SolarPowerNerd
Mini solar panels serve two very different audiences. DIY builders need small cells with specific voltage outputs, usually 5V or 6V, to power Arduino projects, garden sensors, and homemade charging circuits.
Campers and hikers need foldable USB panels with enough wattage to charge a phone in a few hours. Buying the wrong type for your use case wastes money.
For DIY projects, voltage output matching is critical. A 5V 30mA panel can trickle-charge a small lithium cell or run a low-power sensor, but it will not power a motor or a Raspberry Pi.
Wiring panels in series increases voltage while wiring in parallel increases current, so a 10-pack of small cells gives you flexibility to build the exact power source your project needs. For portable charging, look for at least 10W with USB-C output to keep modern phones topped up at a reasonable speed.
Quick Comparison Chart
| # | Product | Our Rating | ||
|---|---|---|---|---|
| 1 |  |
BigBlue 28W Portable Solar Charger | ★★★★★ | Check Price |
| 2 |  |
AOSHIKE 10Pcs 5V 30mA Mini Solar Panels | ★★★★☆ | Check Price |
| 3 |  |
Anker 21W 2-Port USB Solar Charger | ★★★★☆ | Check Price |
| 4 |  |
Sunnytech 2W 6V Mini Solar Panel Module | ★★★★☆ | Check Price |
| 5 |  |
BLAVOR 10W Portable Solar Charger | ★★★★☆ | Check Price |
| 6 |  |
Nekteck 21W Portable Solar Panel Charger | ★★★★☆ | Check Price |
| 7 |  |
NUZAMAS Micro Mini Solar Panel (Set of 4) | ★★★★☆ | Check Price |
| 8 |  |
Renogy E.Flex 10W Monocrystalline Solar Panel | ★★★★☆ | Check Price |
| 9 |  |
ECEEN 13W Foldable Solar Panel and Charger | ★★★★☆ | Check Price |
| 10 |  |
BLAVOR Solar Charger with Detachable Panels | ★★★★☆ | Check Price |
From 28W Foldable Chargers to Tiny DIY Cells: What Separates the Best Mini Solar Panels
This list covers everything from the BigBlue 28W foldable charger with 25.4% efficiency and three USB ports down to micro cells like the AOSHIKE 10-pack that measure just over two inches across. We ranked them on conversion efficiency, portability, and real-world charging speed.
The split in this category is clear: foldable panels above 20W are built for phone and tablet charging on the trail, while sub-2W micro panels exist for DIY circuits and science projects. If you need something specifically in the lower wattage range, our best 5 watt solar panels roundup covers that niche in more detail.
Know which camp you fall into before you buy.
1. BigBlue 28W Portable Solar Charger
BigBlue 28W Portable Solar Charger
A 28W foldable solar charger with triple USB ports (dual USB-C and one USB-A) and advanced N-type solar cells that deliver up to 25.4% conversion efficiency.
Pros
- Three USB ports charge multiple devices at once
- Industry-leading 25.4% solar conversion rate
- IP44 rated for rain and fog resistance
- Folds to a compact 11x6 inches for backpacks
- Shadow-free panel design boosts output
Cons
- Not powerful enough for laptops or large power stations
- USB junction box is not waterproof
BigBlue is a highly efficient, portable, and durable mini solar panel.
These small solar panels have 3 USB ports for extra convenience in charging your devices. The 3 USB ports offer a total current at 5V/4.8A Max, and the panel has CE, FCC, and RoHS certifications.
The ports are protected from dust and water damage thanks to a cloth flap and rubber cover. It’s protected from light rain and fog thanks to its unique PET polymer surface.
BigBlue 28W is equipped with four pieces of incredibly efficient solar panel converters by SunPower. This converts around 21.5-23.5% of solar power into free energy in the sunlight.
BigBlue 28W also supports a wide variety of phone models and cameras with compatible USB cables. The BigBlue 28W is 11.1 x 6.3 x 1.3 inches folded, or 33.1 x 11.1 x 0.2 inches when opened.
With a weight of 1.29 pounds, BigBlue 28W is a lightweight device for traveling, though it is a little bulky. BigBlue is a solid choice if you want a well-rounded and complete mini solar panel.
2. AOSHIKE 10Pcs 5V 30mA Mini Solar Panels
AOSHIKE 10Pcs 5V 30mA Mini Solar Panels
A 10-pack of polycrystalline mini solar panels rated at 5V 30mA, each measuring 2.08 x 1.18 inches, built for DIY electronics and science projects.
