How long will the battery capacity last for each unit?

The duration that a battery will continue to provide available power to charge devices is a function of battery capacity, daily usage (mobile device charging), and solar energy generation, which is affected by the installation location (city) and time of year. There are more daylight hours in the summer than winter and differing levels of solar irradiance around the country. Generally speaking, our systems are designed to provide 2-3 Days of Autonomy during periods of bad weather.