Power Watch India - - GREEN AHEAD -

A por­tion of the in­com­ing so­lar ra­di­a­tion is ab­sorbed by the sur­face and a por­tion is also re­flected away. The pro­por­tion of light re­flected from a sur­face is the albedo. Pho­to­voltaics (PV) is a method of gen­er­at­ing elec­tri­cal power by con­vert­ing so­lar ra­di­a­tion into di­rect cur­rent elec­tric­ity us­ing semi­con­duc­tors that ex­hibit the pho­to­voltaic ef­fect. Pho­to­voltaic power gen­er­a­tion em­ploys so­lar pan­els or mod­ules.

So­lar PV Mod­ules are made up of PV Cells, which are most com­monly man­u­fac­tured from sil­i­con.

Pho­to­voltaic cells pri­mar­ily use vis­i­ble ra­di­a­tion. The dis­tri­bu­tion of colours within light is im­por­tant, be­cause a pho­to­voltaic cell will pro­duce dif­fer­ent amounts of cur­rent de­pend­ing on the var­i­ous colours re­flect­ing on it.

PV cells that form a PV mod­ule are con­nected in a se­ries to achieve a de­sired out­put volatge and/or par­al­lel to pro­vide de­sired cur­rent ca­pa­bil­ity. Th­ese PV mod­ules when con­nected in a se­ries and par­al­lel are called an ar­ray. So­lar Pho­tovotaic Sys­tem con­sists of var­i­ous so­lar mod­ules (con­nected in se­ries and par­al­lel), in­vert­ers (to con­vert DC Power to AC Power), mount­ing sruc­tures or track­ers, ca­bles and var­i­ous other com­po­nents.

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