Can I add a battery to my existing solar panels?

If you already have solar panels and want to add battery storage, you have good options. The easiest retrofit is an AC-coupled battery — this is a battery with its own inverter that connects to your consumer unit, independent of your existing solar setup. Popular options: Tesla Powerwall 2, GivEnergy AC-coupled battery, Sonnen. These work with any existing solar system without touching the solar inverter. The other option is to replace your existing solar inverter with a hybrid inverter that manages both solar panels and battery together — this is more efficient but costs more and involves more installation work. The choice depends on your existing inverter's age and compatibility. If your current inverter is more than 7–8 years old, replacing it with a hybrid while adding a battery often makes good financial sense.