Last updated: October 9, 2026
Quick answer: A solar power bank is a battery pack with a small solar panel on it. The built-in panel is a slow backup, not a main charger, so charge it from the wall before a trip. If you want more panel area, pick a model with a folding four-panel setup, such as the BLAVOR 20,000mAh with 4 Foldable Panels, or pair a separate foldable panel like the BigBlue 28W with the power bank you already own.
This guide covers both routes: five power banks with built-in solar panels and three foldable solar panels that have no battery. We explain what the makers’ own figures say about sun charging time.
Disclosure: This post contains affiliate links. If you buy through them, we may earn a commission at no extra cost to you.
How we picked: We compared each listing’s battery capacity, solar panel setup, stated solar output, ports, water resistance rating and price tier, and we checked Amazon US availability for delivery to New York 10001 on October 9, 2026. We did not sun-test these products. Specs and charging times below are the makers’ figures or our arithmetic from them, and we say which is which.
Best Solar Power Banks at a Glance
| Pick | Best For | Type | Battery | Price Tier |
|---|---|---|---|---|
| BLAVOR 4-Panel | Four-panel power bank with a stated solar rating | Power bank + four-panel setup | 20,000mAh | Mid |
| BLAVOR 10,000mAh | Most-rated pick | Power bank, built-in panel | 10,000mAh | Budget |
| BLAVOR 20,000mAh | Built-in cables + wireless | Power bank, built-in panel | 20,000mAh | Mid |
| GOODaaa 24,000mAh | Largest listed battery | Power bank, built-in panel | 24,000mAh | Budget |
| SOLUPUP 30W | Maker’s stated full-charge time | Power bank + folding panels | 10,000mAh | Mid |
| BigBlue 28W | Panel to pair with a USB power bank | Foldable panel, no battery | None | Higher |
| BigBlue 35W | USB-C fast charging from sun | Foldable panel, no battery | None | Higher |
| FlexSolar 40W | Small power stations (DC port) | Foldable panel, no battery | None | Mid |
Price tiers are from each listing at our check: Budget = BLAVOR 10,000mAh and GOODaaa; Mid = BLAVOR 20,000mAh, BLAVOR 4-Panel, SOLUPUP and FlexSolar; Higher = both BigBlue panels. Prices change often, so check the current price on each listing.
Solar Power Bank or Solar Panel: Which Do You Need?
A solar power bank stores power; a foldable solar panel only makes it while the sun is on it. A power bank with one small built-in panel is a battery first and a solar charger second. A separate foldable panel offers more panel area but has no battery, so it charges a phone or power bank only while exposed to direct sunlight. Actual energy collected depends on the sun and the connected device.
The numbers explain why. A 20,000mAh power bank holds roughly 74 watt-hours (Wh), using the common 3.7 V cell rating. BLAVOR rates its four panels at 1.2 A maximum (300 mA per panel, under 25,000 lux sunlight). Assuming that current is delivered at about 5 V (the listing does not give the voltage) and sustained, that is about 6 W, so charging 74 Wh would take about 12.3 hours before losses. We have not verified actual charging times. The single-panel models don’t publish comparable solar ratings, so we cannot calculate theirs.
The makers say as much. GOODaaa’s listing recommends its solar charging for emergency use and says cable charging is faster for daily use, and BLAVOR’s 10,000mAh page notes that solar charging may be slower. SOLUPUP states 12 to 15 hours of sunlight for a full charge of its 10,000mAh battery, even with its folding panels.
Who should buy which?
- Power outages and go-bags: a solar power bank, charged from the wall in advance. The built-in panel is meant for backup charging in sunlight.
- Multi-day camping or hiking with sun: a foldable panel plus a power bank. Charge the power bank in direct sun, then charge your phone from it at night.
- Daily commuting: you probably don’t need solar at all; a regular power bank charged at home does the job.
The 8 Best Solar Power Banks and Solar Chargers for 2026
1. BLAVOR Solar Power Bank 20,000mAh with 4 Foldable Panels
- Upgraded Highly Efficient Solar Panel Charger: 4 premium panels produce 1.2A Max (300mA*4, under 25000Lux sunlight) curr…
- Fast Charging & Zero Damage: BLAVOR portable solar panel PD 18W USB-C output can charge the laptop that supports PD prot…
- Dual Light,Never Fear the Dark: Super Bright Camping light with 3-level adjustable brightness fits different outdoor env…
Why we picked it: It has four solar panels and a stated solar current rating. BLAVOR rates the panels at 1.2 A maximum combined; the maker claims that is 6x the solar charging efficiency of a single-panel solar battery pack.
