Hi LikeMinded People,

any ideas on this, I read something about home assistant and automation, pls explain this to me guys?

This requires a couple of systems to talk to home assistant.

1. HomeAssistant to manage all the automation and data 

2. Geyserwise / Geyserwala to read the temp of the geyser and switch it on / off

3. Inverter integration into HA - options will depend on your inverter but SolarAssistant can obfuscate a lot of this complexity

Once all is installed you setup HA on a Pi or computer of your choosing then get the Geyserwise/wala (Tuta) and SA integrations working

When data is flowing into the system then you need to setup an automation that will use the data from the integrations based on certain triggers and conditions 

At a high level your automation would say:

turn the geyser on

then check if Eskom is off and geyser soc < x then switch geyser off

Thank you so much for this. I may be asking for way too much but I am still a newbie here. 
Do you possibly have a diagram to illustrate this with some steps? If it stop much I will certainly not take it personally you’ve done so much with the valid comments already.

Which home assistant should I get?

Geyserwise - installed

OCI inverter already intergrated in SA

PI - bought and waiting for setup.

“then check if Eskom is off and geyser soc < x then switch geyser off” - can this not be done with SA already?