All-in-One vs Split Energy Storage Systems: Which One Fits Your Solar Needs?

Introduction: Understanding Your Solar Storage Options

As rooftop solar adoption continues to grow across Australia, so does the need for smarter, more integrated energy storage solutions. Homeowners are no longer just installing panels, they’re thinking about how to store and use their solar power efficiently, especially during outages or peak demand hours. That’s where energy storage systems (ESS) come in.

But not all ESS setups are created equal. Today, two main types dominate the market: All-in-One Systems and Split Systems.

So, what’s the difference, and which is right for your home?

What Is an Energy Storage System?

At its core, an Energy Storage System (ESS) allows you to store excess energy generated by your solar panels during the day and use it later when the sun isn’t shining, at night or during blackouts.

A typical ESS includes:

• Solar battery
• Hybrid inverter or separate inverter + charge controller
• Monitoring interface
• Optional backup capability (off-grid mode)

All-in-One vs. Split Systems: What’s the Difference?

All-in-One ESS

An All-in-One system combines the inverter, battery, battery management system (BMS), and software into a single, pre-integrated unit. These are often stackable and modular.

Example: Sofar PowerAll

Split System

A Split System is a more traditional setup where you buy separate components, like an inverter, battery bank, and controller, and wire them together on-site.

Example: Swatten Stackable Battery paired with a Deye or Growatt inverter.

Comparing Features: All-in-One vs. Split System

Feature	All-in-One ESS	Split System
Ease of Installation	Pre-integrated, faster setup	Complex wiring, longer installation time
Design & Space Efficiency	Sleek, compact, vertical stack design	Requires wall space and careful layout
Modularity	Plug-and-play expansion modules	Depends on compatibility between components
Maintenance	Centralised system, easier to service	More troubleshooting required
Compatibility	Limited to manufacturer’s ecosystem	Mix-and-match components possible
Monitoring	Unified app and display (e.g., LCD + Bluetooth)	Multiple apps or monitoring platforms
Cost	Slightly higher upfront cost	Can be cheaper if components are sourced well
Aesthetics	Cleaner, modern look	Utility-style look with visible cabling

Why Choose an All-in-One System?

Easy & Fast Installation

All-in-one units like the Sofar PowerAll come pre-configured. Installers simply mount, connect PV, battery, and grid, no need for messy on-site integration.

Compact & Modular

With a small footprint and stackable design, Sofar PowerAll supports up to 30.72kWh of battery capacity without eating up your garage or wall space.

High Performance

Sofar PowerAll offers:

• Dual MPPTs
• 97.8% inverter efficiency
• Fast switch-over (<10ms) during blackouts
• Low self-consumption in sleep mode

These features ensure maximum power utilisation with minimal waste.

Unified Monitoring

Sofar includes LCD + Bluetooth + Wi-Fi App for real-time tracking of battery state, solar generation, and energy flow.

Safety & Compliance

Certified to AS/NZS 4777 and international battery/inverter standards, with IP65 protection for outdoor use.

When a Split System Makes More Sense

Despite the many advantages of all-in-one systems, split setups still have their place, particularly if:

• You already have a solar inverter and want to retrofit a battery
• You prefer maximum control over each component
• You’re managing commercial or multi-inverter sites
• You’re budget-conscious and prefer sourcing parts over time

For example, the Swatten Stackable Battery offers 9.6kWh or 12.8kWh capacities and is compatible with many inverters, ideal for flexible expansion or projects with custom layouts.

Use Case Scenarios

Scenario	Recommended System
New solar + battery install	All-in-One
Small home with space constraints	All-in-One
Budget retrofit to existing inverter	Split System
Commercial warehouse w/ custom layout	Split System
User prefers seamless monitoring & app	All-in-One
DIY system component selection	Split System

Final Thoughts: Which Should You Choose?

Both systems work, but All-in-One wins when it comes to simplicity, speed, and long-term performance.

If you’re planning a new solar + storage system, value a clean design, and want peace of mind from an integrated backup system, Sofar PowerAll is the smarter investment.

If you’re looking for flexibility, component-level upgrades, or are working with an existing system, a split setup offers versatility, but may require more work and support.

Need help choosing? Contact Solar Rains or visit our Solar Battery Collection to get started.

FAQs: All-in-One vs Split ESS