When searching for a foldable solar panel with USB output, the key considerations are portability, power capacity, and versatility. The Solupup 30W Portable Foldable Solar Charger stands out as the overall best because of its balanced size, waterproof design, and dual USB ports. For those prioritizing lightweight options, the FlexSolar 10W 5V USB Foldable Solar Panel delivers reliable charging in a compact form. Meanwhile, the BigBlue 28W Solar Panel Charger offers high efficiency and multiple USB ports for faster device charging. The main tradeoffs involve balancing size, power output, and durability. Continue reading for a detailed review of how each model stacks up across key features.
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Key Takeaways
- The top-ranked panels combine high efficiency with waterproof durability, suitable for outdoor use.
- Size and weight vary significantly, influencing portability for backpackers and travelers.
- Higher wattage models typically include multiple USB ports and additional outputs, but may be bulkier.
- Build quality and weather resistance are critical for longevity and real-world outdoor performance.
- Price correlates with power capacity and feature set, but the most expensive isn’t always the best fit for casual use.
| foldable solar panel usb output | Weight | Power |
|---|---|---|
| SOLUPUP 30W Portable Foldable | 2.4 lbs | 30W |
| FlexSolar 10W 5V USB Foldable | 0.66 lbs | — |
| BigBlue 28W High-Efficiency So | 1.5 lbs | 28W |
| 300W Portable Solar Panel for | 25.5 lbs | — |
| 440W Portable Solar Panel Fold | — | — |
| 10W Portable Solar Charger | 0.76 lbs | — |
| FlexSolar 20W Foldable Solar P | 14.0 ounces | 20W |
| FlexSolar 40W Foldable Solar P | 1.76 lbs | 40W |
| 60W Portable Foldable Solar Pa | — | — |
| Marbero Portable 30W Foldable | — | — |
| Solarapex 200W Portable Foldab | 16 lbs | 200W |
| FlexSolar 100W Foldable Portab | 4.1 lbs | 100W |
More Details on Our Top Picks
SOLUPUP 30W Portable Foldable Solar Charger with USB-A and USB-C, Waterproof, for Camping and Outdoors
This solar charger stands out for its combination of efficiency, durability, and portability, making it ideal for outdoor enthusiasts who need reliable power on the go. Its monocrystalline silicon technology delivers faster charging compared to lower-efficiency options like the FlexSolar 10W, but the actual output can vary with weather and placement. The waterproof IPX5 rating and included stand make it a dependable choice for camping and hiking, though it’s limited to small electronics and cannot store energy. Compared with the larger 300W panel, this device offers a more manageable size while still providing solid power for smartphones, tablets, and small devices. The tradeoff is that its relatively modest 30W output won’t support larger gadgets or power stations.
Pros:- High-efficiency monocrystalline silicon for faster charging
- Waterproof and dustproof design enhances outdoor durability
- Lightweight with included carabiners and adjustable stand for portability
Cons:- Output depends heavily on weather and sunlight conditions
- Limited to small electronics with 5V charging capability
Best for: Outdoor adventurers who need a lightweight, durable panel to charge multiple small devices during camping trips.
Not ideal for: Users seeking to power larger electronics or need energy storage, as this panel is limited to small device charging and weather-dependent output.
- Power:30W
- Output Ports:USB-A and USB-C
- Waterproof Rating:IPX5
- Weight:2.4 lbs
- Folded Size:10.63 inches
Our verdict“This panel suits outdoor users who prioritize portability and durability over high wattage or energy storage capability.”
FlexSolar 10W 5V USB Foldable Solar Panel Charger IP67 Waterproof
The FlexSolar 10W foldable panel is perfect for those who need a highly portable solution for charging smartphones and small devices in unpredictable weather, thanks to its IP67 waterproof rating. Compared with larger panels like the 440W SolarBag, this option is much easier to carry and set up, but its low 10W output limits its use to quick top-ups rather than continuous power. Its high-efficiency monocrystalline cells with a 24% conversion rate ensure decent charging speeds under ideal sunlight, but it cannot store energy, requiring direct sunlight and active devices. The junction box is not waterproof, which is a concern in heavy rain or splashes, but overall, this panel excels for short outdoor trips where space and weight matter most.
