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Field notes on solar design.

Working guides for the people who design, engineer, and sell solar. Layouts, plan sets, code, energy modeling, and utility-scale workflows.

How to Design a Solar Panel Layout: A Step-by-Step Guide
Jun 26, 2026 · 9 min read

How to Design a Solar Panel Layout: A Step-by-Step Guide

A hands-on walkthrough for laying out a rooftop solar array: reading roof planes, setting azimuth and tilt, holding fire setbacks, spacing rows, and matching module count to the inverter so the design is buildable.

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From Sales Sketch to Permit-Ready CAD: Fixing the Design Handoff
Jun 12, 2026 · 8 min read

From Sales Sketch to Permit-Ready CAD: Fixing the Design Handoff

A rep closes with a quick rooftop sketch, then engineering redraws the whole thing in CAD because none of the data carries over. Here is what a connected sketch-to-CAD workflow looks like and which design data should survive the handoff.

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Conductor and Wire Sizing for PV: An NEC 690 Primer
Jun 5, 2026 · 9 min read

Conductor and Wire Sizing for PV: An NEC 690 Primer

How to size PV source and output circuit conductors under NEC Article 690 and 310, from the 125% current factors through temperature and conduit derating, voltage drop, and overcurrent protection.

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Single-Line Diagrams for Solar: What AHJs Look For
May 22, 2026 · 8 min read

Single-Line Diagrams for Solar: What AHJs Look For

What a compliant PV single-line diagram has to show for plan check: modules and strings, the inverter, DC and AC disconnects, conductor and OCPD ratings, grounding and bonding, the point of interconnection, and rapid shutdown, plus the omissions that reliably get plans kicked back.

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Utility-Scale Solar Layout: Trackers, GCR, and Terrain
May 15, 2026 · 10 min read

Utility-Scale Solar Layout: Trackers, GCR, and Terrain

How to lay out a multi-megawatt solar field: balance ground-coverage ratio against row shading, choose fixed-tilt or single-axis trackers, set backtracking, and fit the design to real terrain and grading limits.

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How Solar Design Software Shortens the Sales Cycle
May 1, 2026 · 8 min read

How Solar Design Software Shortens the Sales Cycle

A solar deal usually stalls in three spots: waiting for a site visit to measure the roof, waiting on engineering for a proposal, and re-quoting when the first numbers do not hold. Here is how a fast remote layout and an accurate, credible proposal collapse that timeline, and why accuracy is the part that actually converts.

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Choosing Solar Design Software: A Buyer's Guide
Apr 17, 2026 · 9 min read

Choosing Solar Design Software: A Buyer's Guide

Most solar companies pick a design tool on the demo and regret it a year later when the layouts do not turn into permit sets. This buyer's guide walks through the criteria that actually predict fit: sales speed, CAD and permit output, utility-scale reach, energy modeling, and how cleanly the tool hands work from sales to engineering.

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Solar Interconnection Applications: Designing to Get Approved Fast
Apr 10, 2026 · 9 min read

Solar Interconnection Applications: Designing to Get Approved Fast

Permitting and interconnection are two separate approvals with two different reviewers, and projects stall when the documents you send each one disagree. Here is what the AHJ and the utility each need, how the two tracks differ, and how one consistent design keeps both from bouncing back.

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