Rank #1 #10 #11 #5 #3
Product
X-Dragon 20W
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Instapark Mercury 10
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Awards  Editors' Choice Award        Best Buy Award 
Price $47 List$46.72 at Amazon$58.99 at Amazon$39.99 at Amazon$37.95 at Amazon
Overall Score
100
0
72
100
0
60
100
0
59
100
0
66
100
0
68
Star Rating
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Pros Efficient, powerful, dual USB ports, large storage pocketDurable, straightforward, simple & unique designDurable, affordable, internal battery helps charge interruption recoveryCompact, charges devices efficiently when battery is fullLight, inexpensive, simple, can charge two devices at once
Cons Heavy, difficulties charging multiple devicesLacks storage pocket, single USB portBattery could be unreliable, only one USB port, heavyBattery slow to charge, solar cells cover small area, heavyLow capacity, bulky, heavy
Bottom Line This 20W panel is one of the most powerful panels we tested; on the flip side, it is also one of the heaviest.The Renogy 10W is a durable, hard-sided, collapsible panel that performed well overall in our metric ratings.The BoostCel 12W is the best integrated battery/panel combo we have tested.The 24000mAh is a powerful battery pack with a small solar panel on it; this design means that it can charge electronics efficiently but is slow to charge anything strictly using solar power.For an inexpensive 10W panel, the Mercury 10W charges devices reliably and effectively, making it our pick for Best Buy.
Ratings by Category X-Dragon 20W E.Flex10 BoostCel 12W BERNET 24000mAh Mercury 10W
Charge Interruption Recovery - 20%
10
0
8
10
0
5
10
0
7
10
0
7
10
0
8
Charging Speed - 30%  
10
0
9
10
0
8
10
0
8
10
0
8
10
0
8
Multiple Device Charging Speed - 20%
10
0
4
10
0
2
10
0
2
10
0
7
10
0
5
Weight & Portability - 20%
10
0
7
10
0
7
10
0
5
10
0
4
10
0
5
Durability - 10%
10
0
7
10
0
8
10
0
7
10
0
6
10
0
8
Specs X-Dragon 20W E.Flex10 BoostCel 12W BERNET 24000mAh Mercury 10W
Battery kit? No No yes Yes Yes
Weight (measured) 16.6 oz 12.2oz 21.5oz 17.1oz 18 oz
Panel Size (watts) 20W 10W 12W 10W 10W
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