Samlex 300W Pure Sine Wave Inverter - 24V Commercial grade design suitable for heavy duty loads, long periods of continuous operation & for emergency back up. Wide operating DC input range: 21.0 - 33.0 VDC UPC  Universal Protection Circuit: low voltage, over voltage, over temperature, over load and short circuit LED indicators for power and protections. Dual GFCI protected AC outlets. Temperature controlled cooling fan  reduces energy consumption Detachable cable with 12V plug adapter. Detachable cable with battery clamps Safety certified to UL & CSA standards, FCC compliant