Brentwood, CA · February – September 2023 · LADWP / LADBS

Brentwood: five modules went on after the meter.

The utility set the meter on a Saturday and told the owner the system could run. Part of the system was not on the roof yet.

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

Permission to operate is granted against the approved design, not against a count of modules on the roof on the day. A system can therefore be energized while part of the approved array is still to be installed, provided what goes on afterwards is what the drawings already showed. On this 9.9 kW Brentwood project the meter was set and permission to operate issued on a Saturday, and Cali Energy installed the remaining five modules three days later.

At a glance

System

9.9 kW AC-CEC

Inverters

One microinverter per module

Permission to operate

Before the array was complete

Remaining modules installed

Three days later

Quote to permission to operate

About six months

Utility / AHJ

LADWP / LADBS

The story

The message did not come from the utility. It came from the owner, on a Saturday: the crew had been out, the new meter was in, and they had been told to let the installer know the system could be connected.

That is worth noting on its own, because people assume the installer hears first. The utility notifies the account holder. On a project where the owner is not reading their email closely, permission to operate can sit unnoticed for days while everyone waits for a message that has already been delivered to somebody else.

The other half of the reply was the interesting part. The system was authorized. Five of its modules were not yet on the roof.

This surprises people and it should not. Permission to operate is granted against the design the utility approved — the system size, the equipment, the single-line diagram — not against a headcount taken on the roof that morning. The building department released the installation, the utility completed its review, the meter went on. What was outstanding was the last part of an array everybody had already agreed to.

So the remaining five went up the following Tuesday, onto mounts and rails that were already there, into microinverter positions the approved drawings already showed. Nothing about the system changed. It simply finished.

The line that matters, and it is a hard line: what goes on afterwards has to be what was approved. Adding modules beyond the approved design after the meter is set is a different act entirely — it is a new system size, and it needs its own application, its own review and its own permission. Finishing an approved array is housekeeping. Exceeding one is unpermitted work with a meter already on it.

If your system is energized and you can see that part of it is missing, the question to ask is whether what is still to come appears on the approved drawings. If it does, you are waiting on a crew. If it does not, you are waiting on a new application nobody has filed.

The calendar behind all this was long and unremarkable. The quote went out in February. The utility charge cleared at the beginning of May and the review notices — application received, details confirmed, site evaluation complete — all landed on the sixth. Then the summer, and on the twenty-second of August the building department release reached the utility and the installation was approved the same day. The meter was set on the twenty-sixth.

Handover happened the Monday in between: how the monitoring app works, how to see that the system is actually connected rather than merely switched on. The unconditional waiver followed at the end of September, once the account was settled.

Cali Energy designed, permitted, installed and finished this 9.9 kW array in Brentwood, Los Angeles.

How it ran

Six months from quote to permission to operate, and three days from permission to operate to a finished array.

What we did

• Acted on a permission to operate that reached the owner rather than the office.
• Finished the approved array three days after the meter was set.
• Kept the added modules inside the approved design rather than beyond it.
• Walked the owner through the monitoring at handover.
• Issued the unconditional waiver on settlement.

System specifications

Is your project like this one?

• Your system has been switched on and part of the array is missing.
• Somebody has offered to add panels to a system that already has a meter.
• You are not sure whether permission to operate has arrived.
• You have an app and no idea how to tell whether you are connected.

Cali Energy in Brentwood

Frequently asked questions

Can a solar system be switched on before it is finished?

Yes, if what remains is part of the design the utility already approved. Permission to operate is granted against the approved system size, equipment and single-line diagram, not against the number of modules on the roof that morning. Fitting the rest afterwards, onto mounts the drawings already show, changes nothing about the approval.

Can I add extra panels after the meter is installed?

Not without a new application. Finishing an approved array is housekeeping; going beyond it is a different system size and needs its own review and its own permission to operate. The distinction is whether the additional modules appear on the approved drawings — if they do not, the work is unpermitted with a meter already on it.

Who is told first when permission to operate is granted?

The account holder. People assume the installer hears first, but the utility notifies the customer, and on this Brentwood project the owner passed the message on. Where an owner is not watching their email, an authorization can sit unnoticed for days while everyone waits on news that has already been delivered.

How do I know my solar is actually connected and not just switched on?

Through the monitoring, which should show production reaching the house rather than an inverter merely powered up. That is worth walking through at handover rather than reading about later — on this project it was covered the Monday before the array was finished.

Does Cali Energy install larger systems in Brentwood, Los Angeles?

Yes. This Brentwood project was 9.9 kW AC-CEC with a microinverter behind each module, permitted through LADBS and interconnected through LADWP. Westside houses carry larger arrays, and the last few modules of a design are often the ones waiting on something.

What this would look like on your roof

Related

• The correction was a water bond sixty feet away Brentwood, Los Angeles · 12.87 kW · the final that failed off the roof Solar
• The new modules could not join the old ones Encino, CA · 5.34 kW added · a second system, the same meter, reverse tilt Solar
• One property, two arrays, and two different numbers on the paperwork North Hollywood, CA · 5.14 kW DC added · tie-in to existing solar Solar
• A second array on the leftover roof West Adams, Los Angeles · east, west and north · adding to an existing system Solar

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