HV Safety for EV Technicians

Work on 400–800V EV systems with confidence. HV Safety for EV Technicians is a hands-on tool app for automotive technicians servicing electric and hybrid vehicles — not a book you read, but a companion you use at the bench. Every calculator, checklist, and reference works 100% offline, so it's ready in the bay whether or not you have signal. WHY TECHNICIANS USE IT The 12-volt habits that kept you safe for years can be deadly on a high-voltage pack. This app turns the standards and procedures behind safe EV service into fast, practical tools you can reach for on the spot. SHOP TOOLS (the core of the app) • Glove Class Selector — enter the system voltage and get the right ASTM D120 glove class, max-use and proof-test voltages, with a built-in safety margin. • Glove Retest Tracker — enter the test-stamp date and see the six-month retest due date, days remaining, and In-Service / Due-Soon / Expired status. • Live-Dead-Live Verifier — a guided, step-by-step isolation-verification walkthrough with pass/fail logic so you test before you touch. • Capacitor Discharge Timer — a countdown for the post-LOTO capacitor wait, so you never touch a bus that's still holding charge. SAFE-SERVICE CHECKLIST A repeatable HV job checklist organized into phases — PPE, Lockout/Tagout, Isolation Verify, Work De-Energized, and Emergency-Ready. Tick items as you go; your progress is saved between jobs, and each phase links to the matching chapter. LEARN & STAY SHARP • Study — key facts distilled from every chapter for quick shop-floor reference. • Quizzes — 72 questions across 12 chapters with instant feedback and clear explanations. • Glossary — plain-language definitions of the terms that matter (HVIL, back-EMF, LOTO, CAT III, thermal runaway, and more). • Achievements & progress — badges and readiness rings that track your reading, checklist, and quiz progress. THE FULL GUIDE, BUILT IN Every chapter and figure is included as a bonus reference — PPE and gloves, standards (OSHA 1910, NFPA 70E), LOTO, isolation verification, pack handling, thermal events, first aid, and building a shop safety program. Adjust the text size, bookmark chapters, and resume where you left off. BUILT FOR THE SHOP • Works completely offline — no signal required. • Universal — designed for both iPhone and iPad. • One-time purchase. No ads, no subscriptions, no in-app purchases, no account or sign-in. • Light and dark themes, haptics, and adjustable text size. IMPORTANT This app is a study and reference companion for informational support only. It does not replace formal training, your employer's qualified-person requirements, OEM service procedures, or applicable OSHA/NFPA standards. Always follow the most protective requirement and work within your qualification.