Graduate / How to 'neutralize' my multifield experience? - issues regarding my SOP [5]

hi all,

i have done graduation in mechanical engineering with honors (%age : 79%)...my term projects were detailed study of solar energy ,wind energy ,geothermal energy, and final year project was design calculations of 25MW fluidized bed combustion steam boiler...now i have been doing job as structural analysis engineer since last 1.5year in automotive sector....

as i have heard and seen also that if one has research/job experience in a same field during his whole career including educational period then SOP gets good response,otherwise professors dont consider those SOPs which include such random areas of expertise and not a focused one.

,actually i want to apply for a masters scholarship and now i m mainly interested in renewable energy resources , power plants, energy efficiency.

so how should i write my SOP so that even after reading my multi-field experience ,professor award me a good scholarship.

Regards