IPA: /nɒnˈsoʊlər/
KK: /nɑnˈsoʊlər/
Not related to or derived from the sun.
The nonsolar energy sources include wind and hydroelectric power.
Nonsolar is formed from "non-" (meaning not) and "solar" (from Latin "solaris", meaning of the sun). The word "nonsolar" refers to something that is not related to or does not involve the sun.
Think of 'non-' meaning not, and 'solar' relating to the sun — so nonsolar means something that is not connected to the sun.