Awards Editors' Choice Award  Best Buy Award Top Pick Award Best Buy Award 
Price $71.96 at Amazon$69.99 at Amazon$31.27 at Amazon$190 List$39.99 at Amazon
Overall Score Sort Icon
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Pros Inexpensive, efficient, user-friendly, excels in partly cloudy conditionsEfficient, powerful, great value for its size, lightweightQuick to charge, portable size, panel actually works despite small wattageDurable, well-designed, fast charging timesInexpensive, lightweight, portable, charges quickly
Cons Bulky, heaviest weightPocket too small to hold extra cords and accessoriesHeavy, slow to replenish battery via solarExpensive, bulkyLow output power, cannot charge multiple devices at once
Bottom Line For an inexpensive, easy-to-use and efficient panel, the BigBlue is a no-brainerThis panel is efficient in varying conditions and can charge multiple devicesFor a small battery pack with solar capabilities, this is an impressive productProvides quick charge times, a durable design, and a roomy mesh pocketThis lightweight 13W panel is able to deliver a steady charge to a single device, but lacks in its ability to charge multiple devices at once
Rating Categories BigBlue 28W Anker PowerPort 21W Goertek 25,000mAh SunJack 25W ECEEN 13W
Charging Speed (30%)
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8
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9
8
Charge Interruption Recovery (20%)
9
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8
7
6
Multiple Device Charging Speed (20%)
9
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9
4
Weight & Portability (20%)
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Durability (10%)
7
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8
Specs BigBlue 28W Anker PowerPort 21W Goertek 25,000mAh SunJack 25W ECEEN 13W
Panel Size (watts) 28W 21W 5W 25W 13W
Weight (measured) 23.5 oz 17.6 oz 19 oz 30.1 oz 12 oz
# of USB outlets 2 2 3 2 2
Max USB Output Current (amps per port) 2 amp 2 amp 1 amp 2 amp 2 amp
Battery kit? No No Yes Yes No
Size folded 11.1" x 6.3" x 1.3" 11" x 6.3" x .75" 7" x 3.75" x 1.25" 12.6" x 7.8" x .8" 11.4" x 6.1" x 0.6"
Battery? No No Yes Yes No
Charge tablet? Yes Yes No Yes Yes
Charge laptop? Yes Yes No Yes No
Panel Type PET Polymer Mono-crystalline Mono-crystalline ETFE Mono-crystalline
Size opened 33.1" x 11.1" x 0.2" 26.3" x 11.1" x 0.2" 7" x 3.75" x 1.25" 24.6" x 7.8" x .8" 11.4" x 14.3 x .15"
Battery input (Volts / Amps) N/a N/a 5V 2A 5V 2A N/a
Charge capacity (mAh) N/a N/a 25,000mAh 10,000mAh (x2) N/a
Charge iPhone/smartphone Yes Yes Yes Yes Yes
Direct USB Plug? Yes Yes Yes Yes Yes
Daisy Chain? No No No Yes No
12-Volt connection No No No Yes No
Warranty 2 years 18 months 1 year 1 year 30 day return
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