Home Battery Buying Guide for Australia

 


Adding a home battery to your solar system can save you more money. It also helps keep the lights on during blackouts. But buying one is not simple. It’s not like buying AA batteries from the shop. You need to know what they cost, which ones work best, and if home battery worth the money. Let’s break it down.

How Much Does a Home Battery Cost?

A good battery costs around $10,000 before installation. After installation, the total cost can range from $15,000 to $33,000. Why so expensive? Two things drive the price: capacity and brand.

  • Capacity is measured in kilowatt-hours (kWh). Bigger batteries store more energy but also cost more. Don’t buy anything less than 10kWh.

  • Brand matters. A well-known brand like Tesla is more expensive than lesser-known ones.

Installation costs vary too. Simple jobs cost less. Tricky ones—like those needing long cables or fireproof walls—cost much more.

Are Home Batteries Worth It?

That depends. Batteries can save you money. But the payback time varies.

Let’s say you buy a Tesla Powerwall for around $15,500 (fully installed). If you’re on a flat electricity rate, it could take over 12 years to earn back that money. But if you’re on a Time-of-Use (TOU) tariff, you may break even in just 6 years.

TOU tariffs charge different prices depending on the time of day. Electricity is expensive in the evening. It’s cheaper at night or midday. Batteries help you avoid high-cost times by using stored solar energy instead.

Some electricity companies offer special rates. One of them, Amber, bases its prices on the wholesale market. Prices change every 30 minutes. That can be risky. But some users report saving over $2,000 a year.

Pro tip: Never buy from door-knockers or random calls. Always do your own research. Try online calculators to check how long your battery will take to pay for itself.

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