Autumn '21

2Choosing an integrated PV
system: with or without a tray?
Most integrated PV systems
require a separate carrier system for
the panel to sit into. These tend to be
in the form of separate polypropylene
trays. The main disadvantage of this
system is that it requires additional
timbers to fix to, as well as counter
battens. Fire retardant trays are
available but often come at a higher
cost.
The other option is a solar PV with
integrated tray system, such as Marley
SolarTile. These systems sit directly
onto the battens and, in some cases, are
fixed to the rafters and the battens. This
means wind resistance is significantly
higher due to the direct fixings. As the
aluminium tray is integrated into the
panel, fire ratings are also often higher
than the plastic tray systems. Although
initial purchase price can be higher,
when the prices are inclusive of extra
timber and labour, alongside the extra
cost for the fire-retardant tray, the
integrated system can be more cost
effective.
3Monocrystalline v
polycrystalline
Both monocrystalline and
polycrystalline solar panels serve the
same function in the overall solar PV
system: they capture energy from the
sun and turn it into electricity. They
are also both made from silicon, which
is used for solar panels because it is
an abundant, very durable element.
Many solar panel manufacturers
produce both monocrystalline and
polycrystalline panels. Monocrystalline
solar panels are generally thought of
as a premium solar product. The main
advantages of monocrystalline panels
are higher efficiencies and sleeker
aesthetics.
4Property and roof suitability
Property and roof suitability is
a crucial aspect which needs
to be considered before specifying
and installing solar panels. A lot of
these considerations will be addressed
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