Why neighborhood matters more than people think
Solar pricing in Hawaii isn't uniform. A homeowner in Ewa Beach might pay $2.60/watt for the same system that runs $3.20/watt in Hawaii Kai — from the same installer. The gap comes from roof complexity, drive time, permitting patterns, and local installer competition. Neighborhoods with high install density have more competition, faster permitting, and lower per-job overhead.
We analyzed 73,425 solar permit records from Honolulu's building department — every residential PV installation since 2007. Here's what the data shows about where Oahu homeowners are getting the best deals, and where they're paying a premium.
Methodology note: $/watt figures are estimated using a typical system size of 7.5 kW — consistent with the median residential installation in Honolulu. Actual $/watt depends on system size: smaller systems typically cost more per watt. Use the Quote Comparison tool to benchmark your specific quote.
Median $/watt by neighborhood
The chart below ranks Oahu's top 20 neighborhoods (by all-time permit volume) by their median estimated $/watt — from most expensive at the top to cheapest at the bottom.
Based on median permit value ÷ 7,500W assumed system size. Top 20 neighborhoods by all-time permit volume shown.
Permit volume by neighborhood
Volume is a proxy for market maturity. High-volume neighborhoods have more installer competition, more homeowners to ask for referrals, and more permit processing experience at the local office. Ewa Beach and Kapolei have added thousands of homes in the last decade — new construction with solar-ready roofs has driven disproportionate volume growth on the leeward side.
Cheapest vs. most expensive neighborhoods
The spread between Oahu's cheapest and most expensive neighborhoods is significant. Here's the breakdown:
🟢 Most Affordable (Median $/W)
🔴 Most Expensive (Median $/W)
What drives the spread? The most expensive neighborhoods tend to be older, hilly, or have more complex roof geometries (Hawaii Kai, Nuuanu, Pali). The cheapest tend to be newer flat-lot developments with standardized roof lines (Ewa Beach, Kapolei, Waipio). Installer availability also matters — areas with fewer active competitors see less price pressure.
Full neighborhood ranking
All 26 neighborhoods with ≥100 all-time permits, ranked by permit volume. Top installer shown for each neighborhood.
| # | Neighborhood | All-Time Permits | Last 12 Mo. | Median $/W* | Top Installer |
|---|---|---|---|---|---|
| 1 | Ewa Beach | 7,176 | 80 | $3.33 | Hawaii Energy Connection, LLC |
| 2 | Hawaii Kai | 7,001 | 88 | $3.47 | Revolusun LLC * |
| 3 | Mililani | 6,361 | 66 | $3.20 | Alternate Energy, Inc. |
| 4 | Kailua | 5,506 | 57 | $3.65 | Revolusun LLC * |
| 5 | Waipahu | 5,411 | 86 | $3.36 | SUNRUN INSTALLATION SVS INC |
| 6 | Kaimuki / Kapahulu | 4,752 | 44 | $3.20 | Alternate Energy, Inc. |
| 7 | Kaneohe | 4,581 | 81 | $3.73 | Alternate Energy, Inc. |
| 8 | Kapolei | 4,255 | 40 | $3.20 | Hawaii Energy Connection, LLC |
| 9 | Aiea | 3,572 | 37 | $3.20 | Alternate Energy, Inc. |
| 10 | Pearl City | 3,364 | 46 | $3.13 | Alternate Energy, Inc. |
| 11 | Waianae | 3,028 | 29 | $3.47 | VIVINT SOLAR INC |
| 12 | Kalihi / Palama | 2,360 | 47 | $3.47 | Alternate Energy, Inc. |
| 13 | Manoa / Makiki | 2,187 | 24 | $3.33 | Alternate Energy, Inc. |
| 14 | Moanalua / Fort Shafter | 1,883 | 29 | $3.73 | SUNRUN INSTALLATION SVS INC |
| 15 | Salt Lake / Aliamanu | 1,461 | 23 | $3.43 | Alternate Energy, Inc. |
| 16 | Wahiawa | 1,303 | 31 | $3.37 | SUNRUN INSTALLATION SVS INC |
| 17 | Downtown Honolulu | 866 | 9 | $3.25 | Alternate Energy, Inc. |
| 18 | Waimanalo | 742 | 7 | $3.93 | VIVINT SOLAR INC |
| 19 | Haleiwa | 612 | 7 | $3.40 | Hawaii Energy Connection, LLC |
| 20 | Waikiki | 606 | 7 | $3.16 | Revolusun LLC * |
*Estimated $/watt = median permit value ÷ 7,500W typical system size. Actual $/watt varies with system size.
Installer market share across Oahu
Ten installers account for the majority of all residential solar permits on Oahu. Hawaii Energy Connection and Alternate Energy have consistently led in volume — but market share has shifted meaningfully over the last five years as Sunrun, SunPower, and newer entrants gained ground.
| Installer | Total Permits (Oahu) | Market Share |
|---|---|---|
| Alternate Energy, Inc. | 7,525 |
17.2%
|
| Hawaii Energy Connection, LLC | 7,168 |
16.4%
|
| Revolusun LLC * | 6,246 |
14.3%
|
| SUNRUN INSTALLATION SVS INC | 4,704 |
10.8%
|
| American Piping & Boiler Co., Shane Lau, PE | 3,776 |
8.6%
|
| VIVINT SOLAR INC | 3,631 |
8.3%
|
| SolarCity Corporation | 2,895 |
6.6%
|
| SolarCity Corporation dba TESLA ENERGY | 2,894 |
6.6%
|
| AMERICAN ELECTRIC CO LLC | 2,456 |
5.6%
|
| Elemental Energy LLC dba Sunetric | 2,368 |
5.4%
|
What this means when you get a quote
The neighborhood data gives you a benchmark — but your specific quote depends on your roof, system size, and which installer you're talking to. A few things to know when using these numbers:
Same installer, different neighborhood pricing. Installers don't always charge the same $/watt in every neighborhood. Drive time, permit processing speed, and local subcontractor availability all affect job cost. The neighborhood medians above reflect what the market has actually paid — not what any single installer charges.
The cheapest neighborhood isn't your target — your neighborhood median is. If you're in Kaimuki, comparing to Ewa Beach prices isn't useful. Compare to the Kaimuki median. If your quote is 20%+ above the local median, ask for an explanation or get a second bid.
Volume neighborhoods are competitive. If you're in Ewa Beach, Kapolei, or Pearl City — you're in one of the most active solar markets in Hawaii. Use that leverage. More installers fighting for work means more room to negotiate.
Oahu-wide median: Across all residential permits in our dataset, the median installation value translates to roughly $2.90–$3.10/watt depending on the year and system size mix. If your quote is above $3.50/watt for a standard 7–9 kW system, you should get at least one competing bid.
Don't forget the tax credit math. The $/watt you see here is the gross install cost before Hawaii's RETITC. A 6 kW system qualifies for $7,000+ in state credits — but only if your installer calculates it per 5 kW block, not as a flat $5,000 cap. Understand the RETITC per-block strategy →
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