S-Power designed the high-performance NARVA vacuum tube. It is the only German-made high efficiency vacuum tube with a glass-to-metal junction and a nanoparticle coating. Specially developed for the s-power sensorThe manufacturer of high quality vacuum tube collectors.

We offer :

> Direct delivery of vacuum tubes from NARVA, manufactured exclusively in Germany
> A guarantee on these vacuum tubes
> NARVA has its own glassware.
> NARVA has 40 years of experience in the field of vacuum
> NARVA has 40 years of experience in the field of glass-to-metal joining
> More than 15 years of experience in the development and production of vacuum tube collectors
> More than 20 years of experience in the integration of vacuum tube collectors in domestic and industrial technology
> 20 years of experience in vacuum tube coating technology
> 10 years of experience in the development of vacuum tube collectors that transform direct sunlight and diffuse rays into thermal energy in an optimal way.