This is a set of the official textbook and problem collection, perfect for preparing for the Solar Power Advisor exam. Purchased this month, October 2025, and only opened a few times, so there are no markings, scratches, folds, or any other damage. If you want to start studying right away, please take a look. - Title: Solar Power Advisor Exam Problem Collection - Title: Solar Power Advisor Exam Official Textbook - Revised Edition: Reiwa Revised Edition - Issuing Organization: NPO Japan Solar Power Generation Association - Contents: Includes 100 questions in the format of the actual exam - Contents: Covers the basic knowledge of system installation