100 Amp vs. 200 Amp Panels: What’s the Difference?
If you’re a homeowner in San Diego thinking about an electrical panel upgrade, you’ve probably heard the terms 100 amp panel and 200 amp panel. But what do these numbers really mean, and how do you know which one is right for your home?
At Andre Electric, we help homeowners across San Diego make smart decisions about their electrical systems every day. Here’s a breakdown of the differences between 100 amp and 200 amp panels—and why it matters.
What Is an Electrical Panel’s Amp Rating?
The amp rating of your electrical panel tells you how much electrical current it can safely handle. Think of it like the size of a water pipe: the larger the pipe, the more water can flow through.
A 100 amp panel can provide up to 100 amps of electricity to your home.
A 200 amp panel can provide up to 200 amps—double the capacity.
This difference directly affects how many devices, appliances, and systems your home can run without tripping breakers or overloading circuits.
Common Uses for 100 Amp Panels
Not too long ago, 100 amp panels were standard in most homes. They can still be adequate if:
Your home is smaller (under ~2,000 sq. ft.)
You use gas for heating, water heating, and cooking
You don’t plan on adding high-demand appliances like hot tubs, central A/C, or EV chargers
However, in today’s world of smart homes, multiple electronics, and electric cars, 100 amps is often on the edge of being too small.
Why Many Homes Now Need 200 Amp Panels
A 200 amp panel is now the modern standard for new homes and remodels. Here’s why:
Enough capacity for large appliances like central A/C, electric water heaters, and ranges
Room to add EV chargers or solar systems
Fewer tripped breakers from overloaded circuits
Extra space for future upgrades (so you don’t have to replace the panel again later)
If you want peace of mind that your electrical system won’t hold you back, a 200 amp panel is usually the smarter choice.
How to Know If You Need an Upgrade
You may want to consider upgrading if you notice:
Lights dimming when appliances turn on
Breakers tripping often
Not enough breaker spaces for new circuits
Plans to install an EV charger, solar panels, or central A/C
Cost Considerations in San Diego
Upgrading from a 100 amp to a 200 amp panel is an investment. In San Diego, most panel upgrades range between $2,500–$5,000, depending on your home, permits, and utility requirements. While it’s not cheap, it’s often necessary for safety and to keep up with today’s electrical needs.
Final Thoughts
The difference between a 100 amp and 200 amp panel comes down to capacity and future-proofing. A 100 amp panel might still work for smaller homes with low demand, but most San Diego homeowners benefit from upgrading to a 200 amp panel.
If you’re unsure what your home needs, our licensed electricians at Andre Electric can evaluate your system and recommend the right panel for your lifestyle.
👉 Call us today to schedule an estimate for your panel upgrade.
