The analysis term is the number of years that are used in the calculations.  Some projects look better with a 5 year analysis term and others may be better with a 10 year analysis term.  

Change the analysis term in the Project Settings menu.
Change the default analysis term in your Profile. 

Hint:
In the LightBids analysis, the proposed equipment can burn out too.  If your maintenance savings is negative, the proposed equipment is probably burning out.  Try using a shorter analysis term to see if the maintenance savings value improve. 

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