for panels they tested — and called it "one of the thinnest panels" in the category.

Best for: backpackers, van-lifers, and overlanders who need real backup power away from outlets for weekend-to-week-long stretches. Skip it if: you need to charge more than one device at once — it has a single USB port, and the panel needs repositioning roughly hourly as the sun moves. Runs ~$67 — check the current price before buying.