Derived,
not guessed.
Every value in the package — line diagram, structural calcs, bill of materials, labels — is derived from a rule, not guessed by a model. One graph reconciles the AHJ, the utility, the financier, and your install crew, so the design comes out permittable, interconnectable, financeable, and installable — the same way, every time. Deep enough to pass inspection, tunable enough for the one rule your jurisdiction does differently.
It starts with an address.
Address, AHJ, utility, roof type, service arrangement. Rayn pulls the rest — imagery, wind and snow loads, jurisdiction rules — and tells you plainly what's still missing before the design can be marked complete.
The system designs itself.
Roof planes, module layout, rail spans, attachment spacing, conductor sizing, overcurrent protection, interconnection method. None of it is drawn — and none of it is guessed. It's computed from a single graph against hundreds of rules you control — the AHJ's code, the utility's interconnection spec, the financier's approved-equipment list, your own install standards — deterministic, not probabilistic. So the design comes out fitting everyone who has to say yes. Change one rule and it changes everywhere at once, and every sheet still has to close the same checks.
Cover sheet.
Project data, design criteria, code list, sheet index, auto-generated vicinity map. Stamps sit where the plan checker expects to find them, because that's the first thing they look for.
Median time for an independent tester to take a job from address to permit-ready package. They were measured against a 90–120 minute baseline.
Jurisdiction rejections across the live jobs submitted through Rayn so far.
Sheets in a standard package — cover through spec sheets — generated together, versioned together.
Granular jurisdiction and equipment settings you can tune per market and save as reusable profiles.
Every sheet. Every calc.
Every time.
Computed, not predicted — every number on the set traces to a code rule and a calc, not a best guess from a photo. The whole stack — electrical, structural, labeling, materials — comes out of the same derivation, so the sheets can't disagree with each other. Tune a rule for one jurisdiction and the whole stack moves with it — still accurate, still consistent.
Three-line topology rendered from the system graph. Wire and raceway schedule with voltage drop and conduit fill, equipment schedule, bracketed NEC citations. Microinverter, string, AC- and DC-coupled storage.
Rail spans, attachment spacing, ASCE 7 wind and snow pressures for the exact site, dead load check — plus a stamped letter when the jurisdiction asks for one.
Resolved against your company catalog down to the SKU, including lag counts, rail lengths and control-cable footage. Anything Rayn can't resolve is flagged for review rather than guessed.
Hundreds of AHJ and utility settings, tuned per project and saved per market — fire setbacks, rooftop EGC floors, DC raceway rules, interconnection variants. Set the one thing your city does differently once; every job in that jurisdiction inherits it.
Rules run continuously against the graph and tell you exactly what's blocking completion — missing load calc, unplaced equipment, untraced property line.
Powerwall 3 and IQ Battery, partial and whole-home backup, System Isolation Device topology, EMS/PCS busbar protection under 705.13.
Permit ready. Same day.
Address in the morning, stamped PDF in the afternoon. Submit it, install it, get paid — and when the plan checker comes back with a comment, revise the inputs and regenerate the set.
Built for volume.
Whether you're running a design floor or pulling your own permits, the setup is installer-scoped: your equipment, your markets, your packages.
More output, same headcount
Your designers are turning two to four sets a day. The bottleneck isn't their skill, it's redrawing the same topology. Rayn removes the redraw.
Stop waiting on a vendor
Bring design in-house without building a design department. The package is ready the same day the survey lands, and revisions take minutes.
Sets that don't look self-drawn
Solo operators get the same sheet set the volume shops get — same code coverage, same title block, same plan checker reaction.
Send us one of your jobs.
An address, a utility bill and your equipment package. We'll build the sheet set and send you the PDF — no call required.
Send us a job