// Compare · 200-Amp vs 100-Amp · NYC
200-Amp vs 100-Amp
Your panel's amperage is the ceiling on everything electric in your home. Here's how 200A and 100A service really differ — and how to know which your NYC home actually needs before you spend a dollar.
200-Amp
More capacity for modern, electrified homes
100-Amp
The older standard — fine for smaller, simpler loads
For most NYC homes adding modern loads, 200A is the right answer — but plenty of apartments do fine on 100A.
If you're adding an EV charger, heat pump, induction range, or central air — or running out of breaker space — 200A service is almost always worth it and often required. If you're in a smaller apartment or home with gas appliances and no electrification plans, 100A may be perfectly adequate. The honest test isn't the number on the panel; it's a load calculation against what you actually run. We do that calculation free before quoting anything.
200-Amp vs 100-Amp: the full comparison
| Factor | 200-Amp | 100-Amp |
|---|---|---|
| Total capacity | 200 amps — roughly 48,000 watts at 240V | 100 amps — roughly 24,000 watts at 240V |
| EV charger (Level 2) | Comfortable, often with room to spare | Possible but tight; may need a load-management device or block other upgrades |
| Heat pump / induction / central AC | Designed for it | Often maxes out with one or two of these |
| Breaker spaces | More circuits — room to grow | Fewer slots; often already full in older homes |
| Typical NYC cost to install/upgrade | $2,800–$4,500 (upgrade from lower service) | Already present in many homes — $0 if adequate |
| Best for | Houses, electrifying homes, EV owners, additions | Smaller apartments, gas-appliance homes, simple loads |
| Resale & insurance | A selling point; expected in modern homes | Can flag as dated on inspection if loads are high |
| ConEd coordination | Required for the upgrade | Not needed if keeping existing |
How to choose
✅ Choose 200-Amp if…
- You're installing an EV charger now or within a few years
- You're moving off gas — heat pump, induction, heat-pump water heater
- Your panel is full and you need to add circuits
- You're renovating, adding square footage, or finishing a basement
- You want the capacity headroom that protects resale value
✅ Choose 100-Amp if…
- You live in a smaller apartment with modest, stable loads
- Your appliances are gas and you have no electrification plans
- A load calculation confirms you're well under capacity
- Your existing 100A panel is modern, grounded, and not full
The NYC angle
NYC's electrical future is one-directional: gas bans in new construction, Local Law 97 pushing buildings toward electrification, and EV adoption climbing. A 100A service that's adequate today can become the bottleneck the moment you add a charger or heat pump.
That said, we never upsell amperage. Many pre-war co-op apartments run beautifully on 100A — or even less — and the right move is a panel modernization at the same amperage, not a costly service increase. We do a free load calculation and tell you which situation you're in. See real numbers on our panel upgrade cost guide.
Not sure which service size you need?
We run a free load calculation against what your home actually uses — then quote the honest answer, whether that's a full 200A upgrade or no upgrade at all.
200-Amp vs 100-Amp: common questions
The reliable way is a load calculation — totaling your actual and planned loads against capacity. Practical red flags: a full panel with no room for new circuits, lights dimming when large appliances start, plans for an EV charger or heat pump, or an inspection flagging your service as undersized. We run the calculation free.
Typically $2,800–$4,500, including ConEd coordination, the DOB permit, the new panel and meter pan, and inspection. Pre-war buildings or difficult meter locations can run higher. Full breakdown on our panel upgrade cost guide.
Sometimes — with a load calculation confirming headroom, or by adding a load-management device that pauses charging when household demand peaks. But if you also run AC, electric dryer, or plan a heat pump, 200A is usually the cleaner long-term answer.
Yes — 100A is a safe, code-legal service size. The question is capacity, not safety: an overloaded 100A panel trips breakers (doing its job), it doesn't become dangerous. Danger comes from old equipment or bad wiring, which is a separate issue from amperage.
Yes — increasing your service amperage involves ConEd because the upgrade affects the meter and the utility's connection. We handle all ConEd coordination as part of the job; you don't deal with the utility directly.
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