Santa Clarita, CA · January 2021 · Southern California Edison / City of Santa Clarita

Santa Clarita: the module in the design was no longer made.

Nobody finds this out while drawing. It turns up the day somebody tries to buy the panels.

Written by the Cali Energy project team · California contractor license 1032379 · Updated September 2026

A module can be specified, drawn, quoted and approved while quietly going out of production, because nothing in the design process checks availability — the equipment list says a panel is certified, not that anyone still builds it. It surfaces at the order. On this Santa Clarita project the supplier came back saying the specified module was discontinued and offering a substitute. The swap was not approved — a different make has to be re-checked against the equipment list, the inverter and the load before it can go on a roof — so everything except the panels was released for collection. Cali Energy installed the array two days later and took the permit to a final the following week.

At a glance

System

26 modules, about 9,500 kWh a year

Module specified

Solaria 365 W, discontinued at the order

Roof

Concrete tile, recently replaced

Main panel

No upgrade required

Found at the order

The specified module was out of production

Installation to final

Six days

Utility / AHJ

Southern California Edison / Santa Clarita

The story

The project started the way the good ones do. The roof had just been redone — concrete tile, freshly laid — the main panel was adequate and needed no upgrade, and twenty-six modules were specified against a year of usage just under nine and a half thousand kilowatt-hours.

Then somebody tried to buy the panels.

The supplier came back the next morning: the Solaria 365 in the design is discontinued. Not out of stock — out of production. The substitute offered was an LG 350, a different make at a different wattage.

This catches people, so it is worth explaining why it happens so late.

Nothing in the design stage checks whether a panel is still being manufactured. The state equipment list tells you a module is certified and what its ratings are; it does not tell you the line was shut down last quarter. Plan check does not ask. The drawings do not ask. The first moment anyone tests the question is when a purchase order goes out, and by then the design is finished and sometimes permitted.

At that point there are three ways forward and they cost different things.

Take the substitute the supplier is offering. Fastest, and the one with the trap in it — a different make and model has to be checked against the equipment list, the inverter it pairs with, the layout it has to fit and the structural load, and if any of those move, the drawings are revised before the roof is.

Wait for the manufacturer's replacement model. The successor to a discontinued panel is usually close in size and a little better in output, which keeps the design intact. What it costs is weeks, and the date is a promise rather than a delivery.

Or shrink the array to what can actually be bought, which changes the production the whole project was sold on and is the worst of the three unless the shortfall is trivial.

The useful thing an owner can do is ask one question before signing: is every module and inverter in this design currently in production, and what happens if one of them is not. The answer will not prevent the problem — supply chains do what they do — but it establishes in advance who absorbs the delay and who decides on the substitute.

Here the panels were the only line held back. Everything else was released for collection the same afternoon, the crew installed five days later, and the final was booked for the Monday after that. It moved to the Tuesday, because the Monday was a federal holiday, and the report and the photographs went out the day it was held.

The array has been running since that inspection. The module that was supposed to be unobtainable cost this project five days, because the question was asked at the purchase order and not on the roof.

Cali Energy installed and finaled this array in Santa Clarita.

How it ran

Five days from a discontinued module to an installed array, six more to a signed-off permit.

What we did

• Caught the discontinuation at the purchase order rather than on installation day.
• Refused a same-day substitute that would have needed the drawings revised.
• Took delivery of everything except the panels so the installation date held.
• Kept the approved design intact rather than redrawing the project around stock.
• Kept the installation inside the same week the supply problem surfaced, and booked the final in the next one.

System specifications

Is your project like this one?

• Your quote names a module and you do not know whether it is still made.
• Your installer has offered a different panel at short notice.
• Your project has stalled waiting on equipment.
• You want to know what a substitution actually involves.

Cali Energy in Santa Clarita

Frequently asked questions

Can a solar module go out of production after the design is done?

Yes, and it is common. Nothing in the design stage checks availability — the state equipment list confirms a panel is certified and what it is rated at, not that it is still being built. The question is first tested when a purchase order goes out.

What are the options when the specified module is discontinued?

Three. Take the supplier's substitute, which has to be re-checked against the equipment list, the inverter, the layout and the structural load. Wait for the manufacturer's replacement model, which usually preserves the design but costs weeks. Or shrink the array, which changes the production the project was sold on.

Is a replacement model from the same manufacturer a safe swap?

Safer than a different brand, because the successor is normally close in dimensions and slightly better in output, so the layout and the load stay valid. It still has to be confirmed on the equipment list and against the inverter it pairs with.

What should I ask before signing a solar contract?

Whether every module and inverter named in the design is currently in production, and what happens if one of them is not. It does not prevent a supply problem, but it settles in advance who absorbs the delay and who chooses the substitute.

Does Cali Energy install solar in Santa Clarita?

Yes. Santa Clarita permits through its own Building & Safety Division and interconnects through Southern California Edison. Concrete tile is common on these tracts, so the roof and the equipment order are both part of the schedule rather than afterthoughts.

What this would look like on your roof

Related

• The module changed before anything went up Eagle Rock, Los Angeles · what has to be rechecked when the panel changes Solar
• The contract named a module. The warehouse had a different one Simi Valley, CA · 21 modules · what makes a substitution acceptable Solar
• The array went on the west roof, not the east Santa Clarita · 8.14 kW · the side changes the output, not the count Solar
• A module broke on the day of the install Atwater Village, Los Angeles · 7.02 kW · why the gap cannot be left Solar

This timeline reflects this property and this permitting path. Updated September 2026.