Portable renewable energy apparatus

A renewable energy power conversion apparatus 2 comprises telescopic upper and lower tower sections 6, 4, the upper tower section 6 supporting a device which harnesses a renewable energy source. Vertical movement of the upper tower section 6 with respect to the lower tower section 4 actuates deployment and retraction of the energy harnessing device. The device may be a wind turbine and vertical movement of the upper tower section 6 may deploy and retract the turbine rotor blades 26. The upper tower section 6 may be telescopic with a drive shaft of the lower tower section 4, the drive shaft being connected to an alternator 10. Additionally, or alternatively, the device may include solar panels.