SolarLayoutSolarLayout
SolarLayout Rooftop

From a roof on the map to a complete PV design — in your browser.

Find the building, outline the roof and its obstacles, and lay out the modules. String them to your inverter, see the shade through the year and simulate every hour of it — then hand over the report, single-line diagram, bill of materials and drawings.

Open Rooftop

Runs in your browser · phone, tablet or computer · free, no account needed

Built forRooftop installersC&I solar EPCsDesign consultantsSales engineers
A flat roof designed in SolarLayout Rooftop, in 3D: its modules coloured by the inverter input they are wired to
How it works

From address to deliverable.

01

Find the roof

Search an address or coordinates, then outline the roof on satellite imagery or by hand. Add obstacles with their heights.

02

Lay out the array

Choose the roof type, the module, the mounting and the spacing. The layout keeps clear of the shade of the day you design for.

03

String and simulate

Set the inverter; compare stringing options by DC/AC and energy. Every hour of a typical year is simulated.

04

Hand over

Design report, single-line diagram, bill of materials, cable schedule, DXF, KMZ and the hourly data.

See it work

Real output, straight from the app.

Not mockups — these are the app's own screens, on a 3,600 m² demo roof in Pune.

Strings on the roof
SolarLayout Rooftop's Strings lens: a flat roof in 3D with its modules coloured by MPPT, and the stringing options beside it
The layout in 3D, each module coloured by the inverter input it is wired to, with the stringing options compared beside it.
Sun and shade
The Sun lens: the sun's path over the roof on the design day, shadows at 10:30, and shading over the year
The sun's path on the design day, shadows at any hour, and the shading each module loses over the year.
Energy over the year
Performance: energy in year one, P50, P75 and P90, the losses from sunlight to the grid, and energy by month
Every hour of a typical year, from sunlight to the grid, each loss named — with P50, P75 and P90.
Handover
Handover: the list of files to hand over and the design report's first page
Report, single-line diagram, bill of materials, cable schedule, CAD and Google Earth files — each previewed, then downloaded.
Capabilities

Everything a rooftop solar design needs.

Find and outline

Search an address or coordinates; outline the roof on satellite imagery, detect the building, or enter it by hand.

Obstacles with heights

Tanks, stair rooms, walls and trees, each with its height, so their shadows stay off the modules.

Three roof types

Flat with tilted rows, flat east-west, or sloped and flush — each laid out its own way.

Your equipment

Modules and inverters from a library of PAN and OND files, or the files of your own.

Sun and shading

Sun path, shadows at any hour of any day, and a shade map of every module over the year.

Stringing options

The series range from your system voltage; options compared by DC/AC, clipping and energy — or your own.

Energy yield (P50 / 75 / 90)

8,760-hour simulation on PVGIS weather or your own CSV, with the full loss chain.

Report · SLD · BOM · DXF · KMZ

Hand-off-ready files, one by one or in one zip, plus the hourly data.

Any device

Phone, tablet or computer; add it to your home screen. Your designs stay on your device.

Design your next rooftop solar project — free.

Open it in your browser and lay out your first roof today.

Open Rooftop

Runs in your browser · phone, tablet or computer · free, no account needed

Designing a utility-scale plant? Explore SolarLayout Desktop