The phenomenon of piezoelectricity has been applied in many fields, with one of the significant uses being energy harvesting. With increased usage of on-person devices and micro-electro-mechanical systems (MEMS), the requirement for powering these devices has also increased. Currently, conventional batteries are the main power source; however the parasitic weight, limited lifespan, and toxicity of batteries present serious concerns for users and environmentalists. One alternative power source could be incorporated into the garment using piezoelectric fibres - providing a continuous, green source of energy to the user. Here, we present a finite element analysis of an idealised polyvinylidene-fluoride (PVDF) wearable textile using the Representative Volume Element (RVE) approach. The RVE model consisted of PVDF fibres attached between flexible electrodes and exhibited a nonlinear increase in power ouput due to similar increase in number of fibres. A parametric analysis was then carried out on the effect of fibre angle, thickness, linear density, and poling directions on output power at lower frequencies (1 - 2 Hz), with the results discussed in the context of the intended fabric applications.