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3883 AIRWAY DR
SANTA ROSA, CA

3883 Airway Dr (Sutter Northbay Health Plaza) is a ~100,000 sq ft Class A, three-story multi-tenant medical office building built in 1983. It houses Sutter Health outpatient services including urgent care, diagnostic imaging, lab, and specialty physician offices, with high continuous HVAC and medical equipment loads.

System layout — solar carports and rooftop arrays at SANTA ROSA
System layout — solar carports and rooftop arrays

Projected savings.

Year 1

$232,300

Lifetime (~30 yr)

$34,741,000

By the numbers.

0.8

Years to payback

$101.7M

Total benefits (lifetime)

$67.0M

Property value gain

$605,693

Tax incentives captured

Levelized cost of electricity

$0.01 / kWh · SolarPorts
vs.
$2.41 / kWh · PG&E

Like most SANTA ROSA businesses, the site was paying high Peak rates and large Demand charges — the kind of bill structure that punishes daytime energy use and penalizes the very hours commercial properties consume the most power. The result was a Levelized Cost Of Energy (LCOE) of $2.41/kWh from PG&E, reduced to $0.01/kWh from SolarPorts.

SolarPorts evaluated their interval power usage (every 15 minutes) and proposed a right-sized 256 kW solar system for on-site generation delivered as 2 SolarPort carport structures above the parking lot and a rooftop array on the building.

The system now produces roughly 479,549 AC kWh of clean energy each year, an estimated $232,300 in year-one utility offsets, and around $34,741,000 in net lifetime savings — turning a recurring operating-cost into a long-term, predictable energy hedge.

System spec

System design

Site
3883 AIRWAY DR
SANTA ROSA, CA 95403-1670
APN
058011017000
Utility
PG&E
Seismic rating
1.7
Irradiance
2
System size
256.3 kW DC
Estimated production
479,549 AC kWh / year
Year-1 utility offset
$232,300
Lifetime savings (~30 yr)
$34,741,000
Solar panels
410 × Q.TRON XL-G2.3/BFG
(120 carport · 290 rooftop)
SolarPort structures
2
Wire loss
2.0%

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