AC-coupled
A battery inverter operates alongside a suitable existing solar inverter. This can be a practical retrofit option, subject to system compatibility, network requirements and the intended backup configuration.
Home battery storage
Your solar doesn’t stop working when the sun goes down.
Store more of the energy your solar panels generate and use it when your home needs it. We’ll help you find a battery setup that makes sense for your household.
Home batteries
More of your own energy. Less reliance on the grid.
Your solar panels generate electricity during the day, but many homes use a significant amount of power in the evening.
A home battery can store surplus solar energy and make it available later, helping you use more of the electricity your system produces.
Whether you’ve already got solar or you’re planning a complete new system, we’ll help you understand your options and choose a setup that suits your home.
What we do
Battery solutions built around your home.
Battery storage for existing solar
Explore compatible battery options without automatically replacing a working solar system.
New solar and battery installations
Plan solar generation and battery storage together for a more integrated home energy setup.
Hybrid battery systems
Compatible hybrid inverter and battery configurations designed to manage solar generation, storage and household energy use.
AC-coupled battery solutions
Battery systems that can be added alongside suitable existing solar installations, subject to equipment compatibility and site requirements.
Backup power options
Explore essential-circuit or whole-home backup using compatible equipment and an appropriately designed installation.
Battery upgrades and expansions
Assess whether compatible modular battery systems can be expanded to accommodate changing energy needs.
See also:Solar PV SystemsInverter ReplacementsSolar Health ChecksSolar & BatteriesSolar in KallarooSolar in CurrambineSolar in Ocean ReefSolar in Mullaloo
Existing solar
Already have solar? You might not need to replace it.
If your existing solar system is working well, adding battery storage may be possible without replacing the panels or existing inverter.
The best approach depends on the age and condition of your system, equipment compatibility, available solar generation and what you want your battery to do.
We’ll assess the existing setup before recommending whether to keep it, modify it or explore an upgrade.
Hybrid
A compatible hybrid inverter manages solar PV and battery storage within an integrated system. This can suit new installations or some upgrades where replacing the existing inverter makes sense.
Battery sizing
The right battery isn’t always the biggest one.
Battery capacity is only one part of choosing the right system.
A larger battery can store more electricity, but it’s important to consider whether your solar system can regularly charge it and how much energy your household actually needs after sunset.
Evening and overnight usage
How much electricity your home consumes when solar generation is low.
Available surplus solar
How much generation remains after your daytime household consumption.
Battery capacity
The amount of usable energy available for storage and later consumption.
Battery output
How much electrical power the battery inverter can supply at one time.
Future plans
Electric vehicles, additional air conditioning, electric hot water and changing household requirements.
Backup requirements
Whether the battery will also support selected circuits or larger household loads during outages.
Backup power
What happens when the grid goes down?
Not every home battery automatically provides backup power.
With suitable equipment and electrical design, some systems can continue supplying selected household circuits or larger portions of the home during a grid outage.
No backup
The battery operates during normal grid conditions but does not supply the home during an outage.
Essential-circuit backup
Selected circuits, such as refrigeration, lighting or certain power points, can be supported within the system’s limits.
Whole-home backup
Compatible systems may support a larger portion of the home, subject to inverter output, electrical configuration and connected loads.
A few things worth knowing
- Battery capacity (kWh) determines stored energy.
- Inverter output (kW) limits simultaneous power delivery.
- Three-phase properties may have additional per-phase limitations.
- Large air conditioning systems, cooking appliances and other high-demand loads require careful assessment.
- Backup functionality may require additional equipment, switching and electrical work.
- Solar charging during an outage depends on the specific system and configuration.
- Backup duration cannot be guaranteed.
Free Home Energy Assessment
How much battery storage does your home need?
Explore battery options based on your electricity usage, existing solar system and future plans. Our free Home Energy Assessment helps you understand what might suit your household before requesting a personalised proposal.
How it works
- 1Tell us about your home
- 2See what suits your usage
- 3Talk through next steps with us
Battery equipment
Good equipment. The right configuration.
Choosing a battery involves more than comparing storage capacity.
Inverter compatibility, usable capacity, charging and discharging power, monitoring, backup capabilities and warranty conditions all matter.
We’ll help you understand the differences and recommend a system that fits your home and priorities.
- Usable battery capacity
- Inverter compatibility
- Charging and discharging power
- Backup capabilities
- Monitoring and smart controls
- Manufacturer warranty conditions
- Future expansion possibilities
Rebates & incentives
Understanding battery rebates.
Eligible home battery installations may qualify for government incentives that reduce the upfront cost.
The amount and eligibility depend on the system, installation date and applicable program requirements.
We’ll help explain the available incentives when preparing your proposal.
Our process
A battery setup designed around the bigger picture.
Step 01
Understand your energy use
We review your electricity consumption, existing solar generation and what you want from battery storage.
Step 02
Design your system
We recommend suitable equipment, capacity and backup options based on your requirements.
Step 03
Install
We complete the agreed installation, associated electrical work and applicable approval processes.
Step 04
Test and hand over
We commission the system, verify operation and explain the monitoring and relevant operating features.
Why Westcoast
Good advice before a big decision.
Battery storage can be a valuable addition to your home, but the right setup depends on much more than how many kilowatt-hours you can fit on the wall.
We’ll help you understand what your existing solar can support, how different battery configurations work and whether backup power makes sense for your household.
Our focus is on clear recommendations, thoughtful system design and an installation that works with your home.
Founder-led local business
A Perth business that is locally owned and led by its founders.
Clear communication
Plain-English advice on how the options work and the trade-offs.
Upfront pricing
A clear proposal, so you know what to expect before work begins.
Practical system recommendations
A system that fits your home and plans, not a standard package.
Solar PV and battery accreditation
Both founders hold Solar Accreditation Australia accreditation.
Professional electrical installation
Carried out by a licensed electrical contractor.
FAQs
Battery questions
Quick answers to common questions. If yours isn't here, give us a call.
Often, yes. The best option depends on your existing inverter, solar generation, electrical configuration and the battery system you’re considering. We’ll assess compatibility before recommending a solution.
It depends on your evening and overnight electricity usage, available solar generation, budget and future plans. A larger battery isn’t automatically the better choice.
That depends on how much surplus electricity your solar panels generate after meeting daytime household demand. We’ll consider seasonal generation and usage patterns when assessing battery capacity.
Only if the system includes compatible backup functionality and has been installed and configured for it. Some systems support selected circuits, while others may support larger household loads within their output limits.
AC-coupled systems typically use a separate battery inverter alongside a compatible solar installation. Hybrid systems use a compatible hybrid inverter to manage solar and battery storage. The right option depends on your existing equipment and what you want the system to do.
Yes. Suitable battery configurations are available for three-phase properties, but backup behaviour and available output can differ between systems. We’ll assess the electrical supply and your requirements.
Some modular systems support expansion, subject to manufacturer compatibility, equipment limits and installation requirements. It’s worth considering future capacity when choosing the initial system.
Eligible installations may qualify for government incentives. Availability and eligibility depend on the current program rules, approved equipment and installation requirements. We’ll explain applicable incentives when preparing your proposal.
Battery lifespan depends on the product, operating conditions and usage. Manufacturer warranties often specify a period and minimum retained capacity or energy throughput. We’ll explain the warranty terms for the equipment proposed.
Not necessarily. If your existing solar system is suitable, it may be possible to add storage without replacing the panels. We’ll review its condition, generation and compatibility first.
Get in touch
Let’s find the right battery setup for your home.
Already have solar or planning a complete new system? Tell us a little about your home and what you’d like your battery to do.
Start Your Free Energy Assessment →