The listing describes a 20,000mAh lithium-polymer battery it says is UL 2056 certified, a PD 18W USB-C port that works both ways, two USB-A outputs, IPX5 water resistance, a camping light with three brightness levels, a flashlight, a compass and a carabiner. It had 2,099 ratings at our check and ships from Amazon.
Best for: camping, van trips and outage kits where the battery may need topping up from sun for several days. Who this is NOT for: anyone who wants a pocket-sized power bank; the panels add bulk. BLAVOR specifies its maximum current under 25,000 lux illumination, so actual output depends on conditions.
Limitation: even at its best-case rating, a full charge from empty would take about 12.3 hours of sustained maximum output by our arithmetic above. Treat solar as a top-up and start the trip fully charged.
2. BLAVOR Solar Power Bank 10,000mAh Portable Wireless Charger
Why we picked it: This BLAVOR had 47,685 ratings at our check, by far the most among our picks. The listing describes a 10,000mAh battery, a 20W USB-C output, wireless charging, charging for up to 3 devices at once, IPX5 water resistance, two flashlights and a compass carabiner.
BLAVOR says the company was created in 2013 and focuses on solar charging products. At 10,000mAh, the maker says it charges an iPhone 14 Pro about 2.2 times.
Best for: a go-bag or day pack where a 10,000mAh battery meets your needs. Who this is NOT for: anyone who expects to recharge it from the sun alone; BLAVOR’s own page notes solar charging may be slower.
Note: we hid this card’s listing bullets because they include claims we could not check, such as “the smallest and lightest portable charger on the market”.
3. BLAVOR Solar Power Bank 20,000mAh, Wireless Charger with Built-In Cables
- Simultaneously Charge 6 Devices: The BLAVOR solar charger is your ultimate charging solution! With its 4 built-in cables…
- High Battery Capacity and Fast Charging: Say goodbye to low battery anxiety! The BLAVOR solar power bank packs a whoppin…
- 7 Ingenious Accessory Functions: Prepare to be amazed by the BLAVOR solar panel charger’s versatility! It’s not just abo…
Why we picked it: It carries its own cables. The listing describes four built-in cables (two USB-C, one the maker calls “iOS” and one USB-A), a wireless charging area for phones and Apple Watch, and up to six devices charging at once.
BLAVOR lists a 20,000mAh battery with 20W USB-C fast charging, a three-mode flashlight, a camping light, a compass, a thermometer and a carabiner. It had 5,225 ratings at our check and ships from Amazon.
Best for: families or groups charging different phones from one battery during an outage. Who this is NOT for: anyone who wants fast sun charging; it has a single built-in panel, and the listing does not give a solar input rating.
Limitation: the cables are built in, and the listing does not explain replacement options if one wears out.
4. GOODaaa Solar Power Bank 24,000mAh with 4 Built-In Cables
- Five Outputs & Three Inputs: This portable solar charger features 3 integrated output cables (iOS, dual USB-C) and USB-A…
- 24000mAh Portable Battery Pack: Engineered with a 24000mAh high-density lithium-polymer battery, this solar charger is b…
- GOODaaa Exclusive Design: Includes a portable carabiner to easily clip the solar battery charger onto your hiking backpa…
Why we picked it: It had the largest battery of our power bank picks and sat in the budget tier at our check. The listing describes 24,000mAh, three built-in output cables (one described as “iOS” and two USB-C) plus a built-in USB-A input cable, and up to five devices at once.
GOODaaa adds a battery-free physical thermometer, dual LED flashlights with steady, strobe and SOS modes, silicone corner bumpers and covered ports. It had 2,444 ratings at our check.
Best for: home emergency kits where a larger listed battery and budget-tier pricing are priorities. Who this is NOT for: daily solar charging; GOODaaa’s own listing recommends solar for emergency use and says cable charging is faster.
Flying with it: 24,000mAh works out to roughly 89 Wh at 3.7 V, under the 100 Wh limit in the FAA rule below. Check the Wh rating printed on the unit before you fly.
Pro Tip: Check the charge level of a solar power bank in an emergency kit from time to time, and follow the maker’s storage and charging instructions. Solar is the backup, not the plan.
5. SOLUPUP 10,000mAh Solar Charger Power Bank with Foldable 30W Panels
- 30W Solar Charging with Multiple Charging Methods: Equipped with three foldable solar panels and a 10000mAh capacity bat…
- Wide Compatibility, Multi-Device Charging: Combines QC 4.0 and PD 3.0 fast-charging technologies for higher efficiency. …
- Foldable and Portable Design, IPX5 Water and Dust Resistance: Lightweight and foldable design (folded size: 10.6×7.75×1….
