I purchased 4 of these panels a little over a year ago and they have been performing great. I connected them to a cheap 1000W grid-tied inverter (also sold on eBay). I consistently get 80-90% of rated power (540W to 610W as measured by my Kill-A-Watt meter) depending on the season. The panels were rated at 170W when I purchased them and are now 175W in the exact same package... most likely due to a slightly more efficient crystalline structure.
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BLADE 230 S BNF w/SAFE Tech Electric RC Helicopter BLH1580 CP
May 11, 2016
LOVE IT!!!
This is an excellent little heli for flying in smaller spaces. I have been using it to advance my flying skills right in my own back yard where a larger heli is not practical.
I have noticed it could use a little more power when pushed hard but at my flying level (inverted, flips, rolls, beginner 3D stuff) it is absolutely a blast to fly.
It is also an excellent first collective pitch machine for beginners due to its very docile handling characteristics in "Normal" mode where pitch and bank angles are limited to about 25 or 30 degrees.
Combine that with relatively inexpensive crash repair bills and it is hard to go wrong with this heli.