Practical guides for the people who design, engineer, and sell solar, covering layouts, plan sets, code, energy modeling, and utility-scale workflows.
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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A permit coordinator's guide to the sheets an AHJ expects in a solar plan set, from cover sheet to placards, and the inconsistencies that trigger plan-check corrections.
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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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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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Fire access pathways, ridge setbacks, and NEC 690.12 rapid shutdown decide whether a rooftop PV layout passes inspection. Here is how to design around them without giving up production.
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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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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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A solar designer's guide to building a defensible year-one production estimate: year-round sun path, near and far shading, the full loss stack, temperature, and soiling, and why a single midday shade snapshot sets you up to over-promise.
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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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A C&I designer's walkthrough of a flat-roof commercial project from first site assessment to stamped plan set, including the structural, obstruction, and interconnection checks that decide whether it moves or stalls.
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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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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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