What a 200 Amp Service Upgrade Actually Changes
Your electrical service is the pipeline that brings power from DTE’s lines into your home. Its size, measured in amps, sets how much electricity the house can draw at one time. Many older Ann Arbor homes were wired for 60 or 100 amps, which was plenty when the biggest loads were a refrigerator and a window air conditioner.
A 200 amp service upgrade doubles that capacity from a 100 amp home. It is more than a new breaker box. A complete electrical service upgrade usually includes:
- A new 200 amp panel with room for future circuits
- A new meter base (the outdoor socket the meter plugs into)
- New service entrance conductors between the meter and the panel
- A new mast and weatherhead on overhead services, when needed
- Updated grounding and bonding to current code
If your panel is simply worn out and your power needs have not changed, a straight panel replacement may be enough. Our electrical panel upgrade page explains the difference.
Why EVs, Heat Pumps and Induction Ranges Push Homes to 200 Amps
The appliances people are adding today are electric and they are big. A Level 2 EV charger can draw 40 or 48 amps for hours at a time. A heat pump runs through the coldest Michigan nights. An induction range, electric dryer and electric water heater each want their own 240 volt circuit.
Put two or three of those in a 100 amp house and the math stops working. You see it as breakers that trip, lights that dim when the heat pump starts, or an electrician telling you there is no room left for another circuit.
A 200 amp service gives you room for an EV charger installation, a heat pump, a hot tub or sauna and a finished basement without constant juggling. It also makes a future whole house generator easier to plan.
Start With a Load Calculation
Before we recommend a 200 amp service upgrade, we run a load calculation. It is a standard method from the electrical code that adds up your home’s square footage, fixed appliances, heating and cooling, and any new equipment you are planning. The result tells us how much capacity your home really needs.
Sometimes the answer surprises people. A well-planned 100 amp home can occasionally handle one new charger with a load management device. Other times a homeowner who only asked about an EV charger learns the house is already near its limit. Either way, you get an honest answer and a plan that fits the next ten years, not just the next appliance.
Meter Base Replacement and Service Entrance Work
The meter base is often the part of the job homeowners do not expect. On older homes it can be undersized, rusted or loose inside, and it has to match the new 200 amp rating. We replace it along with the service entrance cable or conduit that carries power to the panel.
On overhead services we check the mast, the weatherhead and the attachment point where DTE’s lines meet the house. On underground services we look at the conduit and the path to the meter. These details affect both the scope of the work and what DTE needs to do on their side.
How the DTE Disconnect and Reconnect Works
A service upgrade needs the power fully off at the meter, and only DTE can do that. Here is how the day comes together:
- Walkthrough and load calculation. We review your panel, meter, service and plans, then give you an honest estimate of the time and materials involved.
- Permit. We pull the electrical permit with your city or township.
- DTE coordination. We schedule the disconnect with DTE so the power is off when our crew is ready to work.
- Installation day. Our electricians install the new meter base, service entrance and 200 amp panel, move every circuit, and label the panel clearly.
- Inspection and reconnect. The inspector reviews the work, then DTE reconnects power at the new capacity.
We will tell you ahead of time how long the house will be without power, so you can plan around the refrigerator, sump pump and work-from-home schedule.
Signs Your Home Is Ready for an Electrical Service Upgrade
A 200 amp service upgrade is worth a conversation if any of these sound familiar:
- You have 60 or 100 amp service and are adding an EV, heat pump or electric range
- Breakers trip when a few large appliances run together
- The panel has no open spaces, or it is full of doubled-up breakers
- The meter base is rusted, pulling away from the siding or damaged
- Your home still has a fuse box or a Federal Pacific or Zinsco panel
- You are finishing a basement or building an addition
A Good Time to Add Surge Protection
While the panel is open, it is the easiest moment to add a whole-house surge protector. It mounts at the panel and helps shield your furnace, appliances and electronics from voltage spikes. We can also label spare spaces for a future generator inlet or transfer switch so you are ready when you want one.
Why Ann Arbor Homeowners Call Current Electrical Systems
We have been doing electrical work around Ann Arbor since 1994, and our electricians are union trained through IBEW Local 252. Service upgrades are routine work for us, and we know how to keep the day organized with DTE and the inspector. You get a clean job site, a neatly labeled panel and straight answers about what your home needs. Call us at (734) 210-7667 to schedule a visit.