Since we have a lot of wind here in Karnataka I had the idea to use it to generate some electricity. This is easyer said than done. First thing to do is transforming the idea into a feasible plan.
First I had to deciced what i want to do. The options are:
- Charge a battery from the wind turbine and optionally use an off-grid inverter.
- Use an on-grid inverter.
- Do both.
Option 1 was not good because I don’t have the batteries needed and organizing the ones I want needs too much time. I haven’t found ready-made systems for option 3. So 2 was the one to go. The disadvantage is that when there is a power outage all the generated electricity is wasted using the brake resistor.
So I need the following parts:
- Wind turbine.
- Generator, usually integrated with the turbine.
- Wind turbine controller.
- Brake resistor.
- On-grid inverter.
I found a nice 400W turbine with integrated generator, maximum output power of 600W, and a nice wind turbine controller with integrated on-grid inverter. So now this just needs to be assembled to a working system.
The system seems to work fine. When we have quite some wind the controllers green LEDs flash which seems to indicate that some electricity is produced. It needs considerable wind to start up. So far I’ve seen it running a few times, but also standing still quite often. I have the feeling that we have more wind in the summer than now. I’ll see in summer if it is true. Another thing I’d like to have is a power meter which records how much electricity has been produced. I’ll try later to find out by measuring the 220VAC ouput current using my multimeter.