Once Napier grass is planted, it can be harvested at 3 feet tall (1m) for biogas production after 40 days, at average 80-120 M3 depend on the technology of fermentation and subsequent harvests are every 25 to 30 days. Biogas from Napier grass can produce the electricity around 150-240 (KW/day).for other application such as pellets or biofuels, it is harvested at 13 feet tall (4m) after 195 days and subsequently every 120 days. The high rate of growth of giant king grass can provide a continual supply of biomass year-round.