The Grandwatt innovative SX9-400 series solar light tower is the economical model of SX9 solar series which have very high cost performance, it allows site lighting to increase sustainability with zero CO₂ emissions and zero noise, zero operating costs (diesel fuel, maintenance, labor), it is 100% renewable energy, smaller and exquisite stronger structure can load more power solar panels and batteries, patented lifting mechanism can adjust tilt angle of solar panel to align with the best sunlight direct angle to achieve maximum solar yield. Equip with latest photovoltaic and energy storage controller system, very intelligent, it can be monitored by cell phone APP to set auto timer switches auto tum on-off the lights.