The operating duration of the power supply is dependent on the power consumption (wattage) of the devices connected to it. When devices with higher power consumption are utilized, the battery will discharge more rapidly.
Kindly contact customer service and provide the wattage of the devices you are using. Upon receipt of this information, we will be pleased to assist you in verifying whether the performance falls within the normal range.
Please note that the inverter itself also consumes power during operation, with a standby power consumption of approximately 12W. When using low-power loads, such as a 36W fan, the inverter's power loss constitutes a larger proportion of the total output, which may result in the actual available capacity appearing lower than expected. Please be assured that if any quality issues arise, we will assume full responsibility and assist you in identifying an appropriate solution.