However, the design, control, and optimization of the hybrid systems are usually very complex tasks; the stand-alone hybrid solar–diesel power generation system is recognized generally more suitable than systems that only have one energy source for supply of electricity to off-grid applications. A proposed PV system has been designed and optimized using HOMER software computer model to supply a potato cooled store in Kirkuk city in Iraq. The result obtained from the optimization gives the cost of energy (COE) is 0.639 US$/kWh with 2axis trucking system and 0.692 US$/kWh with no trucking system. Energy cost is 0.796 US$/kWh when the load is supplied by the diesel generator alone.

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Renewable energy
Energy efficiency
CTCN Keyword Matches
Off-grid systems
Single cycle to combined cycle power generation