SolarDraft (also written as Solar Draft) and PVsyst get compared often, but they solve different problems. PVsyst is Swiss-developed, engineering-grade software used worldwide for detailed photovoltaic energy-yield simulation — grid-connected, standalone and pumping systems — with meteorological data import, loss analysis and 3D visualization for large installations. SolarDraft is a web-based sales platform for solar EPCs: 3D rooftop design, subsidy-ready proposals and a CRM, built to move a lead to a signed deal quickly.
At a glance
| SolarDraft | PVsyst | |
|---|---|---|
| Category | Sales, design & CRM platform for EPCs | Desktop PV energy-yield simulation software |
| Best for | Fast proposals, subsidy calculation, lead tracking | Detailed technical yield and loss modeling |
| Typical user | Sales teams and EPC owners | Design engineers and technical consultants |
| Output | Client-ready 3D proposal with pricing | Engineering simulation report with loss breakdowns |
| Platform | Web-based, works on mobile | Desktop application |
Key features — SolarDraft
- Generates a branded, subsidy-ready proposal in minutes.
- Built-in CRM to track the deal after the proposal goes out.
- Simple enough for a sales rep to use on a site visit.
Key features — PVsyst (per public information)
- Detailed loss analysis, including soiling and snow modeling.
- Imports sub-hourly meteorological data for high-accuracy yield estimates.
- Used widely for utility-scale and technically complex project validation.
"These aren't really competitors — SolarDraft helps you win the deal fast; PVsyst helps you validate the engineering in technical detail on larger projects."
Many EPCs don't have to pick one: smaller rooftop and C&I deals typically move faster with SolarDraft's proposal-first workflow, while larger or technically complex projects may still warrant a PVsyst simulation alongside it for engineering sign-off.