A 100-amp electrical service may be enough if your home’s current equipment runs safely and you have room for what you plan to add. A 200-amp service gives you more capacity, but it isn’t an automatic upgrade for every home. The right choice depends on an electrician’s load calculation, not just the size of your house.
If you’re comparing 100 amp vs 200 amp service in Dearborn Heights, MI, think about both today’s needs and future plans. An EV charger, heat pump, or major remodel could change the answer.
01What’s the difference between 100-amp and 200-amp service?
Amps measure how much electrical current your service can supply. A 200-amp service has a higher capacity than a 100-amp service. That does not mean a home with 200-amp service uses twice as much electricity or pays twice as much for power.
Your electrical panel distributes power to the circuits that serve your lights, outlets, and appliances. The service capacity and the panel both matter, but they are not the same thing. Replacing a panel alone does not necessarily increase the amount of power available from the utility. Our related article, Electrical Service Upgrade vs Panel Upgrade, explains the difference in more detail.
02When is 100-amp service enough?
A sound 100-amp service may be enough if an electrician confirms that it can handle your current electrical load and the equipment you expect to add. You do not need to upgrade solely because a neighbor has 200 amps or because your home has an older panel. Condition and capacity are separate questions.
For example, a household that does not plan to add an EV charger or other major electrical equipment may have different needs from one preparing for several upgrades. An electrician can review the appliances and heating and cooling equipment you use, then calculate the load.
03When should you consider 200-amp service?
Consider having your service evaluated before adding a major electrical load. Common reasons include:
- Installing an EV charger
- Switching to electric heating or adding a heat pump
- Adding large appliances or finishing a new living space
- Expanding a business space or changing the equipment it uses
These plans do not automatically require 200 amps. Even a 200-amp service can be insufficient for a property with substantial electrical loads. An electrician needs to check the full system before recommending a size.
04Do frequent breaker trips mean you need 200 amps?
Not necessarily. A breaker that trips often may point to an overloaded circuit, a faulty device, or another electrical problem. Increasing the service size would not, by itself, fix every cause. Have a qualified electrician find the reason rather than assuming the whole property needs more capacity.
05How can you tell what service you have?
If the panel is in a safe, dry area, you can look at the rating marked on its label or main breaker without removing any covers. Treat that number as a starting point, not proof that every part of the service has the same rating. Do not touch wiring, remove the panel cover, or open the meter enclosure.
Before your appointment, make a list of planned additions, such as an EV charger or new electric equipment. You can also tell the electrician about repeated breaker trips or other problems. Do not add up the numbers printed on individual breakers to decide whether you have spare capacity; that is not how an electrical load calculation works. For more on the panel itself, see our guide to electric panel upgrade
06When should you call a professional?
Call a qualified electrician if breakers trip repeatedly, lights flicker, you hear buzzing, or you notice a burning smell, warm outlet, or discoloration. Those signs need a safety check, not a guess about whether 100 or 200 amps is better. If you smell burning or see smoke, stay away from the affected equipment and seek urgent help.
An electrician can inspect the panel, assess the service, and calculate the load before recommending repairs or an upgrade. If the panel itself needs work, learn about Mechanical Heating, Cooling & Electrical’s electrical panel upgrade service
07The bottom line
Choose service capacity based on a professional assessment of what your property uses and what you plan to add. A working 100-amp service may be enough; 200 amps may make sense if your calculated needs exceed what the existing service can support. The panel’s condition matters too, but a panel replacement and a service-capacity increase are different jobs. Start with a load calculation so you can make the right change, if any.
08Get help with an electrical service or panel upgrade
Planning an EV charger, new electric equipment, or a remodel in Dearborn Heights, MI? Mechanical Heating, Cooling & Electrical can review your panel and electrical needs, then help you understand your upgrade options. You can also call if you’re concerned about frequent breaker trips or other warning signs. Reach the team at 313-277-7630.