Pros
- Ten panels per pack for multiple projects at once
- 5V output charges small batteries and sensors directly
- Compact 2.08 x 1.18 inch size fits tight spaces
- Polycrystalline cells work in partial sunlight
Cons
- 30mA current limits use to low-draw devices
- No pre-attached wires or connectors included
AOSHIKE’s 10-piece set is hard to beat for anyone building multiple DIY solar projects at once. Each polycrystalline panel measures just 2.08 x 1.18 inches and outputs 5V at 30mA, which is enough to power small sensors, LED circuits, and science fair displays.
The 5V output is the standout spec here. Most micro solar cells in this size range top out at 1.5V or 2V, so you’d need to wire several in series to reach USB voltage.
These hit 5V per panel out of the box, which simplifies wiring for battery chargers and microcontroller projects.
Build quality is decent for the price point. The epoxy resin coating handles light outdoor exposure, though these aren’t built for permanent weatherproof installations.
For classroom projects, prototyping, or powering small gadgets on a windowsill, the value of getting ten panels in one order is tough to match.
3. Anker 21W 2-Port USB Solar Charger
Anker 21W 2-Port USB Solar Charger
A 21W foldable solar charger from Anker with dual USB ports, SunPower cells delivering 21.5-23.5% efficiency, and a rugged PET polymer build.
Pros
- Trusted Anker brand with 30 million users
- Up to 3 amps total output in direct sun
- Weighs only 14.7 oz with ultra-thin profile
- Stainless-steel eye-holes for easy attachment
- Includes 18-month warranty and support
Cons
- Only two USB ports versus three on competitors
- Charging slows significantly in partial shade
The Anker 21W is another high-functioning alternative with capabilities similar to the BigBlue. It offers high performance, durability, and convenience.
Anker provides a charging speed of 2.4 amps to 3 amps overall in direct sunlight per port and a 21.5-23.5% efficiency rate with its 21-watt SunPower solar array. It is also compact at 11.1 x 6.3 inches folded, or 26.4 x 11.1 inches opened.
It works with many smartphones including iPhone and Samsung Galaxy models, along with iPad Pro, Air, and Mini. Every purchase includes an 18-month warranty card and specialized customer service.
4. Sunnytech 2W 6V Mini Solar Panel Module
Sunnytech 2W 6V Mini Solar Panel Module
A 2W polysilicon mini solar panel with epoxy resin coating that outputs 6V at 330mA, designed for DIY projects, science experiments, and small battery charging.
Pros
- High-quality epoxy resin resists wind and snow
- Can connect panels in series or parallel
- Weighs just 0.05 lbs for maximum portability
- Excellent for school and science projects
Cons
- Limited to 2W so only powers small devices
- No USB port requires additional wiring
Sunnytech’s Mini Solar Panel Module is a solid fit for small solar energy needs. It yields a maximum power capacity of 2W and a maximum voltage of 6V with a 330mA current.
This can be a great solar panel for science projects, electronic power sources, and other small power appliances in your home. Its high-quality build features an epoxy resin coating and technology that protects against wind and snow.
This mini solar panel measures 5.35 x 4.33 x 0.12 inches and weighs only 0.05 lbs, which makes it easy to take anywhere. You can also connect more solar panels in series or parallel, which is a handy feature for scaling up your setup.
5. BLAVOR 10W Portable Solar Charger
BLAVOR 10W Portable Solar Charger
A foldable 10W solar charger with ETFE film, 24% conversion efficiency, USB-C and USB-A outputs, and IPX4 waterproof rating for hiking and camping.
Pros
- ETFE film delivers 24% conversion efficiency
- Both USB-C and USB-A ports for flexible charging
- IPX4 waterproof handles rain and splashes
- Foldable design with carabiner clips for backpacks
Cons
- 10W output charges phones slower than 20W+ panels
- No built-in battery for storing charge overnight
BLAVOR’s 10W foldable charger stands out in the compact charger space because of its ETFE high light transmission film, which pushes conversion efficiency to 24%. That’s a noticeable bump over the 20-22% you get from most panels in this wattage class.
The dual-port setup is the other selling point. Having both USB-C and USB-A means you can charge a newer phone through USB-C while running a headlamp or GPS off the USB-A port.
