Free (as in "free beer") power from the sun and free (as in "free speach") software for our servers.
Now our servers are powered from a photovoltaic panel and from the standard 220V power supply. When the sun is
sufficient to drive the electonics, no power is taken from the network. When the light starts to fall, both the
solar panel and the standard power supply are used. In the night today all the power comes from the 220V line,
but tomorrow we´ll use some lead or lithium batteries, charged during the day.