Terms and Conditions

Last updated: 9 October 2026

This site is operated by QUILLSTONE DIGITAL LLC, 1057 NW 136TH AVE, Miami, FL 33182, United States, trading as Studio Facile. You can reach us at info@studiofacilebook.com and we answer within 24 hours on working days.

What we sell

Illustrated study material about solar photovoltaic (PV) installation for installers and electrical apprentices in the United States, delivered as downloadable PDF files. Nothing is shipped physically.

This is study material, not a course, a license or a certification. It does not replace the National Electrical Code edition adopted where you work, the authority having jurisdiction, the instructions of listed equipment, OSHA training or a licensed electrician, and it cannot guarantee passing any exam. It is not affiliated with or endorsed by NABCEP. The practice questions were written for this material; they are not official exam questions.

Your purchase

One payment. There is no subscription and no recurring charge.
Payment is processed by Stripe. We never see or store your card number.
The download link is emailed to the address you enter at checkout, normally within a few minutes.
If a title is sold before it is finished, you receive it in the same folder as soon as it is ready, at no extra cost.

What you may and may not do with the files

You may read the files on your own devices and print them as often as you want for your own use. You may not resell them, share them publicly, upload them to file-sharing sites or distribute them to third parties.

Refunds

See the refund policy.

Liability

We take care that the content is accurate and based on recognized sources (the National Electrical Code as a concept, OSHA rules, and NABCEP's published job task analysis as a concept). Even so, the material is educational: always follow the NEC edition your AHJ enforces, equipment instructions and safe work practices. Calculations are generic practice examples. To the extent allowed by law, our liability is limited to what you paid.

Changes and governing law

We may update these terms; the date at the top shows when. These terms are governed by the laws of the State of Florida, United States.