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HOMER Pro 3.13

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Because the grid is unlike any other Component, HOMER calculates the costs associated with the grid in a unique way. The grid cost output calculations are described below.

Grid Capital Cost

If the system is connected to the grid and contains some other power producing device (such as a microturbine, fuel cell, PV array, or wind turbine), the grid capital cost is equal to the interconnection charge. Otherwise, the grid capital cost is zero.

Grid Replacement Cost

The replacement cost of the grid is always zero.

Grid O&M Cost

The grid O&M cost is equal to the annual cost of buying electricity from the grid (energy cost plus demand cost) minus any income from the sale of electricity to the grid. For grid-connected systems that contain some other power producing device (such as a microturbine, fuel cell, PV array, or wind turbine), the grid O&M cost also includes the grid standby charge.

Grid Fuel Cost

The fuel cost of the grid is always zero.

See also

Capital Recovery Factor

Grid Interconnection Charge

Grid Standby Charge

Project Lifetime