The SAKO Alpha ESS-300W provides reliable portable and backup electricity with a 1kWh built-in cell capacity and 300W rated output power. Its AC output operates at 185–230VAC, 50Hz, with a maximum AC output power of 300W. The unit supports AC input of 90–280VAC at 45–65Hz and up to 300W AC charging power. Solar charging accepts 10–55V DC PV input and up to 300W PV charging power, while combined utility and solar charging reaches 400W maximum. DC output is rated up to 12V/60W, with 5V/5W USB charging. It can work with a 150–550W solar panel and power compatible LED lights, DC fans and a 50W smart TV. Operating temperature is -10°C to +50°C, with IP21 protection. 5-year warranty.