Is it useful to monitor rainy days with solar video?

Useful. It will continue to be used on cloudy days. Sunny days, rainy days can last for about 3/6 days, and cloudy days can be used continuously. (The solar panels are still generating electricity, and there is enough electricity. The capacity configuration of solar energy and battery is based on the best combination of camera power, not simple integration. Give consideration to the charging time and standby time in continuous rainy days, and effectively solve the problem that power supply cannot be continuously supplied in some areas due to continuous rainy days.