I have noticed that solar production is lower this year, in our region, when compared to last year. I checked out a few different accounts and see a similar pattern. Here is the results from my house in the northwest section of Philadelphia. February was up slightly (actually 8%, but only 5% when corrected for leap day)

As far as I know the reason is more cloudy days and, in January, a bit of snow. If you have noticed a decrease in your solar production, it’s not your system, it is the sky.