I have a similar Growatt from siganture solar. I'm pretty sure they're made by the same manufacturer as EG4. The cheaper one can do it, in a solar > utility > battery priority mode.

But depending on your solar panel and consistent power draw, I'd maybe use the solar > battery > utility mode. It'll let you set a point to switch from battery to utility, the highest at 95%. That way when your usage is below your solar generation, you can still use the solar to charge the battery.

A bit more wear and tear on the battery, but even less solar wasted. Assuming you can handle the batteries only being at 95% if you have an outage. If your usage is less than your solar generation, could even set it lower.

I've been looking at something similar but different. My grid is fine, but I want to be able to use the batteries based on my time-of-use plan prices. I have less solar panels, but would want to charge my battery using grid power when prices are lower.

Seconded. The thing I’m using here is basically an EG4 knock off and I copied the wiring from the Will Prowse EG4 3000W mobile solar power guide (linked under how to) - which makes me think it’s the same board inside.

I like that their 3K inverter works with a 48-volt battery bank. They seem incredibly low cost for the value.