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50 E L EC TR I C AL CONNEC T I ON
W I N T E R 20 1 6
SHINE AMONG YOUR RIVALS
P
hotovoltaic systems on a
commercial scale present
substantial opportunities for
our industry.
However, sourcing and verifying a
range of site-specific data for a large
project is challenging.
In addition, ensuring that the data
meets all aspects of the system’s
performance and installation criteria
can be complicated – and unfamiliar to
some system designers and installers.
These are possible scenarios:
>
ensuring that correct cable distances
and gauges have been calculated;
>
determining which products support
zero PV export or additional grid
protection, and how they are
programmed;
>
avoiding unplanned additional work
on site; and
>
checking that the bill of materials is
comprehensive and whether there
are enough materials to complete the
installation.
Clients often request financial data
for the proposed installation, such as
the internal rate of return or levelised
cost of electricity. As system designers,
we must be able to justify these
calculations.
The prospect of engaging in
quotations for larger installations is
daunting. Do you have the skills to
meet the market?
A detailed site-specific system design
should provide the bill of materials,
system cost range and performance
data in a clear and logical fashion.
This information will ensure a smooth
installation process and conformity
with specifications.
WHY USE A SYSTEM DESIGN?
A system design from an engineering
consultant gives the installer all the
information for an efficient and
smooth installation.
Using a specialist offers many
benefits, including:
>
Increased margins via optimised
cable, module and racking locations,
resulting in faster installation and
reduced materials.
>
Access to projects beyond current
HOW DO YOU COMPETE IN THE
WIDER MARKETPLACE?
GSES
OUTLINES DESIGN TECHNIQUES
AND SUPPORTING PROCESSES
FOR MAXIMISING AN INSTALLER’S
ON-SITE EFFICIENCY, THE TIME
REQUIRED FOR COMPLETE
INSTALLATION, SYSTEM COSTS
AND CUSTOMER RETURN.
NOTES:
1. THISDRAWING ISTHECOPYRIGHTOFGLOBAL
SUSTRAINABLEENERGYSOLUTIONSPTY.LTD.ANDMUSTNOTBE
RETAINEDCOPIEDORUSEDWITHOUTTHEEXPRESSPERMISSION
OFGLOBALSUSTAINABLEENERGYSOLUTIONSPTY.LTD
2. DONOTSCALEFROMTHEDRAWING
3. ALLDIMENSIONSARE INMILLIMETRESANDLEVELS IN
MILLIMETRESUNLESSNOTEDOTHERWISE.ALLDIMENSIONSTO
BEVERIFIEDONSITE.
4. EXACTLOCATIONOFALLPARTSOFTHE INSTALLATIONTO
BEDETERMINEDBYCONTRACTORONSITE
5. CONTRACTORWORKSARERESTRICTEDTOTHEGRID
CONNECTEDPHOTOVOLTAICSYSTEMANDASSOCIATED
STRUCTURALANDELECTRICALCOMPONENTS
6. PHOTOVOLTAICARRAYMOUNTINGSYSTEMTOBE
INSTALLED INAACCORDANCEWITHAS1170.2ANDTHE
MANUFACTURERSPECIFICATIONS
Array3 (assumed)purlin
spacing1200mm
Array2purlin
spacing1200pm
FirstpurlinofArray1
andArray2203mm
back from ridge line
Array1purlin
spacing1200mm
Safety rail
Arraycenteredonmiddleof roof
Array3 (assumed)purlin
spacing1200mm
Safety rail
3D view of an object or structure (e.g. a PV array) as seen from above.
PV SYSTEMS
NOTES:
1.STRINGNOMENCLATUREASFOLLOWS:“X-SY”
WHEREX= INVERTERNUMBER
Y=STRINGNUMBER
2.STRINGSTOGAINOVERCURRENTPROTECTION (IFREQUIRED)AND
ISOLATIONATTHEENDOFEACHPHYSICALROWCLOSESTTOTHE
POINTOFCONNECTION
String layout: Designating modules to the selected inverter and string.