Due to the environmental issues and other terms stated earlier,
using the diesel engine generator set should be avoided as much as
possible. It means that system number three and four with diesel
generator set as a backup system have lower priority than the first
and the second configurations. System number one has lower
biogas consumption and a smaller battery bank compared to the
system number two. The variety of using different types of local
energy sources might be considered as an advantage for a hybrid
system. In system number one, energy is extracted from three types
of energy sources (Wind, Solar and Biogas) and has priority to the
system number two in which energy is extracted from two types of
local energy sources (Solar and biogas).