Skip to content
RE+ 2026 · Nov 16–19 · Las Vegas

See what replacing your entire software stack looks like. Booth W15826.

Book a booth demo
FeaturesDesign & proposals

Design on the real roof.
Sell, permit and build from it.

Model the roof from aerial imagery, place every panel and simulate a full year of production. The proposal takes its numbers from that model, and the signed design becomes the project your crew installs. On Pro, the single-line diagram and permit set are drawn from the same design.

Roof geometry, shading and per-panel output, all in the design workspace.
Start with the site

A model of the whole property.

Model pitched, flat and commercial roofs, ground mounts, carports and trackers in one 2D and 3D workspace. Assisted roof detection gets you started, and every plane, tree, obstruction, setback and property line stays editable by hand.

Start from Google HD or Bing imagery. Standard adds EagleView, and Pro adds Nearmap, TrueOrtho and your own drone surveys, wherever the provider has coverage. Your roofing team quotes from the same measured facets, eaves, ridges and valleys as the solar design.

PowerlilyStart with the site
Powerlily design workspace with roof geometry and panel layouts
One editable site model, from the first layout to the final design.
Test the design

See the effect of every panel.

Per-panel solar access and an 8,760-hour production simulation run on the same scene you draw in. Move a panel, add a tree or change the pitch, and the shade, clipping and annual output update with it.

String the array against the inverter’s voltage, current and power limits, temperature-corrected. Size storage against the customer’s usage and count the racking from the layout. Change the design and the quote updates instead of starting a second estimate.

PowerlilyTest the design
Solar exposure heatmap and array layout in the Powerlily design tool
Solar access on every roof plane, beside the array it affects.
Present and sign

Present the system you modeled.

Send a responsive Live Proposal, a Classic PDF or a Designed Proposal in your own layout. Proposal Presets give every rep the same starting point, and the equipment, production, options, incentives and financing come straight from the quote.

Deliver by email or text, see when it is opened and collect signatures through private signer links. Signed revisions preserve the proposal, terms and signing record before the project moves to install. Every signature carries its timestamp, device context and an evidence digest.

PowerlilyPresent and sign
Powerlily’s visual document editor with a branded solar proposal and project variables
A Designed Proposal in your brand, filled from the project.

Reports from the model

Open the reports it produces.

Three sample reports exported from a Powerlily design: measured roof edges, panel-level shade analysis and racking quantities counted from the layout.

On Pro, the same design continues into editable electrical drawings and coordinated permit sheets. When the queue is long, spend a credit instead: expert designs are available on every plan with a 24-hour turnaround, revisions included.

  • Roof report

    Classified eaves, ridges, hips, valleys and rakes, with facet measurements.

    Open sample PDF ↗
  • Shade report

    Panel-level solar access, TSRF and TOF for the proposed layout.

    Open sample PDF ↗
  • Racking bill of materials

    Rails, splices, attachments and clamps measured from the design.

    Open sample PDF ↗
Powerlily / Built with installers

Bring an address you have quoted.

We model it with you, then follow the proposal into the single-line diagram, the permit set and the invoice.

Pericles
Pericles
Powerlily assistant
Replies instantly. Leave your email anytime and a human follows up.