While solar is still very economical in winter, there are a few factors that will reduce the performance of your solar system.

Heating Costs

Electric heating in a home can take a large portion of the solar energy output. Heating at night will impact your energy bills as it is not using your solar power. (Unless you have battery storage)

Overcast Days

Your solar panels will still operate during overcast days but at a reduced rate. Expect your panels to produce 10-40% of their rated capacity on a very overcast day

Shorter Days

With the days being shorter in winter, your solar system won’t have the usual production rate. Daylight hours in Victoria during summer average 14 hours while in Winter it is 10 Hours

Frequently Asked Questions

Will the cold weather impact my solar?

The cold weather won’t impact your solar panels. They use light from the sun, not the heat. Cool weather, and clear skies are perfect for converting sun rays into electricity.

Are solar systems effective in winter?

Yes! While cloud cover and shorter days will affect your production, your solar system will still produce enough power to reduce your electricity costs.

How many kWh should my system produce in winter?

For north systems, expect it to produce…
System Size X 2.6 =kWh avg daily winter output.
For a 5kW system, this would be 13kWh a day on average.

Why have my energy bills increased?

Your electricity bills will increase in winter due to effects on solar during this period.  If you think your system is still not performing as expected, consider whether or not these situations apply to you:

– Have your energy rates increased?
– Are you using electric heating?
– Have you bought a new appliance?
– Do you have old, inefficient appliances?
– Are new structures or trees shading your solar panels?
– Are you charging more devices 24/7?
– Have you checked your solar switch is turned on? (It can sometimes turn off in a power outage)