BPi
13 installs · $4.28/W avg
Green Stock Solar
42installations on record
$3.97median price per watt
Financing Available
Installation Statistics
42
Quotes in Database
8.5 kW
Avg System Size
$33,849
Avg Total Price
Solar Price per Watt
$3.87/W
Average
$3.97/W
Median
$3.64 – $4.17
Typical Range (P25–P75)
Top ZIP Codes
Recent Installations
LocationSystemPrice$/W · $/kWhDate
Napa County, CA17.6 kW30 kWh$80,640$2.30/W$1344/kWhMay 29, 2026Napa, CA 9455815.4 kW$49,195$3.20/WMay 12, 2026Napa, CA 9455823.7 kW$92,631$3.91/WApr 14, 2026Napa, CA 9455812.3 kW$39,827$3.24/WApr 13, 2026Napa, CA 945594.8 kW$20,696$4.29/WApr 8, 2026Saint Helena, CA 945745.2 kW$20,681$4.01/WApr 1, 2026Napa, CA 945585.7 kW$23,546$4.13/WMar 30, 2026Napa, CA 945597.9 kW$29,049$3.68/WMar 30, 2026Napa, CA 945588.3 kW$31,697$3.80/WMar 27, 2026Napa, CA 945587.9 kW$29,685$3.76/WMar 26, 2026Napa, CA 9455813 kW$50,005$3.85/WMar 26, 2026Saint Helena, CA 945745.3 kW$23,250$4.38/WMar 13, 2026Pleasant Hill, CA 945236.1 kW10 kWh$42,915$3.74/W$2008/kWhFeb 24, 2026Oakland, CA 946122.7 kW$12,182$4.49/WFeb 23, 2026Napa, CA 945585.4 kW$21,542$3.97/WFeb 22, 2026Napa, CA 945584.8 kW$19,329$4.00/WFeb 21, 2026Napa, CA 945586.1 kW$24,385$3.97/WJan 26, 2026Sebastopol, CA 954728.8 kW$36,000$4.09/WJan 15, 2026Napa, CA 945583.5 kW$14,205$4.04/WJan 8, 2026Napa, CA 9455910.8 kW$35,442$3.27/WDec 30, 2025Page 1 of 3