Tripp Lite 1250W PowerVerter RV Inverter/Charger with Hardwire Input/Output

I was searching for a versatile Inverter that charges batteries from A/C power for use with my basement sump pump. This unit it probably a bit larger than I needed, but teamed up with a marine battery, it seems to be doing the job. After fully charging the battery and unplugging the Inverter, the pump ran for 8-hours (the pump was running about once every 20-30 minutes for 20- seconds.) At the end of the test period, the battery was still almost fully charged. Of course that's a function of the battery...but the point is the Inverter did not fail or overload while in use. If we get a long-term power outage, there appears to be enough capacity to also run pumps installed in my window wells (one at a time) or the refrigerator if water incursion is not a threat.