Small set up - sense check?
I am looking to take my sewage system onto renewable power and have acquired 4 6V 305 Ah deep cycle batteries (2024, good condition). The sewage system has 100W compressor and a 400W dirty water pump. The compressor runs for 14 hrs a day and the pump depends on how much water has entered the system - Im going to go for a worst case of 5 hrs a day. My maths says that the daily load is 1.4kwh for the compressor and 2 kwh for the pump, but I'm thinking it wont be actually 400W as its only lifting a couple of meters and the pipe length is around 30m so its not really working that hard. Tried a really cheap (Temu) current clamp to monitor what its actually using but surprise surprise it didnt work).
So let say 2.5 daily kwh is the demand on the batteries.
2 x 200W solar panels charging the batteries through a charge controller, batteries connected to be 2 x 12v in parallel and and inverter. I'm thinking the batteries will give me around 7kwh of storage. I hope the 400W input even on the West Coast of Argyll should provide enough power to keep the batteries topped up.
My other project was all 12V so I didn't need an inverter - would welcome advice of inverter size / type and I am also keen to monitor performance - battery health, charge, inputs / outputs but dont really know where to start.
All help very gratefully received and also if I am missing something obvious.