100-Amp vs 200-Amp Service: What Does Your Home Need?

Choose service capacity from an electrical load assessment and the equipment you plan to use. The number printed on a panel, the size of the house and spare breaker spaces do not answer the question by themselves.

Panel rating is not the whole service

The panel is one part of the supply arrangement. A replacement panel does not necessarily increase the capacity available to the property. Ask the electrician to distinguish panel condition, service capacity and branch-circuit needs in the recommendation.

When existing capacity may be enough

A household with modest electrical loads may not need a capacity increase. The answer requires review of the actual installation and proposed equipment, not a blanket rule based on building type. Compatible load-management options may also be relevant to some projects.

What can change the assessment?

EV charging, electric cooking, heating equipment and other added loads should be considered using their specifications. A renovation or additional room does not automatically require 200-amp service. Provide the intended equipment list before committing to a design.

Compare replacement with a capacity upgrade

Ask which equipment is included, whether utility coordination is required and what work addresses the stated problem. Request separate explanations for condition-related replacement and capacity-related work. A larger service does not automatically reduce electricity use.

Plan timing and cost from the property

Access, route lengths, existing equipment and approval requirements affect the proposal. Confirm outages, inspections and any reconnection dependencies before scheduling. Do not rely on a universal one-day installation or assume every upgrade needs the same components.