Pros:- High-efficiency monocrystalline cells with 24% conversion
- Very lightweight and foldable for easy carrying
- IP67 waterproof rating for outdoor resilience
Cons:- Limited to 10W output, not suitable for large devices
- No energy storage or backup capability
Best for: Hikers or travelers who need a compact, reliable panel for quick device charging without extra bulk.
Not ideal for: People aiming to power larger gadgets or needing energy storage, since this relies on direct sunlight and offers no built-in battery.
- Power Output:10W
- Voltage:5V
- Max Current:2A
- Material:ETFE film lamination
- Dimensions (Folded):7.6 x 8.8 x 0.7 inches
- Weight:0.66 lbs
Our verdict“This panel is best for lightweight, emergency device charging where size and weather resistance are priorities.”
BigBlue 28W High-Efficiency Solar Panel Charger with Dual USB-C and USB-A
The BigBlue 28W panel offers a balanced mix of high-efficiency solar cells and multiple ports, making it suitable for camping, hiking, or emergency situations. Its 25.4% conversion rate outperforms many lower-efficiency panels like the FlexSolar 20W, providing faster charging times for smartphones and tablets. The multiple ports—two USB-C and one USB-A—allow simultaneous device charging, yet it cannot store power, so it relies on direct sunlight. Its IP44 rating protects against splashes, but the USB junction box isn’t waterproof, which could be problematic in rainy conditions. While it’s capable of charging multiple small devices, it’s not designed for larger electronics or powering a power station, which limits versatility.
Pros:- High-efficiency solar cells with 25.4% conversion rate
- Multiple ports for simultaneous device charging
- Compact and durable for outdoor use
Cons:- No energy storage options or backup power
- Limited to direct sunlight and small device charging
Best for: Campers or emergency prepper who need a compact, high-efficiency panel for multiple device charging simultaneously.
Not ideal for: Those seeking to power larger electronics or looking for energy storage, as this panel cannot supply enough wattage for bigger gadgets or batteries.
- Power:28W
- Ports:2 USB-C, 1 USB-A
- Output:5V/3A per port
- Waterproof Rating:IP44
- Dimensions:11 x 6 x 1.4 inches
- Weight:1.5 lbs
Our verdict“This panel excels in scenarios where quick, multiple device charging in bright sunlight is needed without the burden of extra weight.”
300W Portable Solar Panel for Power Station, Foldable ETFE Charger, USB-C, IP67 Waterproof for Camping & Emergency
Compared with smaller panels like the BigBlue 28W, this 300W foldable panel delivers substantial power suitable for charging power stations and larger devices, making it an excellent choice for serious outdoor power needs. Its high-efficiency 23% monocrystalline cells maximize energy conversion, and the multiple output ports—including USB-C—support a variety of devices. The large size and weight (25.5 lbs) make it less ideal for quick hikes but perfect for RVing or emergency backup. The IP67 waterproof rating offers sturdy outdoor protection, yet the USB junction box isn’t waterproof, so caution is necessary near water. For users needing high wattage and multiple charging options, this panel offers a significant upgrade but requires additional equipment like batteries or power stations to fully utilize its capacity.
Pros:- High-efficiency 23% monocrystalline cells for better energy capture
- Multiple ports including USB-C for versatile device charging
- IP67 waterproof and dustproof for tough outdoor conditions
Cons:- Large size and weight may be cumbersome for some users
- No built-in energy storage, requiring additional equipment
Best for: Campers or preppers with larger power needs who have space for a heavier panel and want to connect to power stations or batteries.
Not ideal for: Lightweight backpackers or those needing a compact solution, as its size and weight are considerable for quick setup or portability.
- Maximum Power:300W
- Output Voltage:5V
- Material Type:Portable ETFE
- Waterproof Rating:IP67
- Item Dimensions:98.43″ L x 28.94″ W x 1.1″ H
- Weight:25.5 lbs
Our verdict“Ideal for serious outdoor users needing high power output and durability, provided they can handle the size and weight.”
440W Portable Solar Panel Foldable SolarBag for Camping and Off-Grid Use
The SolarBag’s 440W output, combined with its foldable, lightweight design, makes it a standout for off-grid power needs, especially when paired with compatible batteries or power stations. Its 25% efficiency ensures good energy conversion, and multiple USB ports—including USB-C—allow charging of several devices simultaneously. Compared to smaller panels like the 28W BigBlue, this unit offers significantly more power, suitable for comprehensive off-grid setups or RV use. However, it requires additional equipment to store or use the generated power effectively, and its size when unfolded can be cumbersome for some. The IP65 rating offers decent weather resistance, but the USB junctions are not waterproof, so water exposure should be limited.
