Roof Panel Footprint Planner

WHATSON / SOLAR & BATTERY

Roof Panel Footprint Planner

Fit modules into an entered rectangular usable area in two orientations.

Starting values are editable examples. Enter your own loads, datasheet values and site assumptions.

1 Usable rectangle
2 Module and gaps
Solar & Battery

A roof panel count needs a usable rectangle after access and setbacks, rather than the building's full footprint.

Enter module dimensions and the measured available area. Compare both orientations before planning tilt rows, shadows and structural requirements.

01 / GET STARTED

How to use Roof Panel Footprint Planner

  1. Enter usable roof length and usable roof width.
  2. Enter module length, module width, clear gap between modules and module power.
  3. Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.
02 / A CLEARER WORKFLOW

Why choose this tool?

The orientation comparison gives a clear footprint check without implying that the larger fit is the approved layout.

Before you use the result

Flat rectangular footprint only. Define usable area after setbacks and access. Tilt rows, shadows, structure, fire access and wind loads need a site design. The larger fit is not structural approval.

03 / COMMON QUESTIONS

Questions about Roof Panel Footprint Planner

Does the fit prove the roof can support the panels?

No. Structure, wind loads, fire access and installation details require a site design.

What should I check before using Roof Panel Footprint Planner?

Check Usable roof length, Usable roof width, Module length and Module width. Use the exact units shown beside the controls and replace any example values with your own inputs.

More from Solar & Battery

Related Tools

Explore the other tools in this collection.

31 tools
Explore Whatson tool information