West Coast Solar
565 installs · $3.39/W avg
Del Sol Energy
79installations on record
$2.88median price per watt
Residential SolarCommercial SolarFinancing Available
Installation Statistics
79
Quotes in Database
9.3 kW
Avg System Size
$45,819
Avg Total Price
Solar Price per Watt
$2.98/W
Average
$2.88/W
Median
$2.67 – $3.25
Typical Range (P25–P75)
Battery Price per kWh
$1347/kWh
Average
$1325/kWh
Median
$1165 – $1537
Typical Range (P25–P75)
Top ZIP Codes
Recent Installations
LocationSystemPrice$/W · $/kWhDate
Castro Valley, CA 945464.8 kW$17,388$3.60/WMay 21, 2026Sonoma County, CA—20.16 kWh$39,587$1964/kWhMay 19, 2026Contra Costa County, CA8.1 kW20.16 kWh$45,619$2.43/W$1291/kWhMay 6, 2026Brentwood, CA 945137 kW$25,619$3.66/WApr 24, 2026Browns Valley, CA 959188.2 kW$31,064$3.80/WApr 16, 2026Brentwood, CA 945132.6 kW10 kWh$16,342$2.70/W$934/kWhApr 14, 2026Bethel Island, CA 945114.8 kW15 kWh$34,697$3.13/W$1303/kWhApr 6, 2026Brentwood, CA 9451311.4 kW$36,450$3.19/WMar 20, 2026Brentwood, CA 945136.7 kW10 kWh$47,615$3.92/W$2143/kWhFeb 24, 2026Brentwood, CA 945136.3 kW10 kWh$33,895$2.91/W$1566/kWhFeb 22, 2026Brentwood, CA 945137.5 kW20.16 kWh$55,405$3.07/W$1603/kWhFeb 21, 2026Brentwood, CA 9451316.5 kW20 kWh$93,740$3.49/W$1810/kWhJan 23, 2026Brentwood, CA 945137.9 kW20 kWh$51,325$2.77/W$1466/kWhJan 22, 2026Fremont, CA 945397.1 kW10.08 kWh$35,235$2.77/W$1543/kWhJan 21, 2026Brentwood, CA 945137.5 kW13.5 kWh$38,695$3.03/W$1191/kWhJan 15, 2026Brentwood, CA 945138.4 kW10 kWh$34,890$2.60/W$1315/kWhJan 13, 2026Oakley, CA 945615.9 kW13.5 kWh$33,323$3.01/W$1164/kWhJan 12, 2026Larkspur, CA 949397.8 kW20 kWh$48,967$2.58/W$1447/kWhJan 9, 2026Discovery Bay, CA 945054.8 kW10 kWh$31,474$3.24/W$1609/kWhJan 5, 2026Tiburon, CA 949208.2 kW20 kWh$56,124$2.97/W$1583/kWhDec 29, 2025Page 1 of 4