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Improving the efficiency of an economical wind generator

I experimented with a 100 euro generator, rated 500W but in reality it produces much less in normal wind, and in low winds (below 7.2 km/h = 2 m/s = 4.4 mph) it produces nothing.
From the measurements in low winds however are obtained 5V/7V in open circuit with a short-circuit current of around 1.5A, so there is some energy but, due to the low voltage, it does not clearly charge a 12V battery.

Wind Meteo Solar panel

What to do then?
I simply put a DC-DC step-up module, which starting from 4V is able to produce the necessary 14V, in this way even with weak winds a few watts can be extracted, which give their contribution over the course of 24 hours, especially considering that there is often more wind when it is cloudy and the solar panels produce little and sometimes it’s windy even at night.
A bypass diode between the input and output of the DC-DC excludes it in strong winds.

May, with average wind of 8.2 Km/h = 2.3 m/s = 5.1 mhp, peak 27.7 Km/h = 7.7 m/s = 17.2 mph, in one week recorded peak of 4.4A, 63W, generated 16Ah = 209Wh, on average 2.3Ah = 30Wh per day.

After 2 weeks, still peak 4.4A, 63W, generated 31Ah, 431Wh, on average 2.2Ah, 31Wh per day.

After 3 weeks, still peaking at 4.4A, 63W, generated 48Ah, 650Wh, on average 2.3Ah, 31Wh per day.

Mounted at a height of 7 metres, with the presence of trees a few tens of meters away, it performs like a 15W solar panel, not much, but it has the advantage of working without sun, even if in my area the wind is mainly during the day, it helps however to keep the batteries charged in bad weather.

I lengthened the tail rudder with a dibond panel for stability.

Model: Vevor FLFDJS500-12V5Y01
Blade number: 5
Blade material: Nylon fiber
Wind wheel diameter: 1.19m (3.9ft)
Rated power: 500W 12V
Maximum power: 510W
Initial wind speed: 2.0 m/s
Rated wind speed: 13 m/s
Safe wind speed: 50m/s
Magnetic material: Neodymium iron boron
Cabin material: Die-cast aluminum alloy
Generator: 3 Phase AC PMG
Wind direction adjustment: Automatic adjustment

Wind turbines on Amazon (sponsored)

Indicatore vento

Low tech wind indicator, with two small bearings, iron wire, recycled plastic and four suction cups, the fixed arrow indicates north, the plastic bell protects the bearing from rain.

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