40kWh Solar Batteries

A 40kWh solar battery offers high-capacity energy storage ideal for large residential properties and industrial applications. At Solar Galaxy, we supply and install 40kWh systems using CEC-approved lithium iron phosphate (LiFePO4) batteries with excellent thermal stability, specifically designed for maximum reliability across Australia. This size supports major energy needs, backup power, and off-grid capability, helping businesses and homeowners reduce electricity bills and reliance on the grid. With the federal battery rebate offering over $14,800 off in 2025, 40kWh batteries are now more affordable than ever, making them a strategic investment in long-term energy resilience.

Why Choose a 40kWh Solar Battery

A 40kWh battery system allows for complete home energy storage or high-volume commercial energy storage. Benefits include:

  • Reliable backup during power outages and voltage instability
  • Compatible with major inverter brands and solar panels
  • VPP-ready for energy sharing
  • Efficient energy discharge across household appliances and business demands
  • Suitable for grid-tied or off-grid systems
  • Modular expansion and futureproof design for growing energy needs
Why Choose a 40kWh Solar Battery

40kWh Solar Battery Specifications

Before investing in a high-capacity system, it’s essential to understand the product details, technical capabilities, and real-world performance of a 40kWh battery.

Key Benefits of Our 40kWh Battery Solutions

  • Battery capacity: Store up to 40kWh per cycle with scalable energy storage capacity
  • Built with LiFePO4 cells for enhanced safety, low maintenance, and longer cycle life
  • Withstand temperature extremes, dust, and weather protection features for all climates including Western Australia
  • Smart monitoring and app-based control
  • Integrated protections against short circuits, over-voltage, deep discharge, and overheating
  • Straightforward installation process with neat cable routing

Best Applications for a 40kWh Battery System

  • Large residential homes with high daily energy usage
  • Commercial buildings and industrial facilities
  • Properties with frequent outages or unreliable grid access
  • Sites aiming for full energy independence and secure storage
  • Participation in Virtual Power Plants (VPPs) for optimized operation and bill credits

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:

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Dedicated, personalised support from start to finish—we’re with you every step of the way.

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Locally owned and operated, powering every corner of Australia.

Quality Installations, No Compromises

Your peace of mind is our priority—top-tier installations with a clear, step-by-step process.

Support That Lasts A Lifetime

Our commitment doesn’t end with installation. We’re here for the long run, even ten years from now.

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 40kWh Solar Batteries

Got Questions About 40kWh Solar Batteries? We’ve Got Answers!

Yes, a 40kWh solar battery is an excellent choice for larger households, especially those with high energy consumption or electric appliances. When paired with a well-sized solar system, it can provide extensive backup power and significantly reduce reliance on the grid. Many residential homes choose this size for full-evening coverage, off-grid capability, and long-term energy security.

Yes, 40kWh solar batteries qualify for generous federal incentives, with thousands of dollars available through current battery rebates. These rebates significantly reduce the upfront cost, making large-capacity systems more affordable for both homes and businesses. Eligibility depends on your location, installer accreditation, and system configuration, but most Australian households pairing a 40kWh battery with a compliant solar setup can access these savings.

Total installation costs vary by brand, location, and inverter compatibility. However, the federal battery rebate can reduce your upfront cost by ~$14,880 in 2025.

LiFePO4 batteries offer better safety, lifespan, and thermal stability than traditional lithium ion batteries. They are also more reliable under heat and provide consistent discharge performance.

Yes. Our systems are modular and support future capacity upgrades based on changing energy needs.

Battery Pricing  with Rebates

28 kWh Battery
Modern homes with
EVs or pool heating
From $25/week*
Save~
$
6,990
+/yr
Unlock Savings Now
14 kWh Battery
Small families
From $19 / week*
Save~
$
2000
+ /yr
Unlock Savings Now

* 10 Years Brighte Plan

All plans come with: 10 years Warranty, and Lifetime Support via Solar Galaxy & Manufacturer

Ready to install a 40kWh solar battery?  Request a Quote today with Solar Galaxy.

1300 339 596