After being annoyed for the longest time with the very limited geyserwise, I installed the geyserwala about a year ago. There’s few upgrades that I’ve done that’s been this helpful as the geyserwala. The biggest benefit for me was that I incorporated it into NodeRed, which is running on my virctron system. So now I don’t use timers anymore, but rather a formula that takes into account the SOC of my batteries, available solar power and weather prediction. Often we either had dead batteries or cold water, but now the program sorts it out much much better than regular timers. Very happy with the geyserwala!
Some more info of my system: