Panel upgrade and service upgrade are not the same thing
A main panel upgrade changes the electrical equipment on the house. A utility service upgrade can also involve the service conductors, meter equipment, trenching, overhead work, or utility review from PG&E. Those are different scopes with different costs and timelines.
A home can need panel work because the existing equipment is unsafe, obsolete, too crowded, or not code-compliant. That is different from needing more utility capacity because the home now has EV charging, heat pumps, induction cooking, battery storage, or other large electric loads.
Why older Bay Area homes get flagged
Many San Francisco and Bay Area homes were built around 100A or 125A service. That was often enough for gas heat, gas water heating, and one modest car charger. It can look insufficient once a quote adds solar equipment, a large battery, Level 2 EV charging, heat-pump HVAC, a heat-pump water heater, or an electric range.
The important question is not whether the home could ever use more than 100A in a worst-case spreadsheet. The question is whether the system can manage real loads so the home stays within safe limits while still doing what the homeowner needs.
How a smart panel and battery can help
A smart panel can prioritize and shed loads instead of letting every large circuit run at the same time. A battery can cover short peaks, support backup loads during outages, and reduce the need to size the utility service around rare simultaneous demand.
That does not make code optional. It gives the designer more tools. Instead of defaulting to a utility-side upgrade, the design can ask which loads need to run together, which can be controlled, which should be backed up, and how the battery should support the home during peak periods.
When an upgrade may still be the right answer
Some homes should be upgraded. A smart panel cannot fix damaged equipment, unsafe wiring, missing working clearance, an overloaded existing panel, or local requirements that apply to a specific property.
Multifamily buildings, ADUs, very large EV charging needs, electric resistance loads, unusual meter locations, and homes with prior unpermitted work can also change the answer. The site walk and load calculation decide the scope.
Questions to ask your installer
If an installer says you need a 200A upgrade, ask them to separate what is required from what is convenient. A panel upgrade can be the right call, but it should not be a placeholder for engineering.
- Is the upgrade driven by safety, code clearance, physical space, or capacity?
- Does the quote include PG&E service work, or only the panel on the house?
- Who manages the PG&E application and inspection sequence?
- What load-management strategy was considered before requiring an upgrade?
- Which circuits will be backed up, shed, or controlled by the smart panel?
- What changes if I add a second EV or heat pump later?
Potrero designs around the bottleneck
Potrero starts with the existing service, the main panel, interval usage, planned electrification, and the homeowner's backup priorities. If the home can be electrified safely with a smart panel and battery, that is usually faster and cleaner than waiting on a utility-side service upgrade.
If the home really does need an upgrade, the proposal should say so plainly and explain why. The useful answer is not always the cheapest answer. It is the answer that keeps the house safe, inspectable, and ready for the next decade of electric loads.