After installing my solar battery system last spring, I noticed the biggest difference during the evening peak period. My rooftop panels produce plenty of power during the day, but I used to send much of it back to the grid and then buy electricity again after dinner. Adding a batterie lithium 36v 100ah changed that routine.

The battery charges from solar around midday, usually reaching full capacity by early afternoon on sunny days. When the sun goes down, it powers our refrigerator, Wi-Fi router, lights, television, and sometimes the washing machine. I set the inverter to use stored energy before drawing from the grid, especially during the expensive hours. According to my utility bills, my evening electricity use dropped noticeably. My monthly bill is now roughly 25–35% lower than it was before, although winter savings are smaller because of shorter days and more heating use.

What I appreciate most is that the battery works quietly in the background. I do not need to switch anything manually. The monitoring app shows solar production, household consumption, battery state of charge, and grid usage. I check it a few times a week, mostly out of curiosity.

I did have one minor troubleshooting moment. After a cloudy weekend, the battery reached its low-voltage cutoff earlier than expected, and the inverter switched to grid power. I initially thought the battery had failed, but the app showed it was simply protecting itself from excessive discharge. Once the sun returned, it charged normally. I later adjusted the reserve setting so a little more capacity remains available overnight.

So far, this lithium battery storage setup has made my solar installation more useful, not just larger. I am using more of my own renewable energy, relying less on peak-rate electricity, and seeing practical savings without changing our daily habits. For me, that everyday convenience has been more valuable than chasing a perfect energy-independence percentage.