Solar PV Tiles – Installation Instructions
18 July 2012
Page 11 of 13
4 CONNECTIONS TO INVERTER
For safety reasons it is very important that the electrical connections
from the inverter to the PV tile array are made as per the following
instructions.
Normally the inverter is located within the roof sub-structure (e.g. loft
space) in the immediate proximity of the PV tile array so as to keep
the length of cable on the DC side of the system to a minimum. The
cabling from the inverter to the PV tile array inside the roof structure
must be properly secured throughout its length using clips or cable
ties as appropriate. The inverter should always be mounted vertically
on the wall on a non-combustible base or board fixed to the roof
structure and in a location that is easily accessible for servicing and
testing.
A DC switch should always be installed between the PV tile array and
the inverter. Many inverters contain an integrated DC switch but it is
possible that your inverter may not have an integrated switch. Check
the technical specifications of the inverter and local regulations
before installation.
As per the circuit diagram at either end of each string of PV tiles
(connected in series) the + and – pre-wired connections must be
connected to the correct inputs of the DC to AC inverter. These
electrical connections are made as follows:
i.
The 10 m cables supplied are used to make the
electrical connections from the first and last PV tiles in
each string back to the inverter. It is recommended
that these cables are routed between the underlay
and tiling battens and fed through a horizontal lap in
the underlay near the apex of the roof into the roof
space below (and ultimately to where inverter is
located).
ii.
Before the cables from the inverter are connected to
the pre-wired connectors of the PV tile array it is
essential that they are first properly secured by
wrapping around a batten-rafter junction as shown
above. This relieves any strain on the connectors and
prevents the inverter cables detaching from the PV
tile connectors.
