The efficiency of solar vacuum tubes can vary, but on average, they have an efficiency ranging from 50% to 80%.
The efficiency of solar vacuum tubes can vary, but on average, they have a conversion efficiency of around 50-60%. This means that they are able to convert around half of the solar energy they receive into usable heat or electricity.
The efficiency of solar vacuum tubes can vary depending on various factors such as the design, quality, and installation. However, on average, solar vacuum tubes have an efficiency range of 60% to 80%, which means they can convert 60% to 80% of the sunlight they receive into usable heat energy.