In partnership with
Everything GTM. One platform.
Small teams don't have time to stitch together five tools and hope it works.
Apollo gives you everything you need to find leads, reach them, and close deals — all in one place:
230M+ verified contacts
AI-powered outreach
Data enrichment
Inbound lead capture
Meeting scheduler
And more
Stop juggling tools and start building pipeline that scales.
With Apollo, the AI revenue engine powering 4M+ users.
AS 4509.2-2010
Where Australia's Solar Resource Data Comes From
The Bureau of Meteorology (BoM) maintains a national solar radiation database from pyranometer measurements at ground stations and satellite-derived estimates. This data is published as monthly and annual mean daily solar exposure (MJ/m²/day) and can be converted to Peak Sun Hours (PSH) for system design. AS 4509.2 explicitly references BoM data as the source for solar resource input to the energy balance calculation.
Converting MJ/m² to Peak Sun Hours
PSH = Solar Exposure (MJ/m²/day) / 3.6
Example: Dubbo, NSW — June average solar exposure = 12.5 MJ/m²/day.
PSH = 12.5 / 3.6 = 3.47 PSH in June (the design month for this location).
Solar Resource Across Australia — Design Month PSH
Location | June PSH (Worst Month) | Annual Average PSH |
|---|---|---|
Darwin, NT | 5.8 | 6.4 |
Alice Springs, NT | 5.2 | 6.6 |
Brisbane, QLD | 4.0 | 5.2 |
Perth, WA | 3.5 | 5.5 |
Sydney, NSW | 3.0 | 4.7 |
Melbourne, VIC | 2.4 | 4.4 |
Hobart, TAS | 2.0 | 4.0 |
Tilt Angle Correction
BoM horizontal irradiance data assumes a flat surface facing the sky. Tilted, north-facing arrays capture more energy. The optimal tilt for maximising annual yield is approximately equal to the site's latitude. For maximising winter yield (important for off-grid sizing), tilt the panel at latitude + 10–15°. Most solar design software (PVSyst, SAM, PVcalc) applies tilt corrections automatically when the BoM data is used as input.
Engr. Jason Morales — Founder, SolarEnergyPH