Pros:- High output with 440W capacity for serious power needs
- Foldable and relatively lightweight for its class
- Multiple USB ports enable charging several devices at once
Cons:- Requires compatible batteries or power stations to store energy
- Some features sold separately, increasing overall cost
Best for: Off-grid enthusiasts or RV owners needing substantial power in a portable, foldable format.
Not ideal for: Hikers or backpackers seeking lightweight, quick setups, as the panel’s size and weight are less manageable for quick trips.
- Power Output:440W
- Panel Efficiency:25%
- Number of Panels:2×220W
- Compatibility:Most portable power stations, LiFePO4 batteries
- Ports:USB-C 45W, USB-A 18W, USB-A 15W
- Warranty:3 years
Our verdict“Best suited for users with larger power demands who can accommodate its size and want reliable off-grid energy.”
10W Portable Solar Charger, Foldable Solar Panel with USB-A and USB-C Output
This ultra-lightweight 10W panel excels at portability, weighing just 0.76 lbs and measuring under 8 inches when folded. Its high 24% efficiency makes it a solid choice for quick, on-the-go device charging, especially in bright sunlight. Compared to larger options like the 60W Portable Foldable Solar Panel, it offers less power, but the tradeoff is superior ease of carrying and quick setup. Its water-resistant ETFE surface adds durability for outdoor adventures, though the limited wattage means it’s best suited for smartphones and small gadgets rather than larger electronics or multiple devices simultaneously.
Pros:- Extremely lightweight and compact for backpacking
- High efficiency of 24% enables faster charging in direct sunlight
- Water-resistant ETFE-coated surface enhances durability outdoors
Cons:- Limited power output restricts charging speed for larger devices
- Optimal performance depends on direct, unobstructed sunlight
Best for: Hikers, campers, and outdoor enthusiasts needing a portable, easy-to-carry panel for quick device top-ups.
Not ideal for: Users looking to charge larger devices or multiple electronics at once, as its 10W output is insufficient for high-power needs.
- Power Output:10W
- Weight:0.76 lbs
- Dimensions:7.7 x 7.6 x 0.98 inches
- Efficiency:24%
- Compatibility:USB-A, USB-C
- Surface Material:ETFE-coated
Our verdict“This pick is ideal for outdoor adventurers prioritizing portability over high power output.”
FlexSolar 20W Foldable Solar Panel Charger with USB-A & USB-C Output
With 20W of power, the FlexSolar 20W strikes a good balance between portability and charging capacity. Its high-efficiency monocrystalline cells and waterproof ETFE film make it a reliable choice during outdoor adventures or emergency situations, outperforming smaller 10W panels like the 10W Portable Solar Charger in terms of charging speed for tablets and multiple devices. Its lightweight design, at just over a pound, coupled with multiple ports, makes it easy to hang or carry, though its efficiency can drop in very hot conditions, and it’s less suited for charging high-power electronics.
Pros:- High solar conversion rate of up to 24%
- Waterproof and durable ETFE surface for outdoor durability
- Lightweight and portable with multiple hanging options
Cons:- Efficiency can decrease in extreme heat
- Limited to small devices; not for high-power electronics
Best for: Campers and outdoor users needing quick, reliable charging for phones and tablets without bulk.
Not ideal for: Those needing to power larger electronics or requiring fast charging in shaded or hot environments, as efficiency drops under such conditions.
- Power:20W
- Ports:USB-A, USB-C
- Weight:14.0 ounces
- Unfolded Size:26.3 x 8.5 x 0.1 inches
- Folded Size:8.7 x 8.5 x 1.2 inches
- Material:Monocrystalline cell, ETFE film
Our verdict“Suitable for outdoor users seeking a portable solution for small device charging without bulk.”
