North Hills, Los Angeles, CA · May – June 2021 · LADWP / LADBS
One delivery, one working day on a North Hills roof
The modules were delivered to the site and the rest of the materials collected from the supply house on the way. Attachments, flashings and rails went down first, the array was complete by mid-afternoon, and the final inspection was booked for seven days later. It passed.
This North Hills array went up in a single day: modules delivered to the site in the morning, rails and flashings set before lunch, and the full array complete by mid-afternoon on one long plane above the pool with a second group on the plane behind. The final inspection was scheduled for the following Friday and passed at the first visit. Cali Energy was the installing contractor on the roof.
At a glance
- Array
- Two groups across a composition shingle roof
- Inverters
- Enphase microinverters, one per module
- Installed
- One working day in late May 2021
- Materials
- Modules to site, balance collected from the supply house
- Final inspection
- Seven days later
- Result
- Passed first time
- Roof
- Composition shingle, gabled
- Utility / AHJ
- LADWP / LADBS
The story
The plan for the day was set three days ahead: installation confirmed for the Friday, modules delivered directly to the site, and everything else picked up from the supply house on the way. That is the whole of the logistics, and getting it right is most of what makes a one-day installation possible.
The roof is a straightforward gable in composition shingle, with a long plane above the pool and a shorter one behind the ridge. Attachments went in along the rafter lines, each one flashed, and the rails went on top of them. Once they were down the layout was fixed, and it was clear the array would land where the drawing said it would.
That flashing detail is the part of a solar installation that has to outlast everything else on the roof. The bracket is bolted into the rafter, and the flashing is slid up under the shingle course above so that water running down the roof passes over it rather than reaching the hole. Done properly it is invisible within a week and irrelevant for the life of the roof. Done badly it is a leak in the first winter.
The modules went up through the early afternoon, each with a microinverter underneath it, and the run was closed off at the end with the conduit to the wall. By mid-afternoon the second group on the far plane was on, and the array was complete.
What makes a day like this possible is decided before anyone gets on the roof. The layout has to match the building rather than an aerial estimate, the attachment positions have to land on rafters that are where the drawing says they are, and every part has to be on site by the time the first bracket goes in. When one of those is wrong the day stretches: a missing flashing kit or a rafter that is not where it should be costs an afternoon, and the crew comes back. None of those went wrong here.
The final inspection was set for the following Friday. It passed at the first visit, and nothing else about this project needed attention afterwards.
A prepared site, a delivery that arrives where it is supposed to, and a clean set of drawings produce a day like this one more often than not.
How it ran
| Tuesday 25 May 2021 | Installation confirmed for the Friday; delivery and pick-up arranged |
|---|---|
| Friday 28 May | Modules delivered; balance of materials collected |
| Friday 28 May | Attachments, flashings and rails set on the long plane |
| Friday 28 May | Modules and microinverters installed; second group completed |
| Friday 4 June | Final inspection |
| Friday 4 June | Passed at the first visit |
Ten days from the confirmation email to a passed final inspection, with one working day on the roof.
What we did
- Set the delivery and collection so that everything needed was on site that morning.
- Fixed the attachments into the rafters and flashed each one under the shingle course above.
- Installed the rails, modules and a microinverter under each module across two planes.
- Ran the conduit from the array to the wall and closed the system off.
- Presented the installation for final inspection, which passed at the first visit.
System specifications
| Array | Two groups over two planes |
|---|---|
| Inverters | Microinverters, one per module |
| Mounting | Rafter-fixed attachments with flashings under the course above |
| Roof | Composition shingle, gabled |
| Installation | One working day |
| Inspection | Passed at the first visit |
| Utility / AHJ | LADWP / LADBS |
Is your project like this one?
- You want to know what a solar installation looks like when nothing goes wrong.
- You are being told your roof will take several days and want a second view.
- You care about how the array is attached and flashed, not just how it looks.
- Your project came through a dealer and you want to know who was on the roof.
- You are comparing installers and want to see an ordinary job, not a rescue.
Cali Energy in North Hills
North Hills sits inside City of Los Angeles boundaries: permits run through LADBS, interconnection through LADWP.
Most solar installations run the same way. The modules arrive, the roof is prepared, the array goes up, the inspector comes and the file closes. What decides whether that takes one day or three is almost never the roof: it is whether the materials are on site, whether the drawings match the building, and whether the crew has everything it needs before it climbs the ladder.
- License and classifications: CSLB #1032379
- Official reference for this process: LADBS — inspections
- Official reference for this process: CSLB — check a contractor's license
Frequently asked questions
Can a residential solar array really go up in one day?
On a simple roof with a prepared site, yes. This one was a composition shingle gable with a long clear plane, the modules were delivered to the site that morning, and the rest of the materials were collected on the way. Attachments, flashings and rails went on before lunch and the modules followed in the afternoon. Complex roofs, tile, multiple planes or service work push it to two days or more.
What is under a mount on a shingle roof?
A bracket bolted into the rafter and a metal flashing slid up under the shingle course above it, so water running down the roof passes over the flashing rather than reaching the fixing. That detail is what keeps the roof dry for the rest of its life, and it is the part of the installation nobody sees once the modules are on. Cali Energy flashes every penetration this way as standard.
How long after installation is the inspection?
It depends on the queue, and a week is a normal wait. This array was installed on a Friday and inspected the following Friday, passing at the first visit. The inspection cannot be requested until the work is finished, so the useful question to ask an installer is not how fast they can book it but how ready the job will be when the inspector arrives.
Who do I call if something on the roof needs attention later?
The contractor who did the installation, because that is who holds the workmanship obligation and the license the work was performed under. Cali Energy was the contractor on this roof. Where a system was sold by one company and installed by another, the sales company handles the contract and the installer handles the roof, so it is worth knowing which is which before you need to call.
Does Cali Energy install solar in North Hills?
Yes. North Hills is part of the City of Los Angeles, so permits run through LADBS and interconnection through LADWP. Cali Energy covers design, permitting, installation, inspection and commissioning here, on straightforward single-day roofs like this one and on projects that need service or panel work first. Our license is CSLB #1032379, and our work in this neighborhood sits alongside the rest of the valley.
What this would look like on your roof
Every number above came off a real job in North Hills, Los Angeles, CA — not a brochure. Tell us your utility, your roof and what your bill looks like now, and we will model your own version of it before you commit to anything.
Or call +1 (323) 844-7777 · Cali Energy, Northridge · CSLB #1032379 (B, C-10, C-39) — design, permits, install and electrical under one licensed contractor.
Related
This timeline reflects this property and this permitting path. Updated September 2026.