The average solar panel system in San Jose costs $17,184 to $23,249 before the 30% federal tax credit. After the credit, your net cost drops to $12,028 to $16,273.
6A (each string) = 6 strings – So the maximum parallel strings is 6 Formula: MPPT Current (Target Current) / Individual Panel Current (I mp) = Parallel Strings Step-5. Calculate total number of panels: – 3 panels in series – 6 strings in parallel – So total.
For a 12V 100Ah lithium battery, around 400W of solar panels is ideal. Lithium batteries are more efficient and give full usable capacity, while lead-acid batteries need nearly double the size to.
About 97% of solar panels quoted on the EnergySage Marketplace in the second half of 2025 are 400 to 460 watts—expect to see panel outputs in this range in your quotes. Your panels' actual output will depend on your roof's shading, orientation, and hours of sun exposure.
Sun Light & Power designed and installed solar systems for both the HUB and Housing buildings at Parkmoor Community Apartments & The HUB Center in San Jose, California.