First time posting so I apologize if I botch this.
I want to create a system that normally runs on solar and batteries, but can pull from the grid when it is available and my batteries are not. To minimize battery count, I would like to use a 48VDC configuration.
I can size the solar panels, the MPPT, and the battery bank, but I am having a hard time with the Inverter. The only ones I can find (that seem decent from what I can read) are the AIMS inverters. I am not sure what size I need however.
Assume, that I want the house to run as though running on line voltage. So it needs to input 48vdc and output 240vac pure sine wave. Do I need to size the inverter for full saturation of the house wires? That is to say 3600 watts? Or do I need to only size for the requirements of the items I want to run during the outage (plus a bit for battery charging while on line-voltage)?
That's the other part. If the solar is down (nighttime or cloudy) I would like to charge this from the line.
The question is supposed to be about the inverter.