Max output sits at 5V/2A, which won’t fast-charge anything but keeps devices topped off steadily through the day.
At 10W, this is squarely a phone and small device charger. It folds compact enough to clip onto a daypack with the included carabiners, and the IPX4 rating means light rain won’t be a problem.
If you need more power, look at the 21W options higher on this list.
6. Nekteck 21W Portable Solar Panel Charger
Nekteck 21W Portable Solar Panel Charger
A 21W foldable solar charger with SunPower Maxeon cells, dual USB ports, IPX4 waterproof rating, and smart IC chip technology for safe fast charging.
Pros
- IPX4 certified for water and dust resistance
- Smart IC chip prevents overheating while charging
- 21-24% conversion efficiency with Maxeon cells
- Folds to just 6.3x11.1 inches at 17.3 oz
Cons
- Canvas surface can show wear over time
- Requires direct sunlight for full 3A output
Nekteck 21W Portable Solar Panel Charger is an excellent device for camping and outdoor adventures. It delivers impressive power converting efficiency along with exceptional durability and quality.
The Nekteck takes pride in its efficiency with three monocrystalline solar panel cells and a 21-24% conversion rate thanks to SunPower Maxeon technology. It offers a maximum power of up to 2.0A per port and 3.0A overall and features an advanced smart IC chip that enables fast charging while preventing overheating.
On the portability side, the Nekteck has a 6.3 x 11.1 x 1.06 inch folded size and 17.3-ounce weight. It also comes wrapped with a PET polymer cover and a certified IPX4 label that guarantees resistance to water and dust.
7. NUZAMAS Micro Mini Solar Panel (Set of 4)
NUZAMAS Micro Mini Solar Panel (Set of 4)
A set of four 5V micro solar panels measuring just 53x30mm each, ideal for DIY projects, science experiments, and charging small DC batteries under 5V.
Pros
- Four panels included for multiple projects
- Silent green energy with zero emissions
- Perfect for school and science experiments
- Charges small DC batteries under 5V
Cons
- Only 0.15W per cell limits power output
- Requires soldering for most applications
The NUZAMAS Micro Mini Solar Panel is a viable option for DIY projects and small electronic appliances. It uses a polycrystalline small panel for its energy converter, with a maximum power of 0.15W per cell, a working voltage of 5V, and a max current of 30mA.
These panels can power small household appliances, projects, and charge small DC batteries. Each panel is just 53mm x 30mm x 2mm and weighs about 0.8 ounces.
Despite the small size and power output, NUZAMAS panels are great for DIY projects. They can charge batteries while you’re outdoors fishing, hunting, or on a camping trip, and they are also excellent for various school projects.
8. Renogy E.Flex 10W Monocrystalline Solar Panel
Renogy E.Flex 10W Monocrystalline Solar Panel
A 10W monocrystalline solar panel from Renogy with auto-optimization charging, USB output, and an ultra-thin foldable design weighing just 8.7 ounces.
Pros
- Auto-optimization resumes charging instantly
- Incredibly light at just 8.7 ounces
- Includes carabiners and suction cups
- Two 5W panels in one foldable package
- Reputable Renogy brand with 1-year warranty
Cons
- 10W output charges slower than 21W models
- Works best paired with a separate power bank
Renogy is a well-known brand in the solar energy industry, and it delivers another worthy small, portable solar panel with the E.Flex. It offers incredible charging power with balanced portability and convenience.
It is equipped with built-in monocrystalline solar cells that provide maximum efficiency. The auto-optimization charging feature allows for a continuous charge the moment you are back in the sunlight with no delay.
Weighing only 8.7 ounces with a dimension of 9.5 x 5.9 x 0.26 inches folded and 9.5 x 12.2 x 0.13 inches unfolded, the E.Flex provides portability through its ultra-thin design. Renogy also includes carabiners and suction cups to maximize the ease of use while traveling, hiking, biking, fishing, or camping.
This particular 10W solar panel consists of two individual 5W solar panels in one package.
9. ECEEN 13W Foldable Solar Panel and Charger
ECEEN 13W Foldable Solar Panel and Charger
A 13W foldable solar charger with mono-crystalline cells delivering up to 24% efficiency, dual USB ports, IPX4 waterproofing, and a durable oxford cloth build.
