However, the specific specie that suits best as energy crop is Pakchong 1, harvestable 5-6 times a year and yield as much as 50-100 tons/year/rai, for Estimated as 80-90 tons/year/rai. Its nutrition structure fits for microbe to grow and generate methane gas. Napier grass can generate bio gas generation. In the anaerobic digestion process will result in bio gas. One metric ton of Napier Grass can generate 80-120 cubic meters assume as cubic meters of biogas, convertible in to 150-240 kwh/day assume as 170 kwh/day electricity. (As capacity 7 kw operate 24 hours a day)