You may be wondering how solar panels can function in an area that experiences long, harsh winters. After all, solar panels do rely on the sun in order to deliver power.
However, the last 10 years have brought much innovation and progress to solar panel technology. Now, even if it’s snowy, cloudy or rainy, solar panels can easily make electricity.
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If you have an off grid system that works independently of a power utility company, your solar energy system will include a set of back-up batteries. These batteries are like the ones used in cars. They are designed to hold any excess electricity that your solar panels make during the sunny part of the day. The back-up storage system should have enough of these batteries to store energy in correspondence to the number of overcast days typical for your geographical region.
If your system is tied to the grid (connected to the local electric company) it won’t use storage batteries. After the sun goes down or if there are several days of inclement weather blocking the sun, your system will automatically use electricity from your local power company. Of course, during sunny days, your solar panels will be generating your electric power, so you will still be benefitting from lower electric bills.
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Some utility companies may even allow you to sell electricity back to them. This arrangement makes solar panels even more cost effective. The way this is set up is that excess power produces by your solar panels goes back into the company and you received credit for it on your bill. That way, even if you need to use electricity from the grid during the night or during overcast days, any unused electricity that your solar panels were able to produce will still be lowering your overall energy bills.