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Your Solar Installer Sets Panels. We Handle The Electrical Side.

Pearl City PV and battery tie-ins: backfeed breaker, AC disconnect, busbar capacity, panel prep, and the HECO interconnection paperwork that keeps a finished array from sitting dark.

Solar Interconnect · Pearl City

Solar is two trades. We are the second one.

Most people picture a solar job as panels going on the roof. That part is the solar installer. The other half is electrical, and it is where jobs stall. Somebody has to land the array into your service panel: pick the tie-in method, set the backfeed breaker or the tap, mount a lockable AC disconnect, label everything the way an inspector and the utility both want to see it, and make sure the panel can legally carry what is being pushed into it. That is our half, and we do it on Pearl City homes every month.

We work with whatever equipment you already have. Sometimes a homeowner books us with a PV company already lined up and we take the electrical scope. Sometimes an array has been sitting on a roof for six weeks not producing a watt because the panel would not accept the breaker as wired. Sometimes it is an older system that needs re-tying after a service upgrade, or a battery getting added to a five-year-old array. All of those are the same conversation: what can your panel take, what does it need, and what will it cost. You get that answer as a written quote with the options laid out, not a shrug on the driveway.

Pearl City housing stock is the reason this comes up so often here. A lot of the neighborhoods off Kamehameha Highway and up the slope toward Waimalu and Momilani were built when 100 amps was plenty of service for a family house. Those panels are full, they are old, and their busbars were never rated for someone backfeeding solar into them decades later. Add the central Oahu reality that most of these homes now also run split ACs and at least one car that wants charging, and the original service is doing work it was never sized for. Solar is usually the moment that catches up with a homeowner.

None of that means you cannot go solar. It means the electrical has to get sorted first, and it is far cheaper to know that before the panels are ordered than after they are hanging. We read the panel, run the numbers, and give you a straight answer on whether it takes the system as-is, needs a smaller main breaker, needs a tap ahead of the main, or needs a full service and panel upgrade. Then you decide with real information instead of finding out at inspection.

Solar AC disconnect and backfeed breaker at a residential service panel in Pearl City, HI

What We Take Care Of

The electrical scope of a Pearl City solar project, start to inspection sign-off.

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Panel capacity check firstWe read the busbar rating and main breaker and run the 120 percent math before anybody commits to a tie-in method.
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The right tie-in methodBackfeed breaker, main breaker derate, or a supply-side tap ahead of the main, chosen for your actual panel.
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Disconnect and labelingLockable AC disconnect mounted where the utility can reach it, plus every placard code and HECO ask for.
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Battery-ready panel prepRoom left for a storage tie-in and a protected-loads sub-panel, so adding batteries later is not a rebuild.
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Permit and HECO paperworkElectrical permit pulled and the interconnection application matched to what actually got installed.
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Carried through inspectionWe stay on it until the inspector signs and the system is legal to switch on, corrections included.

How The Job Runs

Four steps from reading your panel to a system that is cleared to produce.

01

Read The Panel

Service size, busbar rating, main breaker, and what is already loaded on it. Photos and numbers, on site.

02

Pick The Method

We run the calculation and price the compliant paths in writing, including the panel work if the panel needs it.

03

Wire And Label

Breaker or tap, AC disconnect, conduit, and the full placard set installed clean and to code.

04

Permit To PTO

Permit and HECO interconnection coordinated and carried through inspection and utility approval.

Why Sparky

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Math Before Metal

The busbar calculation happens before we order anything, which is why our tie-ins are not the thing holding up your PTO.

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Any Installer, Any Vintage

New arrays, orphaned systems, re-ties after a service upgrade, batteries added to older PV. We are not tied to one brand.

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Licensed And Insured

Jerry has been an electrician since 1990. Licensed, insured, and the name on the truck is the family doing the work.

Questions We Get In Pearl City

What is the 120 percent rule, in plain words?
The metal bar inside your panel that all the breakers clip onto has a rating, usually 100, 125, or 200 amps. Power comes in through the main breaker and solar pushes in from the other end. Code lets the two of them together add up to 120 percent of that bar’s rating, and no more. So a 100 amp bar with a 100 amp main has only 20 amps of room left, which is not much solar. That one number decides most of what happens next on your job.
My panel does not have room. Now what?
Three normal paths. Swap the main breaker for a smaller one, which frees up room on the bar as long as your household load supports it. Tap ahead of the main instead, so the solar never touches the bar at all. Or upgrade the service and panel, which is the right call when the panel is old, full, or already struggling. We price whichever ones apply to your house and tell you which we would pick and why.
Do you install the solar panels as well?
No. The array, the racking, and the inverters are the solar installer’s scope. We are the licensed electricians who make the connection to your house right: the tie-in, the disconnect, the panel work, the labeling, and the permit. Plenty of homeowners hire us directly alongside their PV company, and plenty of PV companies call us for the electrical when a panel turns out to need work.
My system is installed but still not turned on. Can you fix that?
That is one of our most common calls, and it is usually one of three things. The busbar will not legally take the backfeed as it was wired. The disconnect or the labeling is missing or wrong. Or the paperwork filed with the utility does not describe what actually got built. We look at the panel and the tie-in, correct the electrical, and get the permit and interconnection documents lined up with reality so it can be cleared.
I want batteries eventually. Should I do anything now?
Yes, and it costs very little while the panel is already open. Storage needs its own tie-in and, if you want the lights on during an outage, a small sub-panel carrying the circuits that matter: fridge, a few lights, the router, maybe a fan. Leaving space and a path for that now means adding batteries later is a day of work instead of tearing the whole thing apart. Tell us it is coming and we will build for it.
We are adding an EV charger too. Same trip?
Makes sense to do both at once. A charger and a solar tie-in are pulling on the same panel capacity, so sizing them together avoids paying twice for panel work. If the service is getting upgraded anyway, that is the cheapest moment to run the charger circuit to the carport or garage. See our Pearl City EV charger installation page, or just tell us both plans when you call.
How long does the electrical side take?
The wiring itself is usually a day, sometimes two if the panel is being replaced at the same time. The longer part is outside our hands: permit turnaround and the utility’s interconnection review. What we control is that nothing gets kicked back for our work. Clean install, correct labels, documents matching the build. That is what keeps the calendar moving.
How do I get a number for my house?
Call or send us a message with a photo of the inside of your panel, the sticker showing its rating, and the size of the system you are planning. Nine times out of ten that is enough for us to tell you which direction you are headed. We confirm on site and put the written quote in your hands before any work starts. Reach us through the contact page or at (808) 342-8195.

Other Pearl City Services

Panel Upgrades200A service when the busbar is out of roomSee the page → EV Charger InstallSize the charger and the array togetherSee the page → All Pearl City WorkResidential and commercial menuSee the page →

Find Out What Your Pearl City Panel Can Take

Send a photo of your panel and the system size you are planning. We run the numbers and come back with a written quote and the options in plain English.

Book A Free Look → ☎ (808) 342-8195

Talk To Sparky & Sons LLC

Jerry and the boys answer the phone. Tell us what you are planning and we will give you a straight answer.

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