Pros
- Up to 24% conversion efficiency from mono-crystalline cells
- Built-in voltage regulator protects your devices
- IPX4 waterproof with durable oxford cloth cover
- Dual USB ports for charging two devices
- Includes 4 carabiners for backpack mounting
Cons
- Cannot charge laptops or iPad Pro models
- Requires direct sunlight for optimal output
The ECEEN 13W Foldable Solar Panel and Charger is a well-built device that will satisfy your solar charging needs. It offers excellent power efficiency in a lightweight and ultra-compact form with a unique design.
The ECEEN uses mono-crystalline solar cells that provide up to 24% efficiency with a 2A maximum output. It also features a sleek design with high-quality polyester, providing excellent weather resistance for outdoor use.
The built-in voltage regulator keeps voltage and current stable to protect your devices while charging.
It includes dual USB outputs for convenient charging, a net pocket, Velcro straps for extra convenience, and 4 free carabiners. With a folding size of only 6.3 x 11.1 x 1.06 inches, the ECEEN provides superior portability at just 0.85 lbs. It delivers strong value for anyone looking for a dependable camping and hiking charger.
10. BLAVOR Solar Charger with Detachable Panels
BLAVOR Solar Charger with Detachable Panels
A 20000mAh solar power bank with five magnetically detachable panels, Qi wireless charging, dual USB output, flashlight modes, and a built-in compass.
Pros
- Built-in 20000mAh power bank stores energy
- Five detachable magnetic solar panels
- Qi wireless charging for compatible phones
- Three flashlight modes for emergencies
- Compass kit included for outdoor adventures
Cons
- Weighs 21.7 oz which is heavier than panel-only options
- Solar charging speed is slower than wired input
The BLAVOR Portable Detachable Solar Panel and Charger is an all-in-one package that works well if you want a full kit rather than only a solar panel. It includes a 20000 mAh power bank built right in.
BLAVOR offers five magnetically detachable solar panels that can also work as an individual portable power bank with a dual output. It features three flashlight modes and a Qi wireless output that allows you to charge three devices at once, and it even comes with a compass kit.
The power performance is solid, with a solar panel charging rate of 1300mA maximum. The USB port supports 2.1A high-speed charging and auto-detects your device’s current to adjust to the optimal charging output.
It also has wireless charging for Qi-enabled phones including iPhone and Samsung Galaxy models. The BLAVOR measures 6.1 x 3.2 x 1.5 inches and weighs 21.7 ounces.
Why Use Solar Panels?
Solar panels are becoming increasingly important.
Although sunny days deliver more solar energy, solar panels will draw energy even during cloudy days.
The sun powers your home even on cloudy days when solar panels produce around 10 to 20% of the power they usually generate on sunny days.
Annual energy costs are high and solar panels can reduce these costs. The power of the sun is free to capture and you can use it to power any device.
Why Are Solar Panels Better Compared to Traditional Power Sources?
Solar panels combat greenhouse gas emissions and reduce dependence on fossil fuels such as coal and natural gas.
The burning of fossil fuels to produce electricity emits harmful gases that pollute the air and contribute to global climate change.
On the other hand, renewable energy such as solar power improves public health and can reduce premature mortality and healthcare costs.
Solar energy requires little to no water, which is another reason why solar panels are a clean and sustainable energy source.
Most mini solar panels are high-efficiency panels that offer good performance.
They are usually installed as a part of individual portable gadgets you can take anywhere with you.
Thus, they are perfect for everyday use and trips.
Final Thoughts
This list covers two very different use cases, and recognizing which one you need saves time. The AOSHIKE, Sunnytech, and NUZAMAS panels are true mini cells for DIY electronics and science projects.
The BigBlue, Anker, and Nekteck are foldable phone chargers that happen to pack down small. They are not interchangeable.
For phone charging on hikes, the BigBlue 28W consistently outperformed the 21W panels thanks to its 25.4% N-type cells and triple USB ports. The Anker remains a solid second choice if you prefer the brand support and only need two ports.
The BLAVOR detachable panel power bank was the most self-contained option since it combines five solar panels, a 20000mAh battery, and Qi wireless charging in one unit. It is heavier at 21.7 oz, but you do not need to carry a separate power bank, which simplifies packing.
If you are interested in DIY builds or solar kits for kids, the tiny AOSHIKE and NUZAMAS panels pair well with breadboard circuits and small motors for hands-on learning projects.
