Ever since I installed a deye sun hybrid inverter with a 10kWh lithium battery at home, my evening electricity routine has changed. Before, the solar panels exported most of their midday production, while we bought power back during the expensive 4–9 p.m. window. Now I set the battery to charge from solar first and discharge during peak hours.

On a typical sunny day, it reaches 100% by early afternoon. After cooking dinner, running the heat pump, and putting on the dishwasher, the battery usually sits around 35–45% before bedtime. That shift has made the biggest difference to my bill. My peak usage used to be roughly 8–12 kWh each evening; now it is often below 2 kWh. Over the first full month, my electricity bill dropped by about 30%, not because the house suddenly became more efficient, but because I stopped buying as much peak-rate energy.

The only hiccup was a low-battery warning on a cloudy afternoon. I initially thought the battery had failed, but the monitoring app showed the state of charge had reached its reserve setting. I had accidentally left backup reserve at 30%, so the system was protecting that capacity instead of running the house completely flat. Lowering the reserve to 20% restored normal evening discharge, and I now leave 25% because short outages do happen here.

I like being able to check solar generation, battery level, and household load from my phone without guessing. The numbers are not perfectly consistent—rainy days still mean grid power—but the battery storage system has made our usage calmer and more predictable. I am not trying to chase total energy independence; I mainly wanted practical peak-hour savings and backup power. For me, this setup earns its keep through that simple daily cycle: solar in, battery charging midday, battery discharging after sunset.