FlexSolar 40W Foldable Solar Panel Charger with USB-C, USB-A & DC Outputs
The FlexSolar 40W offers a significant step up in power, with multiple outputs including USB-C, USB-A, and DC, making it more versatile than smaller panels like the 20W model. Its 24% efficiency and IP67 waterproof rating ensure it performs well under various outdoor conditions, although the junction box isn’t fully waterproof, necessitating caution in heavy rain. Its lightweight design makes it easy to carry, but performance can decrease in partial shade, and it’s still limited to small electronics, not suitable for larger devices or high-demand applications.
Pros:- High-efficiency 24% solar conversion rate
- Multiple output options for various devices
- Weatherproof IP67 design for outdoor durability
Cons:- Junction box not fully waterproof, risk in very wet conditions
- Performance drops in shaded or cloudy environments
Best for: Outdoor enthusiasts and preppers needing a reliable, versatile panel for multiple small devices and emergency use.
Not ideal for: Users expecting to power larger electronics or needing a fully waterproof junction box for extreme weather conditions.
- Power:40W
- Ports:USB-C, USB-A, DC
- Weight:1.76 lbs
- Dimensions:8.0 x 11.1 x 1.8 inches
- Efficiency:24%
- Waterproof Rating:IP67
Our verdict“This panel is perfect for those who want a portable, multi-output charger with weather resistance for outdoor use.”
60W Portable Foldable Solar Panel Charger with USB-C, USB-A, and DC Outputs
The 60W foldable panel is the most powerful on this list, ideal for users who need more juice outdoors, such as camping families or small off-grid setups. It features three versatile ports, high 23% efficiency, and water resistance, although the junction box isn’t fully waterproof, and performance can decline in shade or with less direct sunlight. Compared with the 40W model, it offers more power but adds weight and size, so it’s better suited for those with a little extra space and weight capacity in their gear.
Pros:- High power output of 60W for faster charging
- Multiple ports support diverse devices
- Water-resistant and durable for outdoor use
Cons:- Heavier and larger than smaller panels
- Limited waterproofing on junction box, caution in rain
Best for: Campers and small off-grid users requiring higher power, multiple device charging, and robust outdoor durability.
Not ideal for: Lightweight backpackers or users needing maximum portability, as the 60W panel is bulkier and heavier.
- Maximum Power:60W
- Maximum Voltage:18V
- Item Dimensions:14″L x 9.8″W x 1″H
- Folded Size:9.8″ x 14″ x 1″
- Item Weight:2 kg
- Water Resistance:IP67
Our verdict“This panel delivers the highest power for outdoor use, suitable for users with space and weight allowances seeking fast, multiple device charging.”
Marbero Portable 30W Foldable Solar Panel Charger with USB & DC Ports, Waterproof, High Efficiency
The Marbero 30W strikes a balance between size, power, and versatility, with high efficiency arrays and multiple output options including USB-C and QC3.0 USB, making it suitable for camping, hiking, and emergency use. Its foldable design and IP67 waterproof rating allow it to perform well in cloudy weather and light rain, outperforming smaller panels like the 10W model in terms of power and reliability. However, it cannot store electricity and depends entirely on sunlight, which can cause fluctuations in output depending on weather conditions.
Pros:- High efficiency solar arrays with smart charging
- Multiple output ports including USB-C and QC3.0 USB
- Weatherproof design suitable for outdoor conditions
Cons:- Cannot store energy; dependent on sunlight
- Output varies with weather and angle of sunlight
Best for: Hikers and campers needing a reliable, versatile panel that works well in variable weather conditions and can charge multiple device types.
Not ideal for: Power users needing to charge larger electronics or those with no access to direct sunlight, since it only generates power when exposed to sunlight.
- Efficiency:23%
- Amperage Capacity:3 A
- Maximum Voltage:18 V
- Maximum Power:30 W
- Item Dimensions:8.86 x 1.77 x 11.97 inches
- Folded Size:11.6 x 8.85 x 1.75 inches
- Material:Aluminum, ETFE, Monocrystalline Silicon
Our verdict“This is a reliable all-rounder for outdoor users who need versatile, weather-resistant device charging in variable conditions.”
Solarapex 200W Portable Foldable Solar Panel with ETFE Coating
This 200W solar panel stands out for its high efficiency of 23.5% and robust waterproof ETFE coating, making it well-suited for demanding outdoor conditions. Compared to lighter options like the FlexSolar 100W, it offers more power—ideal for users needing reliable energy on longer trips or with higher power demands. Its foldable design with adjustable kickstands makes setup straightforward, though at 16 lbs, it’s heavier than many portable panels. The multiple ports, including fast Type-C charging, add versatility for various devices, yet its weight and size mean it’s less suitable for minimalist hikers or those prioritizing ultra-light gear. This pick makes the most sense for campers and RV travelers who value power capacity and durability over portability.
