Doom5003

Our useage was averaging out about 14 kw/h a day. So not a lot less than you, and the system could take more load as most days the battery is recharged by midday and the Goodwe derates the solar panels so that they just service the load.

It still retains a grid connection, so we can play it all ways. Most days it produces most of our power whilst additionally giving us protection against outages. The battery always gets us through the night and then unless the weather is foul we get solar in the morning.

We can also run it like a UPS and use grid to charge up the batteries, but increasingly I am leaving to it's own devices.

You can have rules (and this is not unique to Goodwe) like "only run the battery down by 60% if there is grid power available". So that means we would always have 40% in the battery if the power goes out.

Generally I think what you are aiming towards is a hybrid system. I have a Goodwe, but it's not the only such. So I think what you need as a foundation for the system is an inverter that can be run in that mode. Then you add panels, increase batteries with time and budget.