Why we picked it: Among our five power bank picks, it is the only one whose listing states a sun charging time: 12 to 15 hours of sunlight for a full charge. The power bank sits in a folding case with solar panels, sold as 30W, plus one USB-C and two USB-A outputs with PD 3.0 and QC 4.0.
The listing gives a folded size of 10.6 x 7.75 x 1.4 inches, a weight of 2.3 lb, a stated IPX5 water-resistance rating and an LED flashlight. It had 135 ratings at our check, fewer than the other power banks here.
Best for: people who want an all-in-one folding-panel power bank with a maker-stated full-charge time. Who this is NOT for: anyone who needs a lot of stored power; its 10,000mAh is tied with the BLAVOR 10,000mAh for the smallest battery among our power bank picks.
Check the details: one bullet says three foldable panels, another says four, and the listing does not explain how its advertised 30W relates to the 12 to 15 hour full-charge time.
6. BigBlue 28W Solar Panel Charger with Dual USB-C and USB-A
- Advanced Performance: BigBlue 28W portable solar charger provides 20% more power from every ray, thanks to shadow-free s…
- Upgraded Triple-Port: Dual USB-C and one USB-A ports deliver a maximum output of 5V/3A each, collectively achieving 5V/4…
- High-Efficiency & IP44 Waterproof: 28W USB solar panel phone charger converts 25.4% sunlight into free energy – industry…
Why we picked it: This is a foldable panel, not a power bank, and it had 9,978 ratings at our check. BigBlue lists three ports at 5 V/3 A each (4.8 A combined), 25.4% cell efficiency (maker’s figure), IP44 splash resistance, a folded size of 11 x 6 x 1.4 inches and 1.5 lb.
BigBlue states plainly that the panel has no internal battery and works only in direct sunlight. It also advises keeping phones and tablets in the shade while charging, because heat can trigger a device’s thermal protection and slow charging.
Best for: charging a USB-charged power bank you already own during sunny days at camp. Who this is NOT for: anyone who needs power after dark without a separate power bank, or wants USB-C PD fast charging, which this listing does not specify (its ports are listed at 5 V).
Limitation: IP44 means splash resistance, not waterproofing; bring it in during rain.
7. BigBlue 35W Solar Charger with PD 25W USB-C
![[Upgraded] BigBlue 35W Solar Charger with Fast Charging USB-A/PD ...](https://m.media-amazon.com/images/I/41m-Jb4PNYL._AC_.jpg)
- Power More Devices Anywhere: Features 2 Type-C ports and 1 USB-A port to charge a wide range of devices including Androi…
- Fast & Smart Solar Charger: USB-A supports QC 18W, while Type-C1 delivers PD 25W with PPS (Programmable Power Supply) fo…
- Ultra-Portable & Lightweight: Foldable to just 8.29 × 4.84 × 1.89 inches and weighing only 1.54 lbs, this compact solar …
Why we picked it: It explicitly lists USB-C PD fast charging, which the 28W listing does not. BigBlue lists PD 25W with PPS on one USB-C port, QC 18W on USB-A, a second USB-C port, 25.4% efficiency cells and a dual parallel circuit that keeps one section charging when the other is shaded.
The listing gives a folded size of 8.29 x 4.84 x 1.89 inches and 1.54 lb, with an IP68 panel rating. It had 1,571 ratings at our check.
Best for: charging a USB-C power bank or phone that supports PD fast charging. Who this is NOT for: anyone who needs to leave it out in heavy rain; BigBlue notes the USB junction box is not waterproof.
Limitation: like every panel here, it has no battery and stops charging when the sun goes.
8. FlexSolar 40W Foldable Solar Panel Charger with USB-C, USB-A and DC Outputs
- 【40W Dual Fast-Charging Solar Charger】Equipped with QC3.0 USB-A & PD2.0 USB-C ports (18W max each) for simultaneous fast…
- 【SMART IC CHIP TECHNOLOGY & SAFETY FEATURE】Integrated IC automatically detects the connected devices and provides the op…
- 【40W Ultra-Lightweight Foldable Solar Panel】 Ideal for mobile camps and off-grid adventures, this compact 40W solar pane…
Why we picked it: It adds a 19 V DC port (40W max) that FlexSolar says can directly power small power stations, alongside QC3.0 USB-A and PD USB-C ports at 18W max each. It had 1,310 ratings at our check and sat in the mid price tier.
