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Designs & Proposals

Draw it once. Sell it, sign it and permit it. From the same solar model.

Powerlily connects site intelligence, live 3D design, system engineering, proposals, e-signatures and permit documents without rebuilding the project between tools.

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powerlily.com / design
Live per-panel solar production in the Powerlily design tool
A connected design system

The model is the source of truth.

Powerlily is not a panel-placement tool followed by a document stack. Site geometry, equipment, production, strings and price remain connected as the project moves from first layout to signed contract and permit package.

01

Site intelligence

Start with the site that is actually there.

Choose the source that fits the stage of the project, then keep every measurement and site condition in the same editable model.

Editable site model Roof geometry, arrays, context and production stay together.
Current drone surface The customer's capture becomes the measured design canvas.
  1. 01.01

    Remote imagery when speed matters

    Start the sale with Google or Bing imagery, premium Nearmap or EagleView coverage, and available elevation data. Switch sources without starting a second project.

  2. 01.02

    Your own current drone survey

    Upload photos, a folder, a zip or supported video telemetry. Powerlily returns a current orthophoto and centimetre-scale measured roof surface inside the project.

    Drone Site Surveys
  3. 01.03

    Automatic roof intelligence

    Detect roof planes, ridgelines and obstructions from Digital Surface Model elevation, with pitch, azimuth and height grounded in the surface itself.

  4. 01.04

    One hybrid 2D and 3D canvas

    Draw with snap-to-edge and panel auto-fill, then move between plan and perspective views without maintaining two versions of the design.

  5. 01.05

    The whole property, not just the roof

    Bring in Regrid parcel boundaries, label lot-line lengths, and model trees, obstructions, setbacks, annotations and the surrounding site together.

  6. 01.06

    Every common installation type

    Use the same tool for residential and commercial roofs, ground mounts, carports, canopies, and single or dual-axis trackers.

02

System engineering

Engineer while you draw.

The design responds while it is being built. Production, shade, electrical limits, storage behavior, materials and price remain live instead of waiting for a separate calculation pass.

Immediate engineering feedback Every change can be evaluated while the designer is still making it.
  1. 02.01

    8,760 hours on every panel

    Simulate a full year of irradiance per module with the Perez sky model. Production refreshes as panels, pitch, azimuth and site conditions change.

  2. 02.02

    Shade you can diagnose

    See live SAV, TSRF and TOF at panel level, with trees, obstructions and terrain represented in the same scene that produces the result.

  3. 02.03

    Stringing from real equipment limits

    Auto-string modules to inverter MPPT windows, current, power and temperature-corrected voltage limits. Microinverters are handled as branch circuits.

  4. 02.04

    Storage modeled against the project

    Run hour-by-hour state of charge, seasonal backup ranges, time-of-use arbitrage and demand-charge savings against the design and customer usage.

    Battery analysis
  5. 02.05

    A design-driven bill of materials

    Measure rails, splices, attachments, clamps and other quantities from the layout. Dynamic line items and price bases re-total when the design changes.

    Equipment and pricing
  6. 02.06

    Expert help without a handoff

    Use a design credit when capacity is tight. A Powerlily expert returns a completed, fully editable layout with stringing and production in the same account.

03

Proposal and contract

Turn the engineered system into the sale.

The proposal inherits the real project instead of becoming a separate marketing artifact. Choose the level of control the deal needs, then deliver and sign it from the same record.

Designed proposal Pixel-level control when the project or brand calls for it.
Live web proposal A customer-ready presentation that stays connected to the quote.
  1. 03.01

    Three proposal paths

    Launch a proven Proposal Preset, publish an instant responsive web proposal, or use the visual editor for complete control over a designed document.

  2. 03.02

    A presentation built around your brand

    Control sections, language, imagery, colors, responsive layouts and custom CSS. Publish under your custom domain and export a branded PDF.

  3. 03.03

    The project story stays factual

    Carry the real array, production, energy usage, storage, options, equipment, pricing, incentives and terms into customer-facing documents.

  4. 03.04

    Delivery for the customer in front of you

    Text the live proposal link, send it by email, or use both. Send yourself a test text without contacting the customer before the real delivery.

  5. 03.05

    Know when the deal moves

    Track proposal opens and engagement, then optionally send verified staff text alerts when the customer first opens or completes the quote.

  6. 03.06

    A defensible signing ceremony

    Guide the customer and countersigner through private links, record consent and audit details, seal receipts with SHA-256 fingerprints, and email the final copy automatically.

04

Permit and handoff

The signed design keeps working.

Engineering and operations receive the same system the customer approved, with editable electrical drawings, coordinated permit sheets and reports generated from project truth.

Design-driven SLD Electrical documentation begins with the real system layout.
Coordinated plan set Editable sheets, placards, specifications and revisions in one package.
  1. 04.01

    A single-line diagram from real strings

    Generate the SLD from the actual inverter, string and battery layout, including conductor sizing, grounds, breakers, code references and busbar checks. Every element stays editable.

    SLD editor
  2. 04.02

    Coordinated permit sheets

    Assemble cover, site, roof, electrical, placard and specification sheets with property lines, string colors, annotations and an append-only revision history.

    Plan set editor
  3. 04.03

    Reports generated from the design

    Export branded shade, production and racking BOM reports with the project values already populated instead of redrawing them in a document tool.

  4. 04.04

    One roof model for solar and roofing

    Classify and measure eaves, ridges, hips, valleys and rakes, calculate facet areas, and quote the re-roof from the same model as the array.

  5. 04.05

    The package stays connected

    Attach the exact equipment specifications, keep revisions with the project, and hand installation teams the approved design without a disconnected export workflow.

  6. 04.06

    Real artifacts, ready to inspect

    Open complete roof, shade and racking documents below. They are exported Powerlily PDFs, not conceptual mockups.

Exported from Powerlily

Inspect the actual deliverables.

Open three complete branded PDFs exactly as a customer, installer or plan checker receives them.

Ready to move from site model to signed, permit-ready system?

Create the design once and keep the whole project connected. Onboarding is included.

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Pericles
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