If your insurance company flagged your Zinsco, Sylvania-Zinsco, or GTE-Sylvania panel, you're not alone. These panels are common in older East Bay homes and are one of the top reasons carriers cancel or refuse coverage. AC3 LLC replaces them fast across the full area from Hercules north to Berkeley south — Pinole, Richmond, El Sobrante, San Pablo, Albany, and beyond. Why Insurers Reject Zinsco Panels. Zinsco breakers can fuse to the aluminum bus bar. When that happens the breaker may not trip during an overload — exactly the opposite of what it's supposed to do. Most insurers now treat them as an automatic red flag. What We Do. Confirm the panel and give you a clear written quote. Pull the permit and coordinate the PG&E disconnect and reconnect. Install a modern 200-amp panel. Label every circuit and pass final inspection. Expedited scheduling available in most cases. Our Yelp reviews repeatedly mention how we handle the City and PG&E side so you don't have to. Call or text 510-224-5795 or email Info@ac3usa.org. We'll come look at it and tell you exactly what needs to happen.