Comment by jampa

The new rule here requires you to pay for part of your imports (up to ~60%), even if you export more. I know people who installed batteries in the inverters because of this. It is more expensive overall (hybrid inverter + LFP batteries) but has other benefits (blackouts are not a problem, most months you don't even use the grid). I imagine that once sodium-ion battery production scales and costs decline, this will become the "default" option for a solar installation.