We have heard of a number of individuals running their sensors with solar power. However, we personally have not tested PurpleAir sensors using solar power in-house. That said, it seems reasonable that solar panels between 10W and 15W should be adequate to power a battery pack to run a PurpleAir sensor. How quickly that battery pack recharges is situationally dependent and might take some experimenting on your part to fit the seasonal sun conditions. Power draw: The sensor uses 180mA (milliamp), about 1W. We have experimented with a 20Ah battery pack and it kept the sensor running for about four days.