I installed a 10kWh lithium ion battery system at my Cape Town home six months ago, mainly to stop buying expensive evening electricity from the grid.

Setup was less intimidating than I expected. The installer mounted the lithium-ion battery beside my inverter in the garage, added a battery management system, and programmed it to charge from my rooftop solar during the day. I chose this particular unit after searching online for “lithium ion battery cape town” and comparing local warranties, prices, and replacement support.

The biggest difference appears between 5pm and 9pm. Before storage, my heat pump, fridge, Wi-Fi, and lights were all running while the tariff was highest. Now the battery automatically carries those loads. On a normal sunny day, it reaches full charge by early afternoon, and I finish the evening with roughly 30–40% remaining. My monthly bill has fallen by about 35%, although the exact saving changes with cloudy weather and how much we use the oven or geyser.

I particularly like seeing the monitoring app show solar generation, battery state of charge, and household consumption in real time. It helped me notice that the pool pump was starting during the peak period. I shifted its schedule to midday and saved even more without changing our routine much.

There was one small hiccup during a week of rain: the battery stopped discharging at 20%, apparently because I had accidentally enabled backup reserve mode in the app. After switching it back, the system behaved normally. That was a useful reminder that solar storage still needs occasional attention, not just installation and forget.

So far, this home battery has made evening power feel more predictable and reduced my dependence on grid electricity. I would recommend a properly sized lithium battery to anyone considering solar.