FlexSolar lists 24% efficiency cells, IP67 dust and water resistance, a folded size of 8.0 x 11.1 x 1.8 inches and 1.76 lb. The maker says shade or partial coverage may cut output by up to 70% and recommends a 45-degree angle facing the sun.
Best for: people who may later move up to a small portable power station. Who this is NOT for: anyone who wants maximum USB-C speed; its USB-C port is listed at 18W max, below the BigBlue 35W’s 25W.
Limitation: FlexSolar says the junction box is not fully waterproof, so store it indoors during heavy rain.
How to Get More From Solar Charging
Point the panel at the sun, keep the device in the shade, and consider charging a power bank rather than your phone. The positioning and shading advice comes from maker notes; the power bank setup is our suggestion.
- Angle it. FlexSolar recommends a 45-degree angle facing direct sunlight; BLAVOR’s panel rating is given under 25,000 lux illumination.
- Avoid shade. FlexSolar says partial shade can cut output by up to 70%.
- Keep phones cool. BigBlue advises keeping phones and tablets in the shade, since heat can trigger thermal protection that slows charging.
- Store sun in a battery. A separate power bank stores energy from the panel, so you can charge your phone later, even when there is no sun.
Can you take a solar power bank on a plane?
Yes, in your carry-on only. According to FAA PackSafe guidance, power banks must be carried in carry-on baggage only and must be removed from a bag checked at the gate. Lithium-ion batteries are limited to 100 Wh per battery without airline approval. Check your airline’s rules too.
How do you dispose of an old power bank?
Not in the trash or the recycling bin. The EPA says lithium-ion batteries and devices containing them should go to separate recycling or household hazardous waste collection points, and recommends taping battery terminals to prevent fires.
Notes for UK and EU Readers
The product links on this page go to Amazon US, and we did not verify international delivery. Check delivery eligibility before ordering, and check local collection points and retailer take-back policies before disposing of a battery. For more ways to cut energy use at home, see our guide to reducing energy bills without solar panels.
Deal Tip: If you shop around Black Friday, compare the exact model, listed battery capacity and panel setup on offer, not just the discount.
Related Guides
- Best solar-powered garden lights
- Best energy-efficient smart home devices
- How to make your home more eco-friendly in 10 steps
Frequently Asked Questions
Do solar power banks actually work?
Yes, as a power bank, with solar as a backup. The built-in panel is intended for backup charging in sunlight, and we have not verified its output. GOODaaa’s own listing recommends its solar charging for emergency use and says cable charging is faster, so charge it from the wall first.
How long does a solar power bank take to charge in the sun?
It depends on the panel and the sun. SOLUPUP states 12 to 15 hours of sunlight for its 10,000mAh battery with folding panels. By our arithmetic from BLAVOR’s 1.2 A rating (assuming 5 V and sustained maximum output), its 20,000mAh four-panel model would need about 12.3 hours before losses. Single-panel models don’t publish comparable ratings.
Is a solar power bank or a solar panel better for camping?
For several days in good sun, a foldable panel plus a separate power bank gives you more panel area. A solar power bank is simpler to carry and works well as an emergency backup.
Can I charge my phone directly from a solar panel?
Yes, the foldable panels here have USB ports. Keep the phone in the shade, as BigBlue advises, and expect charging to stop or slow when clouds pass. A power bank lets you store the energy for later.
Can you take a solar power bank on a plane?
Yes, in carry-on baggage only, per FAA guidance. Lithium-ion batteries are limited to 100 Wh each without airline approval; a 24,000mAh power bank is roughly 89 Wh at 3.7 V. Check the rating printed on the unit.
How should I store a solar power bank in an emergency kit?
Keep it charged, check its charge level from time to time and follow the maker’s storage instructions. The panel can add backup charge in sunlight during a long outage.
The Bottom Line
Buy a solar power bank as a charged battery with a solar backup, not as a sun-only charger. The BLAVOR 20,000mAh with 4 Foldable Panels has four panels and a stated solar rating, and the GOODaaa 24,000mAh has the largest listed battery among our picks, in the budget tier. For more panel area on multi-day trips, pair the BigBlue 28W panel with a power bank you already own.
🌿 Get Your Eco-Swaps Delivered Free
Try Amazon Prime free for 30 days — fast free delivery on sustainable essentials, plus Prime Video and more. Cancel anytime.
Start Your Free Prime TrialAs an Amazon Associate we earn from qualifying purchases.