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1655 Old County Road
San Carlos, CA

1655 Old County Road is the facility of Arata Equipment Company, a commercial and industrial solid waste collection equipment dealer and distributor founded in 1953, serving California and Nevada. The site includes a warehouse for parts storage supporting the refuse and recycling equipment sector, with daytime weekday operations.

System layout — rooftop arrays at San Carlos
System layout — rooftop arrays

Projected savings.

Year 1

$1,300

Lifetime (~30 yr)

$95,000

By the numbers.

1.5

Years to payback

$0.2M

Total benefits (lifetime)

$0.1M

Property value gain

$4,112

Tax incentives captured

Levelized cost of electricity

$0.02 / kWh · SolarPorts
vs.
$0.84 / kWh · PG&E

Like most San Carlos 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 $0.84/kWh from PG&E, reduced to $0.02/kWh from SolarPorts.

SolarPorts evaluated their interval power usage (every 15 minutes) and proposed a right-sized 2.0 kW solar system for on-site generation delivered as a rooftop array on the building.

The system now produces roughly 3,764 AC kWh of clean energy each year, an estimated $1,300 in year-one utility offsets, and around $95,000 in net lifetime savings — turning a recurring operating-cost into a long-term, predictable energy hedge.

System spec

System design

Site
1655 Old County Road
San Carlos, CA 94070
APN
046223100
Utility
PG&E
Seismic rating
1.2
Irradiance
2
System size
2.0 kW DC
Estimated production
3,764 AC kWh / year
Year-1 utility offset
$1,300
Lifetime savings (~30 yr)
$95,000
Solar panels
4 × TSM-DEG18MC.20(II)
Wire loss
2.0%

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