The Solar PV Question Bank – 1,079 Practice Questions

Are you preparing for the COREN or ECREEE off-grid solar PV certification exam? This question bank gives you 1,079 practice questions with fully worked answers — covering every competency area tested in Nigeria and across the ECOWAS region.

What's inside:

• Safety, solar resource, electrical fundamentals
• PV cells, modules, arrays, batteries, charge controllers, inverters
• System design, sizing, installation and protection
• Calculations: energy, cable sizing, voltage drop, battery sizing
• Module datasheet reading
• Wiring and single-line diagrams
• Multiple-response, structured theory, customer care, troubleshooting, and oral/viva sections

Every numerical answer is worked step by step — the way an examiner expects to see it. Answers are grouped at the end of each section so you can test yourself before checking.

Written by Engr. Abiodun Ojobaro. First edition, 2026.