Product details:

Load and automatic PV-based lighting control Charges all battery types including Lithium Ion Continuous charging and no damage from PV array oversizing Up to 256 days of data logging Built-in self diagnostics Morningstar PS-MPPT-40 ProStar Charge Controller. The NEW ProStar MPPT is a mid-range MPPT solar charge controller with TrakStar Technology that provides maximum power point tracking (MPPT) battery charging for off-grid photovoltaic (PV) systems up to 1100 watts.