Related Clues:

• Of interest to some physicists
• Kind of panel or power
• Kind of clock or bomb
• Quite tiny
• Renewable energy
• Kind of energy or eclipse
• Word with "system" or "battery"
• Type of flare or panel
• Eclipse type
• Powered by light
• Green option
• Word with "energy" or "submarine"
• To do with the sun
• This energy is nuclear
• Referring to the smallest component