EverExceed's Thunder MPPT solar charge controller is an advanced maximum power point tracking (MPPT) battery charger for off-grid photovoltaic (PV) systems . The controller provides the industry's highest peak efficiency and significantly less power loss compared to other MPPT controllers along with unique safety features make it universal top-grade charge controller. The Thunder MPPT features a smart tracking algorithm that maximizes the energy produce from the PV by rapidly finding the solar array peak power point with extremely fast sweeping of the entire I-V curve.