I will create solar and heat pump planing on reonic

In this gig you will get a 2D site plan that included solar arrays on various roofs

If you do not have any costly solar software you can still get same PV layout like Aurora solar and other software

I will also tell you about annual yield with following formula

Annual yield formula: E= A*r*H*PR*365

E= Energy (kWh generated Annually)       A= Total panel area in m^2

H= Annual average irradiance on tilted panels  (GHI)(shading not included)

PR= Performance ratio, coefficient losses

You will also get shading analysis for each array in excel file.