Solinba on Grid Solar inverter 500w DC22-56v to AC90-130v for 24v Solar System USA plug Important note: on grid tie inverter, it need to plug into your home grid, CAN'T power your device directly. for 24v solar system, the best working voltage(MPPT) is about 38-48v. Multi-protection function: Over Current Protection/Over Temperature Protection/Reverse Polarity Protection/Island Protection Features: Stackable/MPPT-Maximum Power Point Tracking/Automatic Sensing Function Solar Luminosity and restart automatic every morning Safety: DC and AC all have fuse to protect the people + power switch +we do the speical for the aluminum shell, it is insulation Cooling method: fan-cooled+aluminum shell, more better cooling function, smart and light (1.8 kg), easy to carry and handle.