Are there any electrical design and shading analysis tools that focus on 3D models and solar proposals?

Yes — there are several tools in that space, especially for solar PV design, 3D modeling, shading analysis, and proposal generation. The exact fit depends on whether you want roof-only residential design, commercial/utility-scale layouts, or electrical design plus sales proposals.

Common tools in this category

• Aurora Solar
  Strong for 3D roof modeling, shading analysis, production estimates, electrical design, and customer proposals.
• HelioScope
  Popular for commercial PV design; good for 3D layout, shading, and energy modeling.
• PV*SOL
  Well known for detailed system simulation, 3D shading analysis, and technical design.
• SolarEdge Designer
  Useful for designing systems around SolarEdge hardware, including layout and electrical configuration.
• PVsyst
  More engineering-focused; widely used for detailed performance simulation and shading studies.
• OpenSolar
  Free/low-cost proposal and design platform with 3D modeling and sales tools.
• NREL SAM
  More for modeling and analysis than proposal generation, but useful for performance and economics.

If you want “3D + proposal” specifically

The most common options are:

• Aurora Solar
• OpenSolar
• HelioScope (more design than sales)
• PV*SOL (more technical than sales)

If you want stronger electrical design

Look more at:

• PVsyst
• HelioScope
• PV*SOL
• SolarEdge Designer if you use their equipment

If you want, I can also give you a comparison table by price, ease of use, accuracy, and best use case.