Best Solar Power Banks for Hiking in 2025 (Tested on Trail)

The best solar power bank for hiking isn't the one with the biggest specs on paper — it's the one that matches the trip you're actually taking. After a season of trail-testing on the PCT, the AT, and a dozen weekend loops in the Whites, we put together this honest 2025 guide to choosing a solar charger for backpacking.

Why solar makes sense on multi-day trips

A standard 10,000 mAh power bank will get a typical phone through 2–3 full charges. For a day hike, that's plenty. But the moment you start adding nights — plus a GPS, a headlamp, maybe a Garmin inReach — the math gets tight. By night three, you're rationing battery and turning off airplane mode only to check waypoints. Not fun.

A portable solar charger for hikers changes the equation. Instead of carrying enough stored power for the whole trip, you carry a bank that regenerates from sunlight while it's strapped to the top of your pack. On a clear afternoon, you'll bank back roughly a phone-charge of energy. Over a three-day weekend, that's the difference between rationing and relaxing.

What to look for in a hiking solar charger

• Wattage (panel input): 10W is enough to slowly top up a phone in full sun. 20W charges meaningfully faster and can keep a phone + GPS running. 30W+ can charge a tablet or even a small laptop via USB-C PD.
• Battery capacity: 10,000 mAh is one full phone charge for most users. 20,000 mAh covers a couple of devices over a weekend. 30,000 mAh is true expedition territory.
• Weight: Every gram counts when you're moving uphill. A good rule: don't carry more capacity than you'll actually use, and don't skip ounces by buying a panel that charges too slowly to matter.
• Durability: Look for IP65+ weather sealing, recessed ports with rubber covers, and a strap or carabiner clip that survives real packs.
• Pass-through charging: Lets you charge a device from the bank while the panel is feeding the bank — handy at lunch stops in clear sun.

Day hike vs. weekend vs. 3+ days: matching your kit to the trip

The trip length is the single biggest input into your gear choice. Here's the simple framework we use:

• Day hikes (≤12 hours out): A 10W panel + 10,000 mAh bank is more than enough. You're really just buying insurance for a dead phone at the trailhead. The NovaDrop Spark is built for this.
• Weekend trips (1–2 nights): A 20W panel + 20,000 mAh bank is the sweet spot. Enough to cover a phone, GPS, and headlamp comfortably without being heavy. The NovaDrop Volt is our pick.
• 3+ days / thru-hike sections: 30W panel + 30,000 mAh capacity. You can power a small group's devices and still have margin for a cloudy day. The NovaDrop Apex is the workhorse.

NovaDrop comparison table

NovaDrop Spark — best for day hikes

The NovaDrop Spark is the lightest way to never have a dead phone at a trailhead again. The 10W panel tops up a phone reliably in 3–4 hours of full sun, and the 10,000 mAh bank is enough for a full charge plus margin. At $44.99 it's the easy entry point. Buy the Spark →

NovaDrop Volt — best for weekend trips

The NovaDrop Volt is what we actually carry on most weekend trips. 20W of solar input means you can fully top up the 20,000 mAh battery in a long lunch stop, and the IP65 housing has shrugged off New Hampshire downpours without complaint. $79.99. Buy the Volt →

NovaDrop Apex — best for extended expeditions

For trips that go more than three days off-grid, the NovaDrop Apex is the only one we'd trust. 30W input, 30,000 mAh capacity, and USB-C Power Delivery output that can charge a small laptop. If you're guiding, thru-hiking, or shooting photo on a multi-week trip, this is the bank. $129.99. Buy the Apex →

Related reads

• How to Keep Your Devices Charged While Traveling
• How to Work Remotely Off the Grid
• Solar Charger Buyer's Guide (2025)

Pick the right bank for your trail and you'll forget it's even on your pack — until the moment it saves you. Browse the full NovaDrop lineup to find your match.