sun-powered clock

noun
UK /ˈsʌn ˌpaʊəd klɒk/
US /ˈsʌn ˌpaʊərd klɑːk/

A sun-powered clock is a clock that gets its energy from the sun.

The sun-powered clock on the wall keeps perfect time without any batteries.

SYNONYMS

solar clocksolar-powered clockphotovoltaic clocksun clock

RELATED WORDS

solar panelbatterysunlighttimepiecerenewable energy

OTHER MEANINGS

2. A clock that uses a solar cell to charge an internal battery.

This sun-powered clock stores extra energy for cloudy days.

3. A sundial-like device that shows time using sunlight and shadows.

The garden's sun-powered clock casts a shadow to mark the hours.

4. A clock whose display is powered by ambient light rather than mains electricity.

The sun-powered clock in the window runs on light alone.