INVERTER HLN-500VA DC input voltage 12V,24V,36V,48V,60V,72V Output voltage 110V+/-10% or 220V+/-10% Output ... quick strain,anti-interference,anti-thun derstruck,steady output voltage frequency,good adaptability and practical ,which can help ... frequency≥80%Under-voltage protectionDC 9.0-10.0V/DC12VOver-voltage protectionDC 14.5-15.0V/DC12VUnder-voltage protection and over-voltage protection of battery ...