Pros:- High energy conversion efficiency of 23.5%
- Durable ETFE coating with waterproof IP67 rating
- Foldable with adjustable kickstands for flexible setup
- Multiple fast-charging USB ports including Type-C
Cons:- Relatively heavy at 16 lbs, impacting portability
- Requires setup and adjustment for optimal performance
- Limited to 200W output, less than larger grid-tied panels
Best for: Outdoor enthusiasts and RV users who need high wattage and durable performance
Not ideal for: Hikers or backpackers seeking ultralight, compact options for short-term use
- Power:200W
- Efficiency:23.5%
- Weight:16 lbs
- Waterproof Rating:IP67
- Cable Length:96 inches
- Ports:USB-A, USB-B, Type-C
- Warranty:12 months
Our verdict“This panel works best for those who prioritize power and durability over weight and compactness, such as RV travelers and dedicated campers.”
FlexSolar 100W Foldable Portable Solar Panel Charger IP67 Waterproof
The FlexSolar 100W panel is a standout for its lightweight design—only 4.1 lbs—and its high-efficiency monocrystalline cells, making it suitable for hiking, camping, and outdoor adventures where weight matters. Unlike the heavier Solarapex, this model folds down to a compact size, yet still provides multiple output options including PD 3.0 USB-C and 100W DC, offering broader compatibility with modern devices and power stations. Its IP67 waterproof rating ensures durability in rain or dust, which surpasses some less protected competitors. However, its relatively large unfolded size may be cumbersome for those with limited space or minimal pack capacity, and it requires compatible devices or power stations to utilize full output potential. This model makes the most sense for trekkers and backpackers seeking a balance of portability and multiple charging options.
Pros:- Lightweight and highly portable at only 4.1 lbs
- High-efficiency monocrystalline technology for faster charging
- Multiple output options including USB-C and DC
- IP67 waterproof and dustproof for all-weather resilience
Cons:- Unfolded size can be bulky for small backpacks
- Needs compatible power stations or devices for full use
- Limited to 100W, less power for high-demand devices
Best for: Hikers and outdoor enthusiasts who need a lightweight, versatile solar solution
Not ideal for: Users requiring high wattage for heavy appliances or extended off-grid power needs
- Power:100W
- Weight:4.1 lbs
- Dimensions (folded):12.99 x 10.43 x 2.17 inches
- Dimensions (unfolded):45.47 x 26.18 inches
- Output Ports:PD 3.0 45W USB-C, 18W USB-A, 100W DC
- Waterproof Standard:IP67
Our verdict“This panel offers a solid mix of portability and versatile charging for backpackers and outdoor lovers who prioritize weight and convenience.”
How We Picked
These products were evaluated based on a combination of power output, build quality, portability, and USB versatility. Priority was given to models that offer a good balance of size and efficiency, especially for outdoor activities like camping and off-grid use. Durability and water resistance were key factors, ensuring the panels can withstand challenging weather conditions. We also considered user convenience, such as the number and type of USB ports, ease of setup, and overall value. The ranking reflects a blend of these factors, favoring panels that deliver reliable performance without unnecessary bulk or cost.Factors to Consider When Choosing Foldable Solar Panel Usb Output
Choosing the right foldable solar panel with USB output depends on understanding your specific needs and the tradeoffs involved. Consider how portable you need the panel to be, how much power your devices require, and the environments where you’ll use it. Beyond the specs, practical features like waterproofing, ease of use, and compatibility with your gear matter just as much. Here’s what to keep in mind before making your purchase.Power Output and Device Compatibility
Understanding the wattage of a foldable solar panel is key to ensuring it can charge your devices effectively. Higher wattage panels typically provide faster charging and can support multiple devices simultaneously. Check if the panel’s USB ports support fast charging standards, and verify compatibility with your devices, especially if you rely on USB-C power delivery. Remember that a panel’s real-world output depends on sunlight conditions, so selecting a slightly higher wattage than your minimum needs offers more flexibility.
