Long Beach, CA · February 2023 · Southern California Edison / City of Long Beach
A 2.4 kW array in Long Beach, and the full process anyway
One of the smallest systems we install: a short run of Canadian Solar modules on a shallow shingle roof. Everything underneath it — permit, ground, disconnect, inspection — is identical to a system five times the size.
This Long Beach installation is 2.4 kW, one of the smallest we install: a single short run of Canadian Solar modules on a shallow composition shingle roof with a SolarEdge inverter. Cali Energy took it through the same route as any other — city permit, grounding electrode driven and bonded, disconnect and labels on the wall, sealed penetrations and a final inspection — because none of those scale down with the array.
At a glance
- System size
- 2.4 kW
- Modules
- Canadian Solar
- Inverter
- SolarEdge HD-Wave
- Roof
- Composition shingle, shallow pitch
- Grounding
- Electrode driven and bonded
- Installed
- 1 February 2023
- Utility / AHJ
- Southern California Edison / City of Long Beach
The story
This is about as small as a grid-connected array gets. Two and a bit kilowatts: one short run of modules on a shallow shingle roof, a wall-mounted inverter, and a conduit that takes about a minute to follow from end to end.
What did not get smaller is everything underneath. The permit is the same application to the same city bureau. The grounding is checked and bonded the same way, because a fault on a small system needs somewhere to go just as much as a fault on a large one. The disconnect is the same device with the same labels. The final inspection is the same inspector measuring the same clearances with the same tape.
That is the real economics of a small array and it is rarely explained. The modules and the roof labor scale with the size; the paperwork, the electrical work at the wall and the inspection do not. So the cost per kilowatt of a very small system is the highest you will see, and it is not because anybody is overcharging — it is because half the job is a fixed quantity.
None of which is an argument against doing it. A small roof, a small bill or a shaded plane can make a small array exactly the right answer. It is an argument for knowing what you are buying: not a smaller project, a smaller array attached to the same project.
If you have been quoted for something in this range and the price per kilowatt looks high next to a neighbor's twenty-panel system, that is the reason. Ask what the fixed half of the job is and you will see it.
How it ran
| January 2023 | Permit approved and the install scheduled |
|---|---|
| 1 February 2023 | Array installed on the shallow roof |
| Same visit | Grounding electrode driven and bonded |
| Same visit | Inverter, disconnect and labels fitted on the wall |
| Same visit | Every penetration bedded and flashed |
| February 2023 | Final inspection passed |
Six modules of array and a full project underneath them.
What we did
- Installed the 2.4 kW array as a single run on the shallow shingle roof.
- Bedded and flashed every roof penetration the same way as on a full-size array.
- Drove and bonded the grounding electrode.
- Fitted the SolarEdge inverter, the disconnect and the labels on the wall.
- Took the system through the city permit and final inspection.
System specifications
| System size | 2.4 kW |
|---|---|
| Modules | Canadian Solar, single run |
| Inverter | SolarEdge HD-Wave, wall mounted |
| Roof | Composition shingle, shallow pitch |
| Grounding | Electrode driven and bonded |
| Penetrations | Bedded in sealant before flashing |
| Utility / AHJ | Southern California Edison / City of Long Beach |
Is your project like this one?
- Your roof only has room for a handful of modules.
- Your bill is small and you have been told solar is not worth it.
- You were quoted a high price per kilowatt and want to know why.
- Most of your roof is shaded and only one plane works.
- You want to know what a small system does and does not save you.
Cali Energy in Long Beach
Long Beach is its own city, not a Los Angeles neighborhood: permits run through the City of Long Beach Building & Safety Bureau, interconnection through Southern California Edison.
A small system does not get a small process. The permit, the grounding electrode, the disconnect, the labels and the final inspection are the same whether the roof carries six modules or thirty — which is why a very small array is proportionally the most expensive kind to install.
This installation is on the Long Beach projects page alongside the others, and what the work covers is set out on the Long Beach service area page.
- License and classifications: CSLB #1032379
- Official reference for this process: California Energy Commission — solar equipment lists
- Official reference for this process: City of Long Beach — Building & Safety Bureau
Frequently asked questions
Is a 2.4 kW solar system worth installing?
It can be, when the roof, the shading or the bill do not justify more. What it will not do is cost proportionally less: the permit, the grounding, the disconnect and the inspection are the same as for a much larger array, so the price per kilowatt is the highest you will see. The array is smaller; the project is not.
Why does a small system cost so much per kilowatt?
Because roughly half the work does not scale. Modules, rails and roof labor go up and down with the size. The permit application, the grounding electrode, the wall equipment, the labeling and the final inspection are a fixed quantity whether the roof carries six modules or thirty, and they get spread over fewer kilowatts.
Does a small array still need a permit and an inspection?
Yes, and the same ones. There is no threshold below which a grid-connected system stops needing a city permit, a grounding electrode, a disconnect, labeling and a final inspection. The paperwork does not know how many modules are on the roof, and the inspector measures the same clearances either way.
Does Cali Energy install small systems in Long Beach?
Yes, and takes them through the identical process: permit from the city's Building & Safety Bureau, grounding, wall equipment, sealed penetrations and the final inspection. Cali Energy will also say plainly when a small array is not worth what it costs, which is a conversation better had before a contract. License CSLB #1032379.
What this would look like on your roof
Every number above came off a real job in Long Beach, 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.