It took them 3 days to install – got to say the company Engensa were very clean, tidy and efficient.
Although the web based interface has not been sorted out yet (which will really show the effectiveness of the panels) the basic information is easy to access. When the sun was out the electric metre dial stopped turning! We seem to use about 1KW of power all the time due to all the devices in the house, and the system will (at its peak) deliver 4kw of power, more than enough, but only after I get to see some proper information will I be able to see exactly what the savings will be.
A full update will be posted soon