Portability and Size
Size and weight are major factors influencing how easily you can carry and deploy your solar panel. Compact panels are ideal for backpackers and travelers, but often have lower power outputs. Larger, higher-wattage panels tend to be bulkier, making them suited for car camping or emergency kits. Consider where you’ll use the panel most often, and balance size with your power requirements. Folding design and lightweight construction can make a significant difference in daily convenience.
Durability and Weather Resistance
Outdoor durability is non-negotiable for long-term use. Look for panels with waterproof ratings such as IP67 or higher, which protect against rain, splashes, and dust. Material quality, such as ETFE coatings or rugged plastics, prolongs lifespan and maintains efficiency over time. Avoid panels with flimsy hinges or cheap materials that can break or degrade quickly, especially if you’ll leave the panel exposed in variable weather conditions.
Ease of Use and Setup
The best panels are intuitive to unfold, position, and connect. Features like integrated stands or adjustable angles can maximize sunlight exposure without hassle. USB ports should be straightforward to access and compatible with various device cables. A panel with a built-in charging indicator or smart circuitry can help monitor performance and prevent overcharging. Remember, ease of use makes a real difference during outdoor excursions where convenience is critical.
Price and Value
Price varies based on capacity, build quality, and features. While higher-priced models often deliver better durability and faster charging, they aren’t always necessary for casual users or emergency backups. Conversely, very cheap panels may underperform or lack weather resistance. Consider your budget and how frequently you’ll use the panel; investing a bit more can pay off in reliability and longevity, especially if you plan to rely on it regularly.
Frequently Asked Questions
Can a foldable solar panel fully charge my phone overnight?
Most foldable solar panels rely on sunlight to generate power, so charging your phone overnight isn’t possible unless you have stored energy, such as in a power bank. If your panel supports USB output and you pair it with an external battery, you can store energy during the day and charge your devices later. It’s important to match your power bank capacity with your device needs to ensure steady power supply without draining your battery quickly.
Are waterproof foldable solar panels reliable in heavy rain?
Waterproof ratings like IP67 indicate a panel can withstand heavy rain and dust, making them suitable for outdoor use in adverse weather. However, prolonged exposure to extreme conditions or submersion can still cause damage over time. Always check the specific waterproof standard and ensure the panel’s seals and materials are high quality. Regular maintenance and careful storage after use can extend the panel’s lifespan and maintain its performance.
What size panel is best for backpacking and lightweight camping?
For backpackers, a compact and lightweight panel around 10-20W is usually ideal, balancing portability with sufficient power for small devices. Panels like the FlexSolar 10W or similar models fit easily into a backpack without adding much weight. Keep in mind that lower wattage panels may charge devices more slowly or require longer exposure to sunlight, so consider your typical energy needs and trip duration when choosing a size.
Do I need special cables or adapters for USB-C charging?
Many foldable solar panels come with standard USB-A ports, but if you want to charge devices via USB-C, check whether the panel includes a USB-C port or supports Power Delivery (PD). Some models may require a compatible cable or adapter to deliver fast charging. Using the right cable ensures your device charges safely and efficiently, especially if it supports fast-charging protocols. Always verify compatibility before purchase to avoid needing additional accessories.
Is it worth paying more for a higher wattage foldable solar panel?
Investing in a higher wattage panel makes sense if you have multiple devices or need faster charging, especially during limited sunlight hours. Higher wattage panels often include more USB ports and better build quality, providing greater reliability and versatility. However, they tend to be larger and more expensive, so consider your primary use case. For occasional or emergency use, a smaller, less costly panel may suffice, but for regular off-grid power, the investment can be worthwhile.
Conclusion
For casual campers and occasional use, the FlexSolar 10W offers a compact, affordable solution that still provides reliable USB charging. If durability and higher power are needed, the SOLUPUP 30W Portable Foldable Solar Charger delivers a balanced mix of ruggedness and performance. The BigBlue 28W Solar Panel stands out for users seeking fast charging and multiple ports.Those venturing into more serious off-grid adventures or needing to charge multiple devices efficiently may find the FlexSolar 40W or 100W models better suited. For first-timers or light travelers, simplicity and weight are key, making smaller panels the most practical. Ultimately, choosing the right panel depends on your specific power needs, portability preferences, and budget constraints.
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