Wind turbine V3

EDIT: V4 available NOW ! ;)

I've build this turbine with the objective to produce electricity to charge small devices like smartphone or powering a led strip.
I can't use solar panel because my balcony is lit by the sun 4 hours per day. But luckily for me, i live near the sea and there is constant wind day and night which coming with the tide, so i decided that building a wind turbine can be a good alternative.

https://www.youtube.com/watch?v=v8p_QvocnHA

Until now it's a good base where to start. Any advice is good to take.

This wind turbine starts with wind speed of 3m/s (approx .10km/h) with no load.
The measured torque on the shaft is approximately 0.25N.m at 20km/h wind. I think is sufficient to move a DC motor to produce some electricity but it will increase the wind speed at which the turbine starts.

I'am still working to store produced electricity in a 12V battery and restore it in a load. Of course this part is the most difficult of the project...

I've use Acrylic to make the blades, not for aesthetics purpose (even if it's looks great :)) but because my 3D printer can't print so large parts (Microdelta Rework, printable dimensions: Cylinder 150mm base, 200mm high).

Tools:

• Scewdriver (Pozidriv or Phillips depending on M4 screw)
• Dremel (only if the blades are cut directly in acrylic)
• Saw to cut threaded rod or you can use Dremel

Components :

• 1.5mm Clear Acrylic Plastic Sheet, size A2

• Cyanolit Koltout Express, double-Sided adhesive,(only needed if blades are made of acrylic)

• 4 Generic ball bearing 28x12x8 (choose IGUS BB-6001-B180-30-ES if possible but they are really expensive)

• Threaded Rod, M6, 3 meter

• Threaded Rod, M10, 1 meter

• M6 Nylon-insert lock nut -> qty 10
• M6 Nut -> qty 20

• M6 Washer -> qty 20

• M4x40 "Poelier" type Screw -> qty 10

• M4 nut -> qty 10
• M10 Nylon-insert lock nut -> qty 1
• M10 Nut -> qty 20
• M10 Washer -> qty 20

Printed with in ABS from E-motion tech 1.75mm, 250°C

Enjoy ;)

PS : Sorry for my english...