This is one of the most common questions we get after quoting a solar install, and the honest answer is: it depends entirely on when you use electricity, not just how much.
Why it comes down to timing
Solar panels generate most of their power in the middle of the day. If nobody's home to use that power — because you're at work, for example — it either gets exported to the grid for a small credit, or a battery stores it for you to use that evening instead.
When a battery makes sense
- Your household uses most of its electricity in the evening (cooking, heating, EV charging overnight)
- You work outside the home during the day, so daytime solar generation would otherwise go mostly unused
- You want backup power for essential circuits during a grid outage (only with compatible systems)
When it's less clear-cut
If you're home most days and already use a good share of your solar generation as it's produced — running the washing machine, immersion, or dishwasher during daylight hours — a battery adds cost without adding much extra saving. In that case, your panels alone may already be doing most of the work.
How we approach it with customers
We look at your actual usage pattern before recommending a battery — not because it's an easy upsell, but because it genuinely isn't the right next step for every home. If it does make sense, we can size it against your real evening usage rather than guessing.
Curious where you'd land? See our Battery Storage page or get in touch and we'll talk it through honestly.