I installed a 10-kilowatt solar array and a 20-kilowatt-hour lithium battery in my detached garage last spring, after watching our electricity bills climb every summer. The goal was simple: charge the battery with midday solar and use that stored energy after dinner, when our utility rate jumps. Before buying, I kept seeing searches for lithium batteries canada, but I focused less on brand names and more on usable capacity and warranty terms.

The installation itself was easier than I expected. My electrician mounted the inverter beside the service panel, ran conduit through the garage wall, and programmed the battery to reserve 20% for outages. We were up and running by late afternoon. The app showed solar production, household load, battery state of charge, and grid import in one place, which made the first week surprisingly interesting. I caught myself checking it more often than the weather forecast.

The biggest difference appeared during peak hours. On a sunny weekday, the panels filled the battery to 100% before lunch. Around 5:30pm, when the oven, dishwasher, and heat pump were running, the battery carried nearly everything. The meter app showed almost no grid use until about 9pm. My first full month bill was about 35% lower than the same month last year, despite similar weather and plenty of cooking. Savings are not dramatic every day, especially after several cloudy days, but shifting those expensive evening kilowatt-hours has become predictable.

I did have one small troubleshooting moment. During a firmware update, the battery stopped discharging at the scheduled time. I restarted the inverter, checked the operating mode in the app, and discovered the update had reset the reserve to 50%. Changing it back to 20% fixed the problem immediately. It was a useful reminder that solar battery systems are not completely set-and-forget for me.