I finally upgraded my RV batteries with Trojan 105 and wanted to test my offline skills. Very impressed with the performance of the device. I put a 30 amp RV plug into my 35E bus and it worked with all my RVs including "hot water pot (1500 watts)", microwave (1200 watts) and hair dryers (albeit on medium heat (with 1250/ 1500 watts) and everything worked fine. Now I did it independently and not all the same. 3000 watts take the peak burst to 6000 watts and run at 3000 watts. Although I didn't work that much at once. But impressed. only limited capacity of yours Battery, be it 12V, 24V, 48V, etc. The low voltage alarm will sound at 11.2V.