I'm looking into geyser smart switches at the moment. Can I ask what you are using?Just had my system turn off on me, all my fault though.
Loadshedding and geyser was on, oven was on, microwave was going, sun went behind the clouds and batteries couldn't keep up
It all came back pretty quickly and my smart switch on the geyser automatically returns to an off state so that's actually convenient. I'll have to set my HA automation to always turn off the geyser during loadshedding, and not just at night like I have it now.

