Y&H 600W Grid Tie Inverter Stackable DC10.5-28V Input AC230V

I have a 24v home power storage bank comprising 6 x 12v 100ah Leisure batteries pairs connected in series and then each pair in parallel to give me around 2.5-3kw. These are purely as overflow to my. main solar system to limit the amount I export to the grid. Once my main grid tied batteries are flat I then manual switch over to these using this unit. It provides 600w for around 30mins and then settles down to around 550 for 1-2 hours slowly degrading as the batteries flatten. It is almost linear. Obviously you must make sure not to allow the Lead Acids to drop below 50% but which this does NOT seem capable of doing. You don’t have to use batteries you can just plug your solar panels directly in if you have off grid panels.