Yes, right now I’m testing a new off grid solution with a solar panel, 20W and 12V or 5V ( aliexpress.com 20W 12V/5V Waterproof Solar Panel Kit ). I use a Wemos D1 mini Pro with external antenna and battery shield. A 18650 Li-ion 3400 mAh battery back up. Everything seems to work pretty well in my indoor test environment so far but we don’t have enough sunlight here this time of the year.
I have a similar system connected since almost a year on another platform. There I can check how the food is consumed and the temperature in, and outside the hive during the winter. Right now the temperature is inside + 23° C and outside of -15° C. The weight of the hive is now 51.8 Kg. It’s 1.6 kg less than a month ago.