PV-windmill hybrid system

The PV-Windmill hybrid system is an energy supplier device. It contains 25 monocrystalline modules, a small windmill and 27 lead-acid batteries. This equipment and other electronics (inverter- to make AC from DC electricity) are packed in a container. That is why the installation of the system is relatively easy. This container can be established at rural areas to cover the energy demands. This system can supply electricity into a local grid or it can function as a battery charger station. The batteries compensate the difference between the current energy production and the current energy consumption if the system works as a kind of renewable power plant feeding electricity into a local grid.
This combination of renewable energy sources is really useful because these devices complement each other. For example in Europe the summer is sunny but during the winter the sky is usually overcast, and the wind is stronger. In Africa after sunset the wind begins to blow, and during the daytime the sun is shining heavily.

The hybrid solar-wind system can produce 10 kWh per day on average or 3600 kWh annually.

 
Technical details

The system contains the FC4000 PMG windmill with 1.5 kW output. The rotor area is 12m2 . The PV array is built up from 25 monocrystalline modules made by Solel in Denmark. The PV cells efficiency is 13%. The total output is 1250 W at 25 oC and at 1000W/m2 solar radiation. The array territory is 12m2 . Open circuit voltage is 525 V. The 27 lead-acid batteries supply 336V.

Operation

If the weather is sunny enough, the solar array produce DC electricity which can be used to charge batteries or after inverting to AC electricity it can be used by AC loads (lamps, television, computer etc). When the windmill operates it produces AC electricity which can be used by AC loads or after inverting to DC electricity it can be used to charge batteries.