The ACOPOWER 100W Portable Solar Panel Suitcase comes with a pre-installed 20A charge controller. This 5-stage ProteusX controller provides overcharge protection and guards against unsafe electrical conditions. It also allows expansion of the system up to 200W. Compatible with 8 Battery TypesLithium-ion, LiFePO4, LTO, Gel, AGM, Flooded, Crystal, and Calcium. Easy SetupPre-installed stand allows for easy and quick setup. MC4 connectors or Anderson plug allow easy installation to RV, camper, and trailer battery unit.5-Stage ProteusX Charge Controller20A 12V/24V built-in 5-stage solar charge controller provides overcharge protection, reducing the risk of fire. ExpandablePre-installed 20A charge controller allows expansion up to a 200W solar system. Adapter is needed for expansion (not included).SpecificationsType: Two 50W Solar PanelsFolded Size: 27.2" x 19.9" x 2.8"Net Weight: 33.1 lbs. Max Power: 100WMax Voltage: 17.8VMax Current: 1.81A eachOpen-Circuit Voltage: 22.3VShort-Circuit Voltage: 3.03A each Capable of expansion up to 200W Pre-installed stand for easy setup | Acopower PTK 100W Portable Solar Panel Suitcase with ProteusX 20A LCD Charge Controller