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Electrical Panel Upgrades on Oahu

100A→200A and 200A→400A upgrades for modern loads — EVs, AC, induction ranges — across Aiea, Honolulu, Kailua, and Kaneohe.

Panel Upgrade

More Amps. More Headroom.

A 100A panel made sense in 1975, when a typical home had a fridge, a stove, and a window AC unit. In 2026, with EV chargers, heat pumps, induction ranges, and high-power dryers, a 100A panel runs out of headroom fast. Symptoms: breakers tripping during dinner, the AC kicking off when the dryer runs, or a HECO bill that doesn’t add up.

Sparky and Sons does panel upgrades from 100A to 200A or 400A as a focused specialty. We handle the HECO disconnect coordination, the meter-base swap, the new panel, the bonding and grounding, and the inspection sign-off. Most upgrades complete in a single working day with the home back to full power by evening.

For homes planning to add EV charging, a heat pump, or solar in the next 5 years, a panel upgrade is often the single best electrical investment you can make — it unlocks every other modernization.

Electrical panel upgrade in an Aiea, Hawaii home by Sparky and Sons

What’s Included

Every panel upgrade job covers the same scope — here’s exactly what you’re getting when you book us.

✓
HECO disconnect coordinationWe schedule and coordinate the temporary disconnect — you don’t call HECO.
✓
Meter base & mastNew meter base and weather-tight mast where needed.
✓
Main service panelSquare D QO, Siemens, Eaton — UL-listed and rated for your service size.
✓
All new breakersNew breakers for every existing circuit, properly sized and labeled.
✓
Bonding & groundingCode-compliant grounding electrode and bonding to water/gas where required.
✓
Permit & inspectionCity & County permit, electrical inspection, sign-off documentation.

How It Works

Four steps from first call to written warranty. No surprises along the way.

01

Assessment

Walk your existing panel, check service entrance, propose 200A or 400A based on load.

02

Permit & HECO

Pull permit, schedule HECO disconnect (usually 1–2 weeks lead).

03

Install Day

Disconnect at HECO, swap meter base and panel, reconnect by evening.

04

Inspect & Sign-Off

Inspector visit (usually next day), label panel directory, deliver sign-off.

Why Sparky

✓

Single-Day Install

In and out in one working day. Power off only during the actual swap (3–5 hours).

★

HECO Coordination

We handle the disconnect/reconnect appointment so you don’t have to.

⚡

Future-Sized

Panel sized for your 5-year plan, not just today — EV, solar, heat pump-ready.

Frequently Asked Questions

How long will my power be off during the upgrade?
Typically 3–5 hours during the actual swap. We coordinate the HECO disconnect for the morning so you have power back by evening.
Do I need to be home?
Yes — HECO requires the homeowner present for the disconnect/reconnect. We’ll let you know the schedule a week ahead.
Will my appliances need to be replaced?
No — appliance circuits stay the same. The panel just gives you more total amperage to work with.
How much does a panel upgrade cost?
Varies by service size and complexity, but typical 100A→200A residential upgrades on Oahu run a few thousand dollars. We give a flat written quote on the first visit.

Related Services

Panel ReplacementResidential serviceLearn more → EV Charger InstallationResidential serviceLearn more → Generator InstallationResidential serviceLearn more →

Get a Free Panel Upgrade Quote

Written estimate on the first visit. No surprise charges, no salesman act — just a licensed electrician answering your questions.

Request Free Estimate → ☎ (808) 342-8195

Ready to Get Started?

Contact Sparky and Sons LLC today for a free, no-obligation estimate. We look forward to working with you.