--- /dev/null
+[[!meta date="2023-06-11 13:27:13 +0800"]]
+[[!opengraph2 ogimage="https://www.vanrenterghem.biz/blog/pics/solarExposure.png"]]
+[[!tag R analysis weather visualisation]]
+
+Perth, Western Australia is a sunny place, as any local will
+confirm. Combined with subsidised buyback tariffs for electricity
+returned into the grid, this has resulted in many local households now
+having an array of solar panels on their roof.
+
+What most will intuitively understand is the production of these
+panels varying over the year. That's a combination of the differences
+in average cloud cover on the one hand, and on the other hand the
+amount of energy that falls down on the panel from the sun varying
+over the year due to the tilted axis of the earth.
+
+Combined, this results in significantly different levels of energy
+available on our roofs throughout the year.
+
+[[!img /pics/solarExposure.png alt = "Perth solar exposure variation" class="img-fluid"]]
+
+__Table:__ Average solar exposure per m<sup>2</sup> in Kings Park, Perth Jan 2017
+to Jun 2023.
+
+[[!table header="row" data="""
+__Month__|Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec
+---|---|---|---|---|---|---|---|---|---|---|---|---
+__MJ/m<sup>2</sup>__|949,152|741,432|642,187|484,428|362,085|280,690|297,863|411,215|548,154|718,831|831,845|958,651
+"""]]
+
+Right now in June, we're at the low point for the year in expected
+yield from a solar panel, with just about a third of the energy being
+generated that we can expect to get in Dec.