The distinction that decides your price
Full, or undersized? They're not the same problem
From the outside these look identical — both mean you can't add what you want. The fix, and the bill, are nothing alike.
No slots left for more breakers. The service feeding it may be entirely adequate — you've simply run out of room.
Solved with a panel replacement offering more spaces, or a subpanel. Both considerably cheaper than involving the utility.
The total power coming into the building isn't enough for the demand, regardless of how many slots the panel has.
Involves the utility, the meter, and the service entrance conductors — a materially bigger project.
It accounts for square footage, heating and cooling, cooking, water heating, laundry, and any large dedicated loads — and it produces a number you can compare against your service size.
Plenty of homes run perfectly well on 100-amp service. Whether yours does isn't a matter of opinion, and "you'll want 200 amps" delivered before any calculation is a sales position rather than an assessment.
Where the calculation genuinely does show a service upgrade is warranted — electric heating plus EV charging, for example — you'll see the numbers behind it.
Five starting points
Which one are you?
Each leads somewhere different. Tell us which when you call.
Anatomy
What's actually in there, and what fails
Understanding the parts explains why panels reach end of life.
- The main breaker. Disconnects the whole panel and protects the service. It's mechanical, it operates under load, and it wears.
- The bus bars. The metal conductors distributing power to every breaker — the part nobody sees, and where the serious problems live. Corrosion, pitting from arcing, and burn damage at breaker contact points. Bus damage is generally not repairable, and it's the most common reason a panel that "just needs a new breaker" actually needs replacing.
- The breakers. Protective devices with a finite life. Contacts fatigue, mechanisms stiffen, and a breaker that has tripped many times may not trip reliably again.
- The neutral and ground bars. Where every circuit's return and grounding conductors terminate. Loose or corroded terminations here cause faults that look like circuit problems.
- The enclosure and terminations. The connections at the top where the service lands. Heat, corrosion, and moisture ingress show up here first.
What fails, in order: terminations loosen and heat, breakers wear, bus bars pit and corrode, and moisture gets in. None of it is dramatic. All of it is progressive.
Check your label
Panels with documented problems
Some older panel types have well-recorded histories of this failure mode. Federal Pacific Stab-Lok, Zinsco, and Sylvania-Zinsco panels come up most often in inspection reports and insurer questionnaires.
Pushmatic and Challenger appear too, with the additional practical issue that legitimate replacement breakers can be difficult or impossible to source.
If your panel label shows one of these, that's the reason inspectors flag it and insurers ask about it. Worth an assessment on a scheduled visit rather than a discovery during an incident.
Fuse panels are a related case. An intact fuse panel isn't automatically unsafe, but capacity is limited, an oversized fuse defeats the protection entirely, and many insurers now object to them regardless of condition.
Aluminum branch wiring frequently surfaces during panel work. It's a separate issue with its own remediation options, and we'll tell you if it's present.
Take this to every bidder
Where quotes differ
If bids on the same job vary widely, it's almost never the panel itself. It's these seven.
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Grounding and bonding
Older properties frequently have grounding electrode systems that no longer meet current requirements, and replacing a panel typically triggers bringing that up to standard — ground rods, bonding to water and gas piping where required, correctly sized conductors. It's real work. A quote that doesn't mention it either hasn't looked or intends to raise it later.
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Protective devices
AFCI and GFCI breakers cost substantially more than standard ones, and a new panel usually means circuits get the protection current requirements call for. Omitting them makes a number look competitive.
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Meter base and service entrance
On a service upgrade these frequently need replacing alongside the panel. Quoting the panel alone understates the job.
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Utility coordination
Disconnect and reconnect must be scheduled, and in some areas carries a fee.
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Permit and inspection
Occasionally left out. They're not optional.
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Wall condition afterward
New enclosures are sometimes larger than the old ones. Ask what state the wall will be in and who's fixing it.
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Circuit labelling and testing
Should be included. Ask whether it is.
Put those seven to every bidder and the spread will usually explain itself.
