Most mobile homes need a 100-amp breaker box when they run on gas with limited appliances, and a 200-amp box once electric heat, central air, or modern high-draw appliances enter the picture.
A single-wide with gas heat and a handful of standard appliances can sit comfortably on 100 amps, and that was the norm for manufactured homes built through the early 1990s. Larger homes, and anything with electric HVAC or a water heater, push into 200-amp territory — now the standard for newly installed manufactured homes. The catch is that the box itself is only half the story. The panel has to match the home’s actual service conductors, meter base, and feeder rating, so the honest answer starts with what you already have, not what you plan to install.
How Do You Check What Size Panel Your Home Already Has?
Read the main breaker first, because it tells you the service rating faster than anything else on the property. Open the panel door and look at the largest breaker at the top or bottom center — the one with the main disconnect.
- Main breaker or main fuse: the amperage is stamped right on the handle or the breaker body, usually as “100,” “150,” or “200.”
- Panel label: the manufacturer’s sticker inside the door lists the panel’s rated amperage. A label rating is the box’s ceiling, not proof the service behind it matches.
- Electric meter: a meter marked CL200 supports up to 200 amps, which is a strong hint the service was built for it.
- Service equipment documentation: utility guides for manufactured homes describe service equipment configured for 100-amp, 150-amp, or 200-amp direct wiring, so the meter and disconnect tell you which one you got.
Write down what you find. That reading is the number that matters when you call an electrician, because it decides whether a panel swap is a straight replacement or the front end of a service upgrade.
What Size Breaker Box Do You Need for a Mobile Home?
Match the box to the load, not to the label you wish you had. Mobile-home electrical panels are commonly sold in the 100–200 amp range, and the right pick comes down to what the home actually draws.
| Home Setup | Typical Service Size | Watch Out For |
|---|---|---|
| Small single-wide, gas heat, basic appliances | 100 amps | Tripping once you add a window AC unit or a space heater |
| Single-wide with electric water heater | 150–200 amps | Water heater plus range plus dryer running together |
| Double-wide with central air | 200 amps | Compressor startup draw on top of everything else |
| Home with electric heat or heat pump | 200 amps | Electric resistance heat alone can eat most of a 100-amp service |
| Home adding EV charging | 200 amps | Level 2 charging pulls 32–48 amps continuously on its own |
| Manufactured home built before the mid-1990s | Often 100 amps | Assuming the original service still meets today’s appliance loads |
| New manufactured home installation | 200 amps | Nothing — this is the current standard for new installs |
Add up the big loads before you decide: HVAC, water heater, range, refrigerator, dishwasher, dryer, and anything new like EV charging. If two of those are electric and high-draw, 100 amps runs out of room fast. When you’ve settled on 200, our roundup of the best 200 amp breaker box for a mobile home covers the models that fit manufactured-home service setups.
Why a Bigger Panel Label Doesn’t Mean More Power
Swapping in a 200-amp box does not create 200-amp service. A larger panel label alone means nothing if the feeder wires, meter socket, and service disconnect behind it are still rated for 100 amps — and undersized conductors feeding a bigger load is a fire risk, not an upgrade.
Three mistakes show up constantly. Assuming a 200-amp breaker box means the home has 200-amp service. Upgrading the panel without confirming the feeder size, meter socket, and service disconnect are rated to match. And picking 100 amps for a home with electric heat or electric HVAC, then overloading it the first cold snap. Utility guidance for manufactured homes is specific to manufactured homes for a reason, so generic site-built advice doesn’t transfer cleanly.
Before buying anything, verify the existing main breaker rating and equipment labels, then have a licensed electrician confirm the sizing against local code. The utility service manuals published by Wisconsin Public Service walk through the 100/150/200-amp service configurations and are worth reading before that call.
FAQs
Can a mobile home run on 100 amps with central air?
It can struggle. A 100-amp service may work if the air conditioner is small and the rest of the load is light, but compressor startup draw plus a water heater or range running at the same time is where breakers start tripping. Homes with larger central HVAC generally get 200-amp service instead.
Is 150 amps ever the right choice?
Yes, in a narrow middle ground. Manufactured-home service equipment can be built for 100, 150, or 200 amps, and 150 fits a home with moderate electric loads that doesn’t quite justify 200. It’s the least common option and often skipped because 200-amp equipment is easier to source.
Does the electric meter tell me my service size?
It gives you a strong clue. A meter marked CL200 supports up to 200 amps, so seeing one suggests the service was built for it. That said, the meter is one piece — confirm the main breaker rating and panel label before treating the number as final.
References & Sources
- NYSEG. “Section 15” Covers manufactured-home service equipment wiring configurations.
- Wisconsin Public Service. “Builders Manual, Section 2” Details 100, 150, and 200 amp service options for manufactured homes.
- Taylor County. “Mobile Home Pole” Supports service-size and equipment-rating guidance.
