https://www.anern.com/products/2000-12000w-solar-inverter-with-ups/ AN-SPI hybrid solar UPS inverter series is a popular low-frequency inverter of Anern. This hybrid solar UPS inverter is a DC/AC converter, which works by converting the DC power supply of the battery pack into AC power supply with stable output voltage and frequency. Using plug-and-play installation design, the solar hybrid UPS series is an excellent choice for matching solar power systems.