I have used HOMER a couple of times. I wasn't, however, able to include the replacement cost.

HOMER does let you enter the replacement cost separately from the capital cost.  Each component has a cost table in which you specify the capital, replacement, and O&M cost.  In the example below, the wind turbine inputs window, I have specified an initial capital cost of $265,000, but a replacement cost of only $165,000.

Note that you can see a detailed breakdown of the costs of the system, separated by year, component, and cost type, by clicking Details on the Cash Flow tab of the Simulation Results window.  That’s the window that appears when you double click a system in the Optimization Results window.