The maximum input wattage of Explorer 1000 is 200w(12~30V,7.5~8.33A ). As for recharging time, it depends on which panel you are using and weather conditions, for example, the Explorer 1000 can be quickly recharged within 8 hours by connecting two SolarSaga 100W solar panels together with an adapter cable. If connecting only one single panel, the approximate recharging time is 17 hours. Recharging time may varies from different location, temperature, weather etc, the actual time may be different.