pv best practice
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Grid-connected PV installation
Best practice guidelines
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Why best practice?
AS/NZS mandate minimum requirements
Best practices go above and beyond and
include non-technical aspects
Improve the quality/reputation of the PV
industry
Some best practices may be included in
new versions of AS/NZS
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Before installation
Visit customers site before preparing
quote, dont use satellite imagery
Watch out for shading
Solar Pathfinder, SunEye, mobile phone apps,
visual estimate
Plan cable routes, inverter location, panel
layout Minimize effect of shading
AuSES PV Installation Best Practice Workshop 3
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Before installation
Watch out for meter box upgrades
Give a firm quote, no hidden costs
Give a timeline to installation and stick to
it
Assist with regulatory approvals
Grid connection, planning, RECs
AuSES PV Installation Best Practice Workshop 4
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Before installation
Give an accurate estimated energy yield
(in writing)
PVSyst
RETScreen
Manual calculations using BOM or NASA or
the ASRDH
AuSES PV Installation Best Practice Workshop 5
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Before installation
AuSES PV Installation Best Practice Workshop 6
Azimuth
-90 -60 -30 0 30 60 90
Inclination
0 90% 90% 90% 90% 90% 90% 90%
15 88% 93% 96% 98% 96% 93% 88%
30 83% 92% 98% 100% 98% 92% 83%
45 77% 88% 95% 97% 95% 88% 77%
60 69% 80% 87% 90% 87% 80% 69%
75 60% 70% 77% 78% 77% 70% 60%
90 51% 59% 63% 63% 63% 59% 51%
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Health and Safety
AuSES PV Installation Best Practice Workshop 7
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Health and Safety
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PV modules
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PV modules
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PV modules
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PV modules
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A note on fuses
Overcurrent protection may be requiredwhen multiple stings are connected in
parallel
AS/NZS 5033:2005 provides sizingrequirements for overcurrent protection
AS/NZS 5033:2005 does notprovide
mandatory trip times for protection
AuSES PV Installation Best Practice Workshop 13
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A note on fuses
IEC 61730.2 tests modules to withstand135% of the maximum series fuse rating
for 2 hours
=> size overcurrent protection so that it
does not trip under normal operation, but
trips within 2 hours of an overcurrentsituation. Look at fuse/MCB
manufacturers datasheets.
AuSES PV Installation Best Practice Workshop 14
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A note on fuses
AuSES PV Installation Best Practice Workshop 15
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Polarized DC circuit breakers
Pay attention to thedirection of current
Generally speaking,
the PV array goes inthe terminals marked
+ and
Check wiring withmanufacturer
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DC cabling
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DC cabling
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DC cabling
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DC cabling
AuSES PV Installation Best Practice Workshop 20
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DC cabling
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Inverters - good
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Inverters - good
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Inverters - better
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Inverters - best
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Inverters - best
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Labelling and documentation
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Labelling and documentation
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Labelling and documentation
Documentation should be given tocustomer after installation is complete:
Overall working of system
Data sheets and handbooks (PV modules,inverters, mounting rails)
List of equipment supplied, with serial
numbers
Wiring diagrams and string layout
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Labelling and documentation
Commissioning sheet and installation checklist
Expected annual yield
Warranty certificates and manufacturers
contact details Maintenance procedures, shutdown
procedure, alarms installed and action
required.
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Thank you
AuSES PV Installation Best PracticeW k h 31