Likely no replies to the posting due to a lack of specifics.
Determine what the battery needs to do, i.e. 10 amps all night (14 hours?), 12V?, space available, how long you would like it to last, etc.
Many manufacturers make multiple lines, each specialized. Few if any specialize in boating, but ask your marine realer once you know the needs.
Hence the need for a battery maybe?I don't think solar will work at night?