Can someone please share solar pv project financials calculator (excel based) or any other software related to this

Are you looking for analyzing residential or commercial systems?

you can try quick quotes they seam to work well. Quick Quotes is web based

This for solar power plant (commerical)

Results of solar calculators are at their best only as good as their inputs. The key to a proper calculation is understanding of details that affect output and their volatility. You should also be very clear about expected precision of your results. On the other hand, going into too many technical details makes calculations costly to perform.
I suggest using RETScreen as a good compromise between precision and simplicity - a multi language, Excel-based free modeling software.

RETScreen is very good, it also shows IRR in a graph

I'm afraid retscreen shows only cash flow graph, but it does calculate major financial ratios.

U can talk to me.

Lalit Mogha
+91 9099002538

I use Energy Periscope for commercial installs. Nicely laid out and somewhat easy to use. Plus, the developer Scott Kronk is very responsive to questions and suggestions.