What should I consider when choosing a solar panel system?

[shummiclaire]

I’m comparing different solar panel and battery setups and trying to understand what factors matter most before buying. For a smaller PV system, should the inverter size be matched mainly to the panel output, or is it better to leave some room for future expansion? I’m also comparing panel efficiency, battery capacity, warranty, and overall system compatibility. While researching prices, I came across Callsun Solar Coupons, but I’m more interested in comparing the actual specifications and long-term reliability. What factors do you usually consider when choosing a solar setup?