Solar Panels vs. Battery Storage: Which Should You Buy First?
Quick answer
Buy solar panels first in almost every case — they generate the savings;
a battery only reshuffles when you use them. A battery earns its keep separately, mainly
when there's a big gap between your peak and off-peak (or export) electricity rates. Check
both with our solar payback and
battery payback calculators.
What each one actually does
| Solar panels | Home battery | |
|---|---|---|
| What it does | Generates electricity, cutting what you buy from the grid | Stores electricity for later use — doesn't generate anything |
| Typical payback | 7–12 years | 7–12+ years, entirely dependent on rate gap |
| Works alone? | Yes — saves money on its own | Only if there's a meaningful peak/off-peak or export-rate gap |
| Backup power in an outage | No (without a battery) | Yes |
When a battery is worth adding
- Low export payments. If your utility pays little for solar you send back to the grid, storing it for your own evening use is worth more than exporting it.
- Big peak/off-peak gap. Even without solar, charging a battery off-peak and using it at peak prices can pay off if the gap is large enough.
- You need outage backup. This is a real value a battery adds that solar alone cannot — factor it in even if the pure payback maths is marginal.
The order that works for most homes
- Install solar sized to your usage (see our solar sizing guide).
- Live with it for a billing cycle or two and see your real export rate and usage pattern.
- If export payments are low or you want outage backup, add a battery — most systems support this as a retrofit.
Frequently asked questions
Should I buy solar panels or a battery first?
Solar panels first, in almost all cases — they generate the savings a battery merely reshuffles. A battery only pays for itself if there is a meaningful gap between your peak and off-peak (or export) rates.
Is a battery worth it without solar?
It can be, if you have a large gap between peak and off-peak electricity rates, or you specifically need backup power during outages. Otherwise the payback is usually longer than solar alone.
Can I add a battery later?
Yes — most solar systems can have a battery added later ("AC-coupled" retrofit). It is common to install solar first, then add storage once you know your real export rates and usage pattern.
General information, not financial advice. Get quotes and check your utility's specific
net-metering/export rules before deciding.