Why Silverthorne calls us
What you get when you call Frontier Electric
The calculation comes before the recommendation
And you see it. Any upgrade proposal should be able to show its working.
We'll propose the smaller job where it fits
Subpanels and panel replacements solve a lot of situations that get quoted as service upgrades.
Everything in one number
Including grounding, bonding, protective devices, permit, utility coordination, and what the wall looks like afterward.
Permitted and inspected
We pull the permit, coordinate the utility disconnect and reconnect, and hand you the sign-off.
Properly labelled at handover
Every circuit identified and legibly recorded. It sounds minor right up until the next emergency.
What we do
Our panel services in Silverthorne, CO
Panel replacement
New panel on the existing service, with every circuit re-terminated, tested, and labelled.
Service upgrades
Increasing incoming capacity — coordinated with the utility, including meter base, service conductors, and mast or riser where required.
Subpanel installation
Added capacity for a garage, workshop, addition, or suite without necessarily replacing the main panel.
Load calculations
Establishing actual demand before a purchase, a renovation, or a large new load.
Fuse panel replacement
Converting to modern breaker panels, with the grounding and protection work that usually accompanies it.
Obsolete panel replacement
Panel types with documented failure histories or unobtainable parts.
Grounding and bonding upgrades
Bringing the grounding electrode system and bonding to current requirements.
AFCI and GFCI protection
Adding required protection as part of the new panel.
Breaker diagnosis and replacement
Breakers that won't hold, trip under normal load, or have failed mechanically.
Panel relocation
Moving panels that are inaccessible, in a prohibited location, or in the way of a renovation.
High-load circuit preparation
Capacity and circuits for EV charging, heat pumps, hot tubs, and shop equipment.
On the day
The day your power is off
The utility disconnects the service for the swap and reconnects afterward. Scheduling that is often what sets the date rather than our availability.
Expect several hours to a full working day without power for a straightforward replacement. You'll get a realistic window in advance.
Plan for it:
- Refrigeration and freezers — keep them shut, and consider what's in them
- Anyone working from home
- Medical equipment that needs power
- Pets in a property that will get warm or cold
- Sump pumps if rain is forecast
The old panel comes out, the new one goes in, and every circuit is re-terminated into the new enclosure — which is also when mislabelled and mystery circuits get identified properly. Grounding and bonding are brought up to current requirements, protective devices are installed, everything gets tested and labelled, and inspection is coordinated.
Service upgrades add meter base and service entrance work, sometimes a mast or riser, and a longer overall timeline.
How it works
Our process
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Assessment
Existing panel, service size, grounding, condition, and what you're planning to add.
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Load calculation
The numbers that determine panel, subpanel, or service upgrade.
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Written quote
Full scope, including every item on the seven-point list above.
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Permit and utility scheduling
Permit pulled, disconnect and reconnect arranged, outage window confirmed with you.
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Installation
Panel replaced, circuits re-terminated, grounding and bonding completed, protection installed.
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Testing, labelling, inspection
Every circuit tested and identified, inspection completed, documentation handed over.
The indirect costs
Insurance, inspections, and selling
Panels cost people money indirectly more often than directly.
- Insurers decline, surcharge, or attach conditions for fuse panels, certain panel brands, 60-amp service, and aluminum branch wiring. If a renewal has come back with a question, this is usually why.
- Home inspectors routinely flag panel age, brand, double-tapping, missing protection, and inadequate grounding. Those findings become price negotiations at the moment you have the least leverage.
- Buyers ask whether work was permitted. A documented upgrade is an asset; an undocumented one invites doubt about everything else.
Keep the permit and inspection sign-off somewhere you'll find it later.
Planning ahead
While you're at it
If the panel is being replaced anyway, the marginal cost of planning ahead is low.
- EV charging is the most common near-term addition, and it needs both capacity and a slot.
- Heat pumps and electric heating add significant load.
- Induction cooking has a different demand profile than gas.
- Solar or battery storage carries its own interconnection requirements, and the panel is central to them.
