Field notes & guides
From the shop
Tesla news, service findings, and EV advice. Written by Ray Novelo — not marketing copy. Real jobs, real Teslas, real Southern California roads.
Aerospace-trained electrical specialist·U.S. Marine veteran·Mobile EV repair, LA–San Diego
Featured
Battery
The 12V battery is the most dangerous blind spot in Tesla ownership — and most owners don't know it exists
Your Model 3 could have a dead battery with a fully charged HV pack. Here's why.
3/12/2025•3 min read
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Software
Tesla 2025.x update changed charging behavior — here's what shifted and why it matters
2/28/2025•2 min read
Charging
Supercharger etiquette and tips most Tesla owners learn the hard way
2/15/2025•2 min read
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EV 101
NMC vs. LFP — the two battery chemistries in your Tesla, explained without the hype
2/1/2025•2 min read
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Tires
Model Y tire replacement guide — what Ray actually puts on customer cars and why
1/20/2025•2 min read
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Service finding
I've serviced 40+ Teslas this quarter — here's what actually keeps failing
1/10/2025•2 min read
Battery
Your Tesla warranty probably covers more than you think — here's what to push back on
12/28/2024•2 min read
Showing 6 of 7 posts
New post when there's something worth saying
No newsletter cadence, no filler content. Ray posts when there's a real finding — a common failure, a software change that affects your car. Usually once or twice a month.
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Ray Novelo
Owner, Ray's EV Service · Tesla specialist
U.S. Marine veteran and Aerospace-trained electrical specialist. Every post is based on real jobs, real fault codes, and real conversations with Tesla owners across Southern California.