Sewage and rubbish stations: PV generation systems
are usually used to supply the power. If the wind energy is
available, the wind energy generation system or the solar
wind hybrid system can also be joined. To turns down the
investment of electricity networks, the gird-off PV
generation system, grid-off wind energy generation system
or grid-off solar wind hybrid generation system should be
selected as soon as possible. Only the scenic spots in cities
should be taken the grid-connected generation system
because there are more domestic sewage and more
domestic garbage.