What size electrical panel do most Johnston homes need?

Most Johnston homes upgrade to a 200-amp panel, which covers a modern kitchen and an EV charger with room left for a couple of dedicated 240-volt circuits. Larger properties adding a shop or a whole-home generator sometimes need 320-amp service instead. We run the load calculation on site so the panel size matches real power draw rather than a generic recommendation pulled from a chart.

How long does it take to complete an electrical panel upgrade in Johnston, IA?

The time we need to complete your upgrade depends on the overall project. Generally, a single-panel swap usually finishes in one day, including the breaker box replacement and reconnecting existing circuits. But a project that also involves a subpanel or knob-and-tube replacement runs longer. The Johnston Building Department requires a permit and an inspection for every job, and we build that inspection into the timeline so the finished work is fully code-compliant before anything gets energized.

Can a panel upgrade help with power outages and surges?

A new panel accepts whole-home surge protection at the main breaker, which handles the voltage spikes that come with Iowa's spring storm season. It's also the right foundation for a generator transfer switch if backup power matters during an extended outage. Homes adding battery storage or a future solar setup need that additional capacity, since older fuse boxes weren't designed for two-way power flow.

How do I know if my Johnston home needs a panel upgrade?

Breakers tripping more than once a month or a panel that still uses screw-in fuses both point to a panel running past its limit. So do lights flickering when the AC or oven kicks on. Many Johnston homes from the 1990s and 2000s were built with 100-amp service, which worked fine before EV chargers and whole-house electronics became standard. Planning an EV charger installation or a home addition? Get the panel checked before that new circuit gets added, not after.

Does Mr. Electric of Central Iowa offer other residential electrical services nearby?

Beyond panel upgrades and electrical panel replacements, our Johnston electricians handle: Circuit breaker replacement EV charger installation Whole-home surge protection Generator installations and backup power solutions Electrical safety inspections Wiring upgrades Lighting installations GFCI outlets and smart switches often get added during the same visit. Most of these pair naturally with a panel upgrade, since a right-sized panel is what gives the rest of the electrical system room to grow.

How do I book a panel upgrade or electrical panel replacement in Johnston, IA?

Call or book online with Mr. Electric of Central Iowa, and we'll walk through your current setup, your actual power needs, and a firm timeline before any work starts. Whether it's replacing an outdated electrical panel or you're just looking to add capacity for a Level 2 electric vehicle charger, schedule an appointment , and we'll confirm the permit details up front so there are no surprises on install day.

Electrical Panel Upgrade Johnston, IA

Johnston Homes Are Outgrowing Their Original Panels

The Johnston electricians at Mr. Electric of Central Iowa regularly upgrade electrical panels, replacing tired 100-amp fuse boxes and worn breaker panels that can't handle an EV charger or a hot tub on top of a full kitchen. Breakers tripping weekly? Lights dimming when the AC kicks on? That's not a quirk. It's a panel running past its rated capacity, and it's worth fixing before something overheats. Call to book your electrical panel upgrade in Johnston, IA!

Johnston Homes Are Outgrowing Their Original Panels

Mr. Electric electrician showing circuit breaker board to two people.

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What’s Actually Involved in an Electrical Panel Upgrade: Johnston, IA

Homes built in Johnston during the 1990s and 2000s growth years typically shipped with 100-amp or 150-amp service, sized for a much smaller electric load than a house carries today. Add a Level 2 EV charger or a spa tub, and that panel starts falling behind. Breakers trip. Lugs run warm. Our Des Moines electricians size the replacement to your real power draw. 200 amps covers most upgrades now, and 320-amp service is available for houses adding a subpanel for a detached shop or a future solar PV array with battery storage.

The work starts with a load calculation, not a guess. We check every circuit breaker for double-tapped lugs and corroded grounding, then flag any knob-and-tube wiring or aluminum branch circuits still feeding the property. The replacement panel gets arc-fault and ground-fault circuit interrupters on the circuits the National Electrical Code requires. Every job also runs through Polk County for permitting and inspection before we energize anything. Most single-panel swaps finish in one day, so the home isn't without power overnight.

A properly sized panel opens the door to a dedicated EV charger circuit or a whole-home generator transfer switch. It can also feed a second panel for outdoor lighting and landscape circuits, things a maxed-out 100-amp box simply can't carry without tripping the main breaker. That's the same math behind an electric range and a window AC unit competing for power on a sweltering Iowa afternoon.

15 Years of Reliable Panel Work Across Polk County: Call Mr. Electric Today

Mr. Electric of Central Iowa has been servicing Des Moines area homes since 2001, with our residential electricians averaging 15 years of trade experience. That time on the job gives us clear insight into what fails around Johnston—typically corroded lugs caused by high summer humidity or legacy fuse boxes left untouched since construction. Local voters recognized our work by naming us the Des Moines area's best electrician in 2024 and 2025, a track record we bring directly to Green Meadows West and every Johnston neighborhood we visit.

The same crew that handles electrical panel services in Johnston also covers Urbandale and Grimes for family members living nearby, plus Ankeny and Polk City a bit further out. A documented, permitted 200-amp installation adds real resale value too, since an outdated panel is one of the first things a home inspector flags. Contact us today to get a panel upgrade scheduled for your Johnston home.

2759 86th St Ste 110 Urbandale, IA 50322, USA

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Frequently Asked Questions About Electrical Panel Upgrades: Johnston, IA

Breakers tripping more than once a month or a panel that still uses screw-in fuses both point to a panel running past its limit. So do lights flickering when the AC or oven kicks on. Many Johnston homes from the 1990s and 2000s were built with 100-amp service, which worked fine before EV chargers and whole-house electronics became standard. Planning an EV charger installation or a home addition? Get the panel checked before that new circuit gets added, not after.
Most Johnston homes upgrade to a 200-amp panel, which covers a modern kitchen and an EV charger with room left for a couple of dedicated 240-volt circuits. Larger properties adding a shop or a whole-home generator sometimes need 320-amp service instead. We run the load calculation on site so the panel size matches real power draw rather than a generic recommendation pulled from a chart.
The time we need to complete your upgrade depends on the overall project. Generally, a single-panel swap usually finishes in one day, including the breaker box replacement and reconnecting existing circuits. But a project that also involves a subpanel or knob-and-tube replacement runs longer. The Johnston Building Department requires a permit and an inspection for every job, and we build that inspection into the timeline so the finished work is fully code-compliant before anything gets energized.
A new panel accepts whole-home surge protection at the main breaker, which handles the voltage spikes that come with Iowa's spring storm season. It's also the right foundation for a generator transfer switch if backup power matters during an extended outage. Homes adding battery storage or a future solar setup need that additional capacity, since older fuse boxes weren't designed for two-way power flow.
Beyond panel upgrades and electrical panel replacements, our Johnston electricians handle:
- Circuit breaker replacement
- EV charger installation
- Whole-home surge protection
- Generator installations and backup power solutions
- Electrical safety inspections
- Wiring upgrades
- Lighting installations
GFCI outlets and smart switches often get added during the same visit. Most of these pair naturally with a panel upgrade, since a right-sized panel is what gives the rest of the electrical system room to grow.
Call or book online with Mr. Electric of Central Iowa, and we'll walk through your current setup, your actual power needs, and a firm timeline before any work starts. Whether it's replacing an outdated electrical panel or you're just looking to add capacity for a Level 2 electric vehicle charger, schedule an appointment, and we'll confirm the permit details up front so there are no surprises on install day.

Residential & Commercial Services

Residential
Commercial