I-S3 String Planner is a free public web app from I-S3 for solar PV field work.
Place modules on satellite imagery or drawings, manage inverters and strings with visible wiring routes,
then share the project via JSON/CSV or distribute print/PDF layouts to the field.
No installation required. 11 languages. Runs entirely in the browser.
Latest UI: modules on satellite imagery, string color coding, wiring routes, inverter/string panel,
PDF export, grid display, and field-ready print layouts.
Page 1: diagram + legend/summary; page 2+: wiring-order list with auto pagination
Configurable size, orientation, footer fields, and logo
Ready for site handover and O&M documentation
Wiring Routes and U-Shape Opening Side
Visual string routing on the canvas
Specify the open side of U-shaped rows per module or globally
Easier sharing of wiring and inspection order on site
Workflow and Canvas Tools
Pan, zoom, fit, 100%, grid, 1px snap
Shift+click/drag multi-select, bulk assignment
Cmd/Ctrl+D duplicate, Delete, arrow nudge, ? quick help
Import / Export
JSON and CSV project save/load
Background images: PNG, JPG, PDF
Guidance for GitHub Gist / Raw URL loading
A Design and Record Tool Connecting Construction and O&M
Accurate string configuration matters when building a PV plant.
After commissioning, teams need to know which module connects to which inverter and string.
I-S3 String Planner handles both in a lightweight browser workflow.
Place modules on drawings, photos, or satellite imagery
Store inverter/string data per module; bulk assign from the context menu
Attach notes to modules; active notes blink until archived
11 languages; no installation required
How to Use It
This free public tool supports design review, field checks, and O&M workflows.
Final construction, permitting, and equipment selection still require formal engineering against
equipment specs, electrical standards, utility rules, safety codes, and site conditions.
I-S3 also supports PV planning, design, and construction consultation using PVSyst, 3D modeling,
and site-specific engineering knowledge.