No, not yet. I have a few layers of things to do before I get to that:

1. Set up a homeassistant instance.

2. Figure out logging BMS data to the instance to track battery state of charge.

3. Set up a relay that will be controlled by home assistant to turn on when the battery is fully charged

4. Install a DC tank heater that's compatible with "48V" systems.

5. Enjoy much less cost for hot water.