- Detached garages, workshops, and suites are usually better served by a subpanel than by long individual runs.
Mention anything on the horizon and the calculation can account for it now rather than in three years.
Commercial
Commercial panels and distribution
We handle panels and distribution for restaurants, retail, offices, warehouses, and multi-unit residential buildings across Silverthorne.
Commercial work brings three-phase supply, larger service equipment, multiple distribution panels, and load profiles driven by equipment rather than occupancy. Kitchen equipment, refrigeration, HVAC, and machinery change the calculation substantially, and phase balance becomes a real consideration.
Shutdown planning matters more than anywhere else: we define the outage window in advance and schedule around trading or production where the work would otherwise close you.
Pricing
What affects the cost
- Panel replacement versus full service upgrade — the dominant factor.
- Service size, and whether the utility, meter base, and service entrance are involved.
- Number of circuits to re-terminate, test, and label.
- Grounding and bonding — how far the existing system is from current requirements.
- Protective devices — AFCI and GFCI breakers versus standard.
- Panel location — accessible wall versus cramped closet, or a relocation.
- Mast, riser, or meter work on service upgrades.
- Permits, inspection, and utility fees — variable by jurisdiction.
- Wall repair where enclosure sizes differ.
One written quote covering all of it, before work begins.
Service area
Areas we serve near Silverthorne
Frontier Electric proudly serves Silverthorne, CO and the surrounding neighborhoods, upgrading residential and commercial electrical panels throughout the area. Unsure whether you're in range? Call and ask.
Questions
Frequently asked questions
What's the difference between a full panel and an undersized service?
Full means no physical space for more breakers. Undersized means not enough total power coming in. Different problems, very different prices — the load calculation tells them apart.
How much does a panel upgrade cost in Silverthorne?
It depends primarily on whether you need a panel replacement or a full service upgrade involving the utility and meter. You'll get one written quote covering permits, grounding, and protection — not just the panel.
How do I know what service size I have?
The main breaker rating, usually marked 60, 100, 125, or 200. Photograph it along with the panel label and we can tell you a lot before visiting.
Do I need 200-amp service?
Only if the load calculation says so. Many homes run fine on 100 amps. If the panel is simply full rather than under-supplied, a replacement panel or a subpanel is usually the cheaper correct answer.
How long will my power be off?
Typically several hours to a full working day for a straightforward replacement. You'll have a realistic window in advance.
Do I need a permit?
Yes. Panel work is permitted, inspected work. We handle it and provide the documentation.
My panel is a Federal Pacific or Zinsco. Is that a real problem?
Those brands have documented histories of breakers failing to trip, and parts availability is poor. It's why inspectors flag them and insurers ask.
Can I add circuits without replacing the panel?
Sometimes — if there's physical space and the service supports the load. Where capacity exists but space doesn't, a subpanel is often the answer.
Why is one quote much lower than the others?
Usually grounding and bonding, AFCI and GFCI breakers, permits, or meter and service entrance work left out. Ask each bidder specifically about those.
Will a new panel fix my flickering lights?
Sometimes, if the cause is a failing panel or a loose termination in it. Flickering can also indicate a neutral fault elsewhere, which is a different and more urgent repair. Diagnosis first.
Do I need an upgrade before installing an EV charger?
It depends on existing capacity and what else is on the service. A load calculation answers it — some homes need nothing at all.
Will this satisfy my insurer?
Usually, where the concern was panel type, fuse panel, or service size. Keep the permit and inspection documentation, since that's what they'll ask for.
What condition will the wall be in afterward?
Worth asking any contractor. Enclosure sizes vary. We'll tell you up front what's included and where our scope ends.
Two panels, same symptoms, very different bills
A panel that's out of space and a service that's out of capacity look identical from the outside — both mean you can't add what you want. One is solved with a panel or a subpanel. The other involves the utility, the meter, and the service entrance.
Frontier Electric runs the calculation, shows you which you have, and quotes the whole job.