Solar panel prices are tipped to fall after years of increases, so when's the best time to buy?

The global supply of solar panels is vulnerable to floods, fires, droughts and pandemics. (Reuters: Mike Blake)

After an unprecedented period of increases, the wholesale price of solar panels is tipped to fall, with some experts predicting sizeable drops of 10 per cent per year for the next decade.

In 2020, the cost per watt of solar energy increased for the first time in decades, as manufacturing and shipping ran into the pandemic.