Product Features: 1. Suitable for 18V or 36 cells solar panel, Vmp: 18-21V, Voc: 20-24V. 2. Support for small power wind turbine using grid power. Wind turbine DC input: 24V. 3. Creative MPPT tech makes efficiency higher than 99%. Reaction more sensitive and MPPT locking faster. 4. Adopting high-frequency isolation transformer, high efficiency, and high security. 5. Creative circuit design and imported industrial electronic components make application efficiency higher and performance more stable. 6. Parallel modular components design (stacking use) is convenient for systems setting, flexible combination and system scalability.