8 Signs You Need an Electrical Panel Upgrade in Twin Falls

You probably need a panel upgrade if breakers trip often, your panel is full or very old, or you are adding big loads like an EV charger, heat pump or hot tub. An undersized or failing panel is both a nuisance and a safety risk. Here are the eight most common signs.

1. Breakers trip repeatedly

Occasional trips happen, but frequent ones mean your circuits — or the panel itself — cannot keep up. Start with why breakers trip.

2. The panel is 25+ years old or has a known problem brand

Federal Pacific (Stab-Lok), Zinsco and some Pushmatic panels have documented concerns, and many insurers and inspectors flag them. See Federal Pacific panels and Zinsco and Pushmatic panels.

3. You have a 60A, 100A or fuse-based service

Modern homes with electric ranges, dryers, A/C or heat pumps commonly need 200A. A 100A panel may be fine for a small older home, but it leaves little room to add anything. Our panel size guide explains how to size a service.

4. You are adding a big load

• An EV charger
• A heat pump or central A/C
• A hot tub or spa
• A detached shop — see subpanel installation
• A home addition or standby generator

5. The panel is full or crowded

No open breaker spaces, or multiple wires under a single breaker (double-tapping), means the panel has run out of capacity. Adding tandem breakers is a stopgap, not a fix.

6. Lights dim or flicker when appliances start

Dimming when the A/C or dryer kicks on can point to an overloaded service or loose connections. See why lights flicker.

7. Heat, buzzing, rust or a burning smell at the panel

These are urgent. Turn off what you can, stay clear of the panel and call right away — see emergency electrician.

8. Your insurer or home inspector flags it

Some Idaho insurers require replacement of certain panels or updated service on older homes, and buyers’ inspectors often flag them. See electrical problems found in home inspections.

How big a panel does your home need?

Only a load calculation gives the real answer for your house. Our panel size guide explains how it works.

Panel upgrade, service upgrade or subpanel?

• Panel replacement: a new panel and breakers at the same service size — right for a worn-out or unsafe panel.
• Service upgrade: a larger service (for example 100A to 200A) that may involve new service wires, meter base and the utility. See the Idaho Power service upgrade process.
• Subpanel: a second panel that adds circuits for a shop or addition without replacing the main. See subpanel installation.

What to expect on upgrade day

1. We confirm the permit and any utility coordination beforehand.
2. Power is shut off at the start of the work and stays off for part of the day while the panel is swapped.
3. The new panel is wired, every circuit is labeled and tested, and surge protection can be added at the same time.
4. The City of Twin Falls inspector verifies the work, and we hand you the documentation for your records and your insurer.

Insurance and resale

A documented, permitted panel upgrade answers the questions insurers and buyers’ inspectors ask about older panels. It is not a guarantee of a lower premium or a higher sale price, but it removes a common reason for delays. Keep the permit and inspection paperwork with your home records.

Panel upgrade FAQ

How do I know what size panel I need?

A load calculation counts your current and planned loads. Many homes need 200A; larger homes with EV charging, heat pumps and a shop may need 400A. See the panel size guide.

Do I need a permit for a panel upgrade?

Yes. See electrical permits. We pull it and schedule the inspection.

Will the power be off during an upgrade?

Yes, for part of a day while the panel is swapped. We plan the outage with you.

Is a panel upgrade the same as a service upgrade?

A panel replacement can keep the same service size; a service upgrade increases capacity and may involve the utility. See the Idaho Power service upgrade process.