Solar vs battery vs both: what actually cuts your power bill

Solar panels and home batteries solve different problems. Understanding the split is the fastest way to know what will actually lower your bill and keep your home running.

What does solar alone do?

Solar reduces the grid electricity you buy during daylight. It is excellent at shaving daytime usage, but on its own it produces nothing at night and — critically — shuts down during a blackout. For safety, a standard grid-connected solar inverter disconnects when the grid goes down, so solar-only homes lose power in an outage just like everyone else.

What does a battery add?

A battery stores surplus solar so you can use it after sunset, and it provides backup power during outages. This is where resilience comes from. In South East Queensland, where storm-driven outages are common, battery backup is the difference between your home staying on or going dark.

Solar vs battery vs both — quick comparison

• Solar only: lower daytime bills, no night-time benefit, no blackout protection.
• Battery only: can shift grid energy and provide backup, but without solar you're still buying all your energy.
• Solar + battery: biggest bill reduction, night-time self-supply, and genuine backup.

How Pi packages this

Pi installs both solar and a high-capacity battery at no equipment cost, sized to your home, under a fixed $0.26/kWh rate — with solar recharging the battery each day to extend your backup. You get the full solar-plus-battery outcome without the upfront cost or the maintenance, currently across the Gold Coast to Brisbane corridor.