Yes, solar vacuum tubes typically require a backup system for cloudy days as they rely on sunlight to generate heat. Cloudy weather can reduce the efficiency of solar vacuum tubes, hence a backup system like a traditional water heater or an electric heating element is often recommended to ensure a continuous supply of hot water.
Yes, solar vacuum tubes generally require a backup system for cloudy days as they rely on direct sunlight to generate heat. A backup system can ensure a continuous supply of hot water or heat during periods of low sunlight or overcast conditions.
Yes, solar vacuum tubes typically require a backup system for cloudy days to ensure continuous hot water supply or electricity generation.
