30kWh Solar Battery

A 30KWh battery doesn’t just sound impressive—it’s a solid storage size for most Aussie households. But before jumping in, it’s important to understand what this capacity actually means.

 Energy vs. Power—Know the Difference

A 30KWh battery means it can store 30 kilowatt-hours of energy. Think of it like a fuel tank filled with electricity.

• Energy (KWh): This is how much electricity your battery can hold.

• Power (KW): This is how fast the stored electricity is used.

So, if your household uses around 30KWh a day (which is pretty standard across Australia), a fully charged battery could, in theory, run your home for a full 24 hours—in perfect conditions.

But in the real world, a few things come into play.⁣ 

What Impacts the Battery’s Lifespan?

1. Your Appliances’ Demand (Peak vs Steady Usage)

Not all devices use power the same way. Big items like air conditioners or dishwashers pull heavy loads (called peak loads) and will drain your battery quicker than steady, lower-consumption devices like lights or fridges.

2. Usable Capacity (Depth of Discharge)

Most batteries don’t enable you to use 100% of their energy. For example, lithium-ion batteries are typically designed to use around 80% of their total storage. So from a 30KWh battery, you might only get 24KWh of usable energy.

3. Solar Charging During the Day

If your battery is connected to solar panels, it can recharge with sunlight during the day. If you balance your usage and solar generation correctly, your battery can last longer—or even indefinitely—on sunny days.

4. Smart Energy Management Helps Too

Modern energy systems can automatically prioritise the important stuff, like lighting and the fridge, while turning off non-essential things temporarily. That way, your battery doesn’t get drained unnecessarily, giving you more hours of backup.