The 72 Watt flexible module is supplied with the SOLO-BUCKET SOlO1 model which can house between 8Ah Gel batteries and a 30Ah LiFePO4 battery. The charge time to take the 30Ah battery from 80% depletion (controller prevents the battery from being 100% depleted) to fully charged can vary depending on the location, orientation of the module and many other factors. In the Southern Hemisphere at -33º latitudes, without shading at peak irradiance season, the battery is charged to 100% in an average of 3 hours. The module is placed on the ground at horizontal position, uncleaned and charging begins at approximately 06h00. These tests are real-world, non laboratory in order to replicate actual performance. No load is used during the tests. Using the smaller capacity 8Ah or dual 8Ah variations will yield different results. An 8Ah battery will charge much faster, but delete much quicker due to the lower capacity.