Off-Grid: 5,000 watt inverter running my well pump

When I considered buying the Delta Pro, I thought it would run my 1hp well pump in an emergency - it will not. To fix that problem, I bought a Vevor 5,000 watt pure sine wave inverter and a dedicated 100 amp/hour 12v battery. When I tried to charge the Delta Pro from a modified inverter connected to my car on a cloudy day, it would not charge. Ecoflow customer service informed me that I must use a pure sine wave inverter or generator. So this inverter solves 2 problems at the same time. Now I have a back-up to my Delta Pro that will run my well pump!
Vevor inverter: m.vevor.com/pu...