One problem, however, is the restless running. First, the pump is just very loud and must be placed on a gepolsteren underground. Secondly, I would like to run the pump at a small inverter to a battery. Whether the information is consistent with the 30W, I have not checked, but the pump is not running on a 100W inverter. Within one second switches off with a fault message. A stronger inverter for a test run was not available to me. The operation at the generator or of course to the power supply is not a problem.
But overall a very good price / performance ratio and recommended for appropriate application area also.