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20kWh Solar Batteries

A 20kWh solar battery is a high-capacity battery system designed for Australian homes and businesses with above-average energy requirements. Whether you’re powering large households, home offices, or commercial operations, this size solar battery provides the storage capacity to reduce energy bills, cut your carbon footprint, and improve grid resilience during a power outage.

At Solar Galaxy, we supply and install CEC Approved battery units from popular brands like LG Chem, Alpha ESS, and Sungrow, built with high-efficiency lithium iron phosphate technology. Whether paired with a new solar system or retrofitted to your existing solar system, a 20kWh battery provides optimal kWh storage to manage your electricity consumption, enable energy independence, and unlock long-term savings.

Thanks to new government rebates and the federal rebate, the upfront cost of installing a large battery has dropped significantly, delivering a faster payback period and a smarter investment in clean power.

Why Choose a 20kWh Solar Battery

Understanding the technical and practical features of a 20kWh solar battery is key to making an informed purchase. Below, we outline the core benefits, supported use cases, and component-level details that make this battery size a smart solution for high-usage homes and businesses. From battery capacity and inverter compatibility to warranty and storage capacity, this section breaks down what you can expect from a well-designed, expertly installed system.

  • Satisfies larger daily energy demands across home and commercial usage
  • Provides backup during outages and supports off grid applications
  • Allows for smart shifting of energy usage away from peak tariff periods
  • Enhances VPP participation and earns credits on stored energy
  • Significantly reduces reliance on the grid, reducing long-term solar battery cost

Built with long-life components, these batteries offer exceptional reliability and integrate seamlessly with your solar panels and hybrid inverter setup. They’re also modular, meaning you can scale the system based on several factors, including budget, consumption, and incentives available in your area.

Why Choose a 20kWh Solar Battery

20kWh Solar Battery Specifications

Key Benefits of Our 20kWh Battery Solutions

  • Battery Capacity: 20kWh = 20,000Wh of stored energy for homes and businesses
  • Brands: We supply top solar battery brands including LG Chem, Dyness, and Neovolt
  • Integration: Compatible with both DC-coupled and AC-coupled inverter systems
  • Monitoring: Real-time app-based performance tracking
  • Quality: Manufactured with safe and long-lasting lithium iron phosphate cells
  • Warranty: 10–15 years, depending on brand and usage pattern

Best Applications for a 20kWh Battery System

  • Larger homes running electric appliances, EV chargers, or pool systems
  • Small to medium businesses with high daytime consumption
  • Off-grid properties requiring full or partial backup
  • Solar setups aiming for complete energy independence
  • Homes or sites looking to monetise their system via VPPs

Little Effort, Big Results

Solar Is Simple With SolarGalaxy.

We Get to Know Your Energy Needs.

No cookie cutters in our tool box! We tailor the perfect solar or storage system based on your needs.

1

Leave It to the Pros.

Our expert team swoops in, designing and installing a customised solution so you can thrive from day one. We handle everything—no sweat for you!

2

Pick Your Plan. Power Your Home.

Choose a payment option that suits your needs—from no money down to predictable monthly payments, leases or upfront – You’re in charge!

3

Sit Back, We’ve Got This!

We’ve got your back with 24/7 system monitoring, guarantees, and top-tier customer support. Together, we’re creating a cleaner, greener planet—powered by the sun.

4

Which Solar Battery Size Is Right for You?

Choosing the right solar battery size depends on your daily energy use, solar system size, and whether you want backup during outages or just peak-shaving. Explore our most popular battery sizes below to find the best fit for your home or business:

Certified For Excellence

Compare Our Battery Brands

We offer a curated selection of leading battery brands known for their efficiency, safety features, smart controls, and long cycle life. These brands are compliant with Australian standards and eligible for government rebates.

FAQs About 20kWh Solar Batteries

Got Questions About 20kWh Solar Batteries? We’ve Got Answers!

It holds 20,000 watt-hours (20kWh), typically enough to support medium-to-large homes or a small business during evening hours or outages.

In 2025, the average price before rebates ranges between $16,000 and $24,000. Final battery prices depend on the brand, system type, and site needs.

Yes. We offer full retrofit services. Our team checks compatibility, adjusts wiring, and integrates with your current solar system and inverter.

Absolutely. The federal rebate offers ~$372 per kWh, up to $7,440 for a 20kWh battery. State-level government rebates and interest free loans may also apply.

It depends on your energy bills, usage pattern, and available rebates, but most users achieve full return in 6–10 years, faster with VPP benefits.

We install systems from LG Chem, Hinen, Alpha ESS, Sigenergy, and other solar battery brands known for quality, warranty coverage, and long-term reliability.

Pricing

6.6kw
Perfect for smaller homes
From $50 / month
Up-to
$
2000
Savings
  • Tier-1 N-Type High Performance Panels
  • Lifetime support included!
  • Battery and EV compatible for future upgrades!
  • Free Monitoring to track your savings!
  • Fast-track installation
Unlock Savings Now
13.2kw Solar
Best for mid-sized homes
From $75 / month
Up-to
$
4000
Savings
  • Tier-1 N-Type High Performance Panels
  • Lifetime support included!
  • Battery and EV compatible for future upgrades!
  • Free Monitoring to track your savings!
  • Fast-track installation
Unlock Savings Now
15kW +
Ideal for energy-hungry homes
From $90 / month
Up-to
$
5000+
Savings
  • Tier-1 N-Type High Performance Panels
  • Lifetime support included!
  • Battery and EV compatible for future upgrades!
  • Free Monitoring to track your savings!
  • Fast-track installation
Unlock Savings Now

Ready to install a 20kWh solar battery? Request a Quote today with Solar Galaxy. Contact Us

1300 339 596