401 Miller Avenue
Mill Valley, CA
401 Miller Ave (Edgars Plaza) is a multi-tenant commercial complex estimated at 10,000–20,000 sq ft in downtown Mill Valley. Tenants include restaurant and retail/service uses, typical of a mixed-use neighborhood retail center with standard daytime commercial energy loads.
Projected savings.
Year 1
$21,600
Lifetime (~30 yr)
$1,613,000
By the numbers.
8.3
Years to payback
$3.8M
Total benefits (lifetime)
$2.2M
Property value gain
$245,175
Tax incentives captured
Levelized cost of electricity
Like most Mill Valley 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 $1.14/kWh from PG&E, reduced to $0.07/kWh from SolarPorts.
SolarPorts evaluated their interval power usage (every 15 minutes) and proposed a right-sized 25.0 kW solar system for on-site generation delivered as a rooftop array on the building.
The system now produces roughly 47,040 AC kWh of clean energy each year, an estimated $21,600 in year-one utility offsets, and around $1,613,000 in net lifetime savings — turning a recurring operating-cost into a long-term, predictable energy hedge.
System spec
System design
- Site
- 401 Miller Avenue
Mill Valley, CA 94941 - Utility
- PG&E
- Seismic rating
- 1.2
- Irradiance
- 2
- System size
- 25.0 kW DC
- Estimated production
- 47,040 AC kWh / year
- Year-1 utility offset
- $21,600
- Lifetime savings (~30 yr)
- $1,613,000
- Solar panels
- 50 × TSM-DEG18MC.20(II)
- Wire loss
- 2.0%
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