Meet Marvin Kennedy
Marvin Kennedy holds the RVTI Level 4 Master Certified RV Technician rating, the highest certification level in the United States RV technician field.
With years of hands-on field experience, Marvin has inspected, diagnosed, and repaired RVs of every type and size across Northeast Tennessee and beyond.
He created DIYRVTech.com and The RV Owner's Preventive Maintenance Guide because he saw too many RV owners paying thousands of dollars for repairs that a simple inspection could have helped prevent.
His mission is to give every RV owner the same system-by-system knowledge he uses every day in the field — in plain language, with printable field tools they can actually use.
What This Means For You
The RV Technical Institute is the certification body created by the RV industry itself. Level 4 Master Certified is the highest rating a technician can earn in the United States — and it requires passing both written and practical exams on every RV system: electrical, propane, water, appliances, chassis, and more.
Most RV content online comes from enthusiasts sharing what worked for them. The guidance at DIY RV Tech comes from the same knowledge base that certified technicians are tested on.
When you follow a maintenance procedure from this site, you are following what a Master Certified technician actually uses in the field — not a forum post, not a YouTube guess, not a dealer handout.
- Written and practical exams required on all major RV systems
- Highest certification level available in the US RV industry
Know your RV. Protect your trip.
DIY RV Tech is built around preventive maintenance education, free tools, printable systems, and future training for RV owners who want to catch problems before they turn into expensive repairs.