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Told You Need a Panel Upgrade?

Adding solar, a battery, an EV charger or a heat pump often brings the words “you need a panel upgrade.” Sometimes you do. Sometimes there are other options. Here’s how to tell.

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What it usually means

There are a few different reasons someone may say this, and it helps to ask which one applies to you:

  • Not enough capacity for the new loadThe electrical code has a method for estimating how much power a home really uses, called a load calculation. If an EV charger, heat pump or electric range pushes that past what your service can supply, something has to change.
  • Solar or battery limits on the panelThe code limits how much power solar and batteries can feed into a panel’s bus bar, based on the bus and main breaker ratings. A smaller or older panel can run out of room, even if your usage is fine.
  • No space, or an old or problem panelA full panel, a fuse box, or a panel brand with known problems is a common reason to replace rather than add on.
  • PG&E’s sideFor a new load, PG&E reviews whether the lines and transformer serving your home can handle it. That review happens through an application in PG&E’s Your Projects portal (PG&E).

Safe for you to check

  • Read the number on your main breaker (often 100, 125, 150 or 200) and count open breaker spaces. Snap a photo.
  • Make a list of what you’re adding (EV charger, solar size, battery, heat pump) and what you already have.
  • Ask the installer for their reasoning: a load calculation, a solar bus limit, no space, or PG&E.
  • Try our free panel capacity check for a rough idea before anyone comes out.
  • Ask about alternatives, like load management or a smaller charger setting. PG&E has also announced a program called PanelBoost for eligible single-family homes with a 150-amp or smaller panel; as of this writing it has a waitlist (PG&E).

Leave these alone

  • Don’t open the panel to count or check anything behind the cover.
  • Don’t let anyone add solar, batteries or a big circuit without a permit and inspection.
  • Don’t assume an upgrade is the only answer, or that it’s never needed. It depends on your home.

How IES helps

  1. 1
    A straight second opinion

    We look at your panel and service, run the load calculation, and tell you honestly whether you need an upgrade, or whether something smaller like a load management device or a different connection method will do.

  2. 2
    If you do need it, we handle everything

    We submit the PG&E application, pull the permit, do the work, meet the inspector, and schedule PG&E’s disconnect and reconnect. You just say yes.

  3. 3
    Free estimate

    Estimates are free, and we’ll walk you through the PG&E steps so there are no surprises.

Estimates are free. Call (530) 401-7419, answered 24/7, or use the form below.

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Common questions

Do I need a panel upgrade for solar?

Not always. It depends on your panel’s bus and main breaker ratings and the size of the system. Sometimes there are code-allowed ways to connect solar without replacing the panel. A licensed electrician can check your specific panel.

Do I need a panel upgrade for an EV charger?

Often not. A load calculation shows how much room you have. Many homes can add a charger, sometimes with a lower charging setting or a load management device. Some homes do need an upgrade.

What is PG&E PanelBoost?

PG&E describes it as a smart panel that connects at your utility meter and balances energy use so you can add large appliances without overloading your existing panel. PG&E lists eligibility such as a single-family home with a 150-amp or smaller panel, and as of this writing it has a waitlist.

How does PG&E fit into a panel upgrade?

For new load, an application goes through PG&E’s Your Projects portal and PG&E checks whether its lines and transformer can handle it. After the new panel passes inspection, PG&E reconnects power. We handle those steps for you.

Is the installer wrong if they said I need one?

Not necessarily. They may be right. A second opinion just helps you understand why, and whether there’s another option that fits your budget and plans.

Read more

Related problems

Request a free estimate

Free estimates, no pressure. Tell us a little about the job and we’ll get back to you. Or call (530) 401-7419, answered 24/7.

Name, a short description, and a phone number or email, please. We only use them to reply to you.

Use the full form

Sources

General safety information for homes, checked against the sources above in November 2026. Every home is different and this is not a substitute for an on-site look by a licensed electrician. Never work inside a panel, at the meter or on live wiring. In an emergency, call 911.