10 units of Vacuum Tubes for solar water heater, evacuated tubes for solar plastic shield for sensors Accuracy: +/- 15%

Accuracy: +/- 15%

* Material of screen: HTN

In an East West orientation they cantrack the sun all year round

The use of Lithium battery is strongly suggested

This auction includes: 1 set of solar collector of solar hot water heater(tube length: 0

10 units of Vacuum Tubes for solar water heater, evacuated tubes for solar plastic shield for sensors Accuracy: +/- 15%This listing includes: 10 units of vacuum tubes (or evacuated tube) for solar,high performance. Length of tube: 500mm Application: they can used for the demo solar collector, demo solar water heater, or other DIY solar hot water heating system. Get the energy from the SUN. Remark: the tubes are fragile, we will ship to you via Express. (if tubes broken, we will ship to you again or refund to you, no worries) Description: Just like an automobile