200 AND 400 AMP PANEL UPGRADE SPECIALISTS HERCULES TO BERKELEY

Insurance-flagged Zinsco, Federal Pacific, and Challenger panels replaced. Call 510-224-5795.

KNOB AND TUBE REMOVAL AND REWIRE 98% 5star Reviews on YELP!

Older 60A, 100A, or even some 150A panels often cannot keep up with today’s electrical demands. A 200-amp upgrade provides the capacity and safety margin for:

  • EV Level 2 chargers
  • Heat pumps and high-efficiency HVAC
  • Induction ranges and electric water heaters
  • Solar and battery systems
  • Home offices, workshops, and modern appliances
  • Future additions and remodeling

It also replaces outdated or hazardous equipment (such as certain Federal Pacific, Zinsco, or overloaded panels) and brings your service up to current code standards.

Old Zinsco electrical panel, replaced by AC3 LLC in the East Bay

Old Zinsco/Sylvania Panel Replacement

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Federal Pacific Stab-Lok breaker panel, replaced by AC3 LLC in the East Bay

Old Federal Pacific Panel Replacement

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Old Challenger panel breakers with frayed cloth-covered wiring, replaced by AC3 LLC

Old Challenger Panel Replacement

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Highly Professional Electrical Lighting Work

Whether you need simple repairs or want to turn your home into a smart home, our experience and expertise will support you along the way.

Take a look at our past work.
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Our Promise: Satisfaction Guaranteed

We always aim to satisfy our customers. If you are not happy with our work, however, we will rectify the situation at no extra cost.

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What Our Customers Say

5-star reviews from East Bay homeowners on Yelp

★★★★★

I want to take a moment to recognize Ken for the excellent electrical work he completed at my house. Finding someone you feel comfortable trusting with your home can be difficult, especially when it comes to electrical work, so I truly appreciated his professionalism and the care he put into the job.

One of the things I appreciated most was Ken's willingness to explain the work and answer my questions. Electrical issues aren't always easy for a homeowner to understand, and it makes a big difference when someone takes the time to walk you through what needs to be done. I felt comfortable asking questions and appreciated having a better understanding of the work being performed.

Ken showed great attention to detail throughout the job. He took pride in his work and treated my home with respect. It was reassuring to see that he cared about the quality of the finished work and wanted everything done properly. As a homeowner, that kind of care goes a long way toward making you feel confident in the person you've hired.

Beyond the work itself, Ken was courteous, approachable, and easy to communicate with. Having someone working in your home can sometimes be stressful, but he made the experience a positive one. I appreciated the effort he put into the job and the way he handled himself from start to finish.

Overall, I am very happy with the electrical work Ken completed and grateful for his help. I would gladly have him back for future electrical projects and recommend him to anyone looking for a knowledgeable, professional electrician who takes pride in his work. Thank you, Ken, for taking such good care of my home!

Troy H. · Oct 5, 2026 · Yelp
★★★★★

I will give it to mr. Ken (owner or AC3LLC) a 5 star review and this is why. He is Patient, dealing with the City permit, PG&E (not easy,) explaining to you what is going to do, step by step, every day you see him. Knowledge (more than 50 year of experience) and in this field of electricity is paramount. At the end of the day he takes pride to show you what he has accomplished. First day I met mr. Ken I was sold. He changed both of my house's electric panels and upgraded from 100amp to 200 amp. Inside the house panel was a 1961 Zinsco panel (insurance won't cover you if you don't change it) and now replaced with a Siemens panel 100 amp. Outside panel (also dangerous and dated) was replaced with a new panel SQ D 20/40 SOLAR READY. Finally I have a 200 amp system for all my future electric needs.The price was right (he stands behind is words) and he sent an estimate in details that I just said, YES let's do it. We set the approximate date to start (he is busy) and the rest is history. Yes, I definitely recommend Mr ken for electric work. Thank you so very much for making my house much safer than before.

Vince M. · Sep 24, 2026 · Yelp
★★★★★

Ken has helped me with a slew of electrical projects lately:

  1. Installed a 200A panel
  2. Laid underground conduit to our detached office / shed
  3. Added a subpanel to the shed
  4. Added light fixtures and outlets to the shed
  5. Added a new dryer circuit and swapped out some interior lights in our house.

All of the work has been excellent. Ken is thorough and detail oriented; he does not cut corners. He handled all the permits and has been very easy to work with.

Before we started any projects or signed any contracts, Ken and I had a weeks-long conversation where he gave me advice about what was feasible and what was not, and helped me understand what would be required to do the work right.

I highly recommend you reach out to Ken if you need electrical work done.

Brian K. · Jun 29, 2026 · Yelp
★★★★★

My homeowners insurance was cancelling me because their inspection revealed that I had fuses for the incoming main electrical shut off for the house. After speaking to several companies for quotes and availability I chose AC3LLC. The bid was in the middle compared to other companies. I was pleasantly surprised at Ken's friendly, honest, and no bs customer service. It was excellent. He is the owner and master electrician with a helper. A fourth generation electrician with SIXTY years of experience! He cares about his work in detail, and navigates the PG&E and inspection bureaucracy very well. My new incoming service from pole to brand new breaker box is a current as can be!

Eric W. · Mar 2, 2026 · Yelp