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Renogy E.Flex5
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Read the Review
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Awards Editors' Choice Award Top Pick Award    
Price $59.99 at Amazon$24.99 at Amazon$54.99 at Amazon$69.99 at Amazon$160 List
Overall Score
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82
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66
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59
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61
100
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68
Star Rating
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Pros Inexpensive, efficient, user-friendly, excels in partly cloudy conditionsInexpensive, lightweight, simple designDurable, affordable, internal battery helps charge interruption recoveryFairly efficient, reasonably priced, durableEfficient for its size, durable, rigid design makes it easy to prop up, designed and built in the US
Cons Bulky, heaviest weightNo pocket, no protective cover for panels, single USB portBattery could be unreliable, only one USB port, heavyHeavy, lacks portabilityExpensive, large, hard to transport, lacks storage pocket
Bottom Line We were impressed by the BigBlue's ability to charge our gadgets quickly and reliably; its reasonable price is the cherry on top.The 5W is a unique, durable, incredibly lightweight panel, great for small charging tasks.The BoostCel 12W is the best integrated battery/panel combo we have tested.The Wildtek 21W excels in charging efficiency, but fell short overall due to its size and weight.For a rigid, efficient panel that is well-made and reliable, look no further than the 14W from Suntactics.
Rating Categories BigBlue 28W Renogy E.Flex5 BoostCel 12W Wildtek Source 21W S-Charger 14
Charge Interruption Recovery (20%)
10
0
9
10
0
5
10
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7
10
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6
10
0
8
Charging Speed (30%)  
10
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9
10
0
8
10
0
8
10
0
8
10
0
8
Multiple Device Charging Speed (20%)
10
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9
10
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2
10
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2
10
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4
10
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6
Weight & Portability (20%)
10
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6
10
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10
10
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5
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5
10
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4
Durability (10%)
10
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7
10
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8
10
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7
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7
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8
Specs BigBlue 28W Renogy E.Flex5 BoostCel 12W Wildtek Source 21W S-Charger 14
Battery kit? No No Yes No No
Weight (measured) 23.5 oz 6.1 oz 21.5 oz 26.5 oz 20.5 oz
# of USB outlets 2 1 1 2 2
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