Solar only vs solar + battery: is a battery actually worth it?

Once someone's decided to go ahead with solar, the very next question is almost always the same: do I need a battery as well, or is solar on its own enough? There's a genuine, honest answer that depends on your household — not just "yes, obviously," even though we sell batteries.

What solar alone actually does

• Generates power during daylight hours and offsets whatever you're using in the home at that moment — free power while the sun's up.
• Anything you generate but don't use gets exported to the grid for a feed-in credit — typically a fraction of what you pay to buy power back at night.
• Savings scale with system size: roughly $1,800–$7,500/yr depending on your usage band — see what size solar system do you actually need for the full breakdown.
• No backup power. Standard grid-connected solar is required by Australian wiring rules to shut itself off during a blackout, for the safety of anyone working on the network — so without a battery, your panels do nothing at all when the grid goes down, even in broad daylight.

What adding a battery changes

• Stores your own excess daytime solar so you use it that evening instead of exporting it for a low feed-in credit — the main financial case for a battery.
• With backup configured, keeps your fridge, lights and essentials running automatically when the grid drops out — genuinely relevant here, since regional properties across Northern Victoria and the southern Riverina see more outages than city homes.
• Current GoodWe ESA pricing: $8,900 (16kWh), $11,900 (24kWh), $14,900 (32kWh) or $17,900 (40kWh) installed — see our GoodWe ESA vs Tesla Powerwall comparison for the full spec rundown.
• Currently eligible for the federal Cheaper Home Batteries Program on top of the above — worth acting on while the discount is at its highest tier, since it steps down over time.

When solar-only makes more sense

If your household usage is modest, you're mostly home and using power during the day anyway, or budget is genuinely tight, solar on its own pays for itself faster in raw dollar terms — a battery is a bigger upfront outlay that takes longer to earn back purely on bill savings. There's no shame in starting with solar and adding a battery later; the modular GoodWe ESA range is built for exactly that.

When a battery earns its keep

Bigger households with real evening usage (dinner, TV, ducted A/C after dark), farms and rural properties where a grid outage means more than an inconvenience, and anyone who wants backup power without a generator, are the customers who see a battery pay off — both financially and in peace of mind. If you're already leaning towards 13.3kW or 17kW solar, a battery is worth serious consideration; at 17kW we require one, since usage that high needs somewhere for the extra daytime generation to go.

Not sure which side you're on?

That's exactly what a real quote is for — our Quote Builder asks about your usage and battery interest together and gives you a live estimate either way, no pressure to add a battery you don't need. Or call Brooke on 0408 258 298 to talk it through.