Will be testing one of these soon, with a view to eventually powering my shed with them, this is a great price, typically you pay £70-80 for a 100W cell so i'm not expecting great performance but you never know!
I copied this from the specs
Vpmax:18V
Power: 100W
Ipmax: 2.77A
Output: 5V/18V
18v * 2.77A = 49.86 watts if my calculator is correct.
...R
Probably 100w at 5 volts...
Qdeathstar:
Probably 100w at 5 volts...
I presume that's a joke
...R
100/(0.2800.6621368) = 39.4% efficient
The highest efficiency solar panels can reach almost 23 percent efficiency.
Someone is lying. And it's a whopper. I suspect I know who.
Robin2:
I copied this from the specs
18v * 2.77A = 49.86 watts if my calculator is correct....R
Note to self - must stop believing ads and read the details!
Hi,
From this site;
Solar panels are given a power rating in Watts, based on the amount of electricity they can produce in one hour of peak sunlight. However, these ratings are classified under ideal conditions in a laboratory, and therefore don’t represent the amount of power that could be expected of that panel on a day-to-day basis. So a 250W panel installed on a household rooftop, is not going to produce 250 Watts of electricity, even in peak sun.
Tom.... 
Hi,
You have to do a load test to find Maximum Power Point.
Tom...
The figures I used in Reply #1 claim to be the voltage and current at the max power point.
...R