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Single Line Diagrams

Your string layout, drawn to code.

Powerlily reads the inverters, strings, branches and batteries you designed, lays out the electrical path, sizes it for the project jurisdiction, and leaves every generated element editable.

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powerlily.com / sld
Auto-generated single-line diagram in the Powerlily SLD editor
Design-driven electrical

The diagram begins with the system you already built.

Instead of answering a second questionnaire, generate from project equipment and stringing. Powerlily handles the repeatable engineering, exposes the checks, and gives the designer control of the drawing.

01

Generate

Walk the actual electrical design.

The first draft is assembled from project truth: real equipment, real circuit topology and the system values already calculated in the design tool.

Ready from project data Generation starts with the selected panels, inverters and batteries.
  1. 01.01

    Strings remain strings

    Draw each string-inverter MPPT with its assigned modules and electrical values instead of collapsing the array into a generic count.

  2. 01.02

    Microinverters remain branches

    Represent AC branch circuits, module counts and required protection using the topology that will actually be installed.

  3. 01.03

    Storage joins the same path

    Include batteries, hybrid inverters, disconnects and backfed breakers as part of the system rather than a detached annotation.

  4. 01.04

    Multiple structures stay legible

    Handle detached buildings, structure-level AC disconnects and feeders while keeping the power flow readable.

  5. 01.05

    Know when the source changed

    When the array is restrung after generation, Powerlily warns that the diagram is stale and can rebuild it from the updated design.

02

Engineer

Make the electrical decisions visible.

Jurisdiction, weather and system characteristics drive the calculations, while the resulting schedules and warnings remain available for review.

Reviewable code intelligence The diagram exposes the assumptions behind the drawing.
Project-specific configuration Engineering values stay accessible before issue.
  1. 02.01

    NEC and CEC awareness

    Use the project location to choose the appropriate electrical language, references and calculation behavior for US or Canadian work.

  2. 02.02

    Weather-grounded design temperatures

    Bring project design temperatures into temperature-corrected voltage and conductor decisions instead of relying on a universal assumption.

  3. 02.03

    Conductor and grounding schedules

    Size current-carrying conductors, equipment grounding conductors and overcurrent protection, then place the results into editable schedules.

  4. 02.04

    Voltage drop that follows the run

    Review calculated voltage drop against the circuit values and distances represented by the project.

  5. 02.05

    A live 120% busbar check

    Surface service-panel loading and the practical correction paths: change the breaker, use a power control system, or revise the interconnection.

03

Edit and issue

Use automation as the starting point, not the cage.

The generated diagram is a drawing canvas. Review its layout, add local requirements and issue it as part of the coordinated permit package.

A drawing, not a black box Generation gets the page started; the engineer keeps the pen.
  1. 03.01

    Every element remains editable

    Move symbols, reroute conductors, change labels, add notes and refine the diagram after generation.

  2. 03.02

    A readable system flow

    Organize array, DC protection, equipment, service and utility zones with separate wire lanes to reduce accidental overlap.

  3. 03.03

    Schedules, legend and title block

    Keep the supporting electrical information on the same controlled sheet as the drawing.

  4. 03.04

    Battery and interconnection context

    Carry equipment and service decisions into the permit record without rebuilding them in a generic drafting tool.

  5. 03.05

    One coordinated PDF

    Place the SLD into the Powerlily plan set alongside site, roof, notes and placard sheets, then export the complete package.

    Plan set workflow

Generate from the design. Issue with control.

Turn the actual system layout into a reviewable, editable electrical drawing.

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Pericles
Pericles
Powerlily assistant
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