How Much Does the Sigenergy SigenStor Cost?

Updated on April 2, 2026

Home energy system prices can be tricky to figure out, and the Sigenergy SigenStor is no different. Since it’s modular, the cost depends on your home size, current setup, and what you want from it. It’s not an excuse, just how it works. That’s why you deserve a clear explanation instead of a vague “it depends.”

At PSC Energy, we install the SigenStor across Sydney and beyond. We made this guide to give you clear examples of what different SigenStor setups cost. All prices include installation, equipment, and GST, so you know exactly what you’re investing. No hidden fees, just straightforward info on what you’ll pay for different setups.

In this article, you’ll learn the following:

• Why the Sigenergy SigenStor Price Isn’t One-Size-Fits-All
• Single-Phase vs Three-Phase: What You Need to Know
• DC-Coupling vs AC-Coupling: What’s the Difference?
• SigenStor Pricing: Single-Phase Installations
• SigenStor Pricing: Three-Phase Installations
• SigenStor Pricing: AC-Coupled (Battery Only) Installations
• FAQ: Sigenergy SigenStor Pricing

By the end of this article, you’ll know:

• The difference between single-phase and three-phase power and why it matters for pricing.
• How DC-coupling and AC-coupling affect the cost.
• What you’ll pay for a single-phase SigenStor system.
• What you’ll pay for a three-phase SigenStor system.
• What you’ll pay if you’re adding the SigenStor as a battery to your existing solar setup.
• How the SigenStor compares to other batteries on the market.
• Answers to the most common questions about SigenStor pricing.

Why the Sigenergy SigenStor Price Isn’t One-Size-Fits-All

The SigenStor isn’t a single product with a fixed price. It’s a modular home energy system made of parts you can combine to fit your home’s needs.

Think of it like buying a computer; you pick the processor, RAM, and storage, and the price changes based on your choices.

The SigenStor works the same way. Its core components are:

• A hybrid inverter, available in multiple output sizes.
• A battery, which scales up in 8kWh increments.
• An optional EV charger.

On top of that, two other factors shape the final cost:

• Whether your home runs on single-phase or three-phase power.
• Whether the system is DC-coupled or AC-coupled.

Both affect which components you need and how they’re installed. We’ll explain each in detail below.

The great thing about this modular design is you only pay for what you need, and you can add more later as your energy use grows.

Adding battery storage is easy, you just add extra modules when you want more capacity. Usually, your installer can do this quickly with little or no downtime, so your power keeps running while you upgrade.

If you’d like to learn a bit more about SigenStor, a solar battery we carry, we recommend you check out the following article titled, Sigenergy SigenStor Review.

Single-Phase vs Three-Phase: What You Need to Know

Before you can understand SigenStor pricing, you need to know which type of power connection your home has. This determines which inverter options are available to you.

Single-phase power uses one active wire and one neutral wire. It’s the most common setup in Australian homes. Key things to know about single-phase power:

• It’s the standard connection type for many suburban Australian homes.
• It handles everyday appliances like lights, fridges, and TVs without any issues.
• It struggles with high-powered devices like large ducted air conditioners or EV chargers.

Three-phase power uses three active wires and a neutral wire. Instead of one power wave, it delivers three overlapping waves, creating a more stable and consistent energy supply. Key things to know about three-phase power:

• It’s common in newer homes, larger homes, and most businesses.
• It handles heavy equipment and high energy demands with ease.
• It supports faster EV charging and larger solar systems.

Instead of a single power wave like in single-phase, three-phase power has three overlapping waves, ensuring a more consistent and stable energy supply.

Not sure which one you have? Here’s how to check:

• Look at your switchboard. A single-phase switchboard has one main switch; a three-phase switchboard has three.
• Check your electricity bill, which will sometimes list your connection type.
• Ask your solar installer for a site assessment.

Why does this matter for SigenStor pricing? The SigenStor has a built-in inverter that comes in different sizes depending on your connection type:

• Single-phase installations: 6kW or 10kW inverter options.
• Three-phase installations: 5kW, 10kW, 15kW, 20kW, 25kW, or 30kW inverter options.

The three-phase inverter range is wider because three-phase homes and businesses tend to have larger energy needs and more solar panels on the roof. More panels require a larger inverter to handle the output.

If you’re interested in learning a bit more about single-phase and three-phase sites, you might want to check out the following article titled, Single-Phase vs. Three-Phase: How Are They Different?

DC-Coupling vs AC-Coupling: What’s the Difference?

The second factor that affects your SigenStor price is how the battery connects to your solar system. There are two ways: DC-coupled and AC-coupled. Which one fits you depends on whether you already have solar panels installed.

DC-coupling connects the solar panels directly to the SigenStor battery. Here’s what that means in practice:

• Solar energy flows straight from the panels into the battery without being converted first.
• This reduces energy loss because fewer conversions happen along the way.
• It’s the most efficient way to store solar energy.
• It’s the best option if you’re installing solar panels and a battery at the same time.
• The SigenStor’s built-in inverter handles the conversion from DC to AC when your home needs power.

AC-coupling connects the SigenStor to an existing solar system. Here’s what that means in practice:

• Your existing inverter or microinverter stays in place, so you don’t need to replace it.
• The SigenStor works alongside your current setup, regardless of the brand.
• It’s slightly less efficient than DC-coupling because the energy goes through more conversions before it’s stored.
• It’s the right option if you already have solar and just want to add battery storage.
• You can still add an EV charger, but it will charge at AC speeds rather than DC speeds.

How does this affect the price? DC-coupled systems include solar panels, a hybrid inverter, and a battery, so they cost more upfront. AC-coupled systems are battery-only, making pricing simpler. We’ll explain the exact costs for each below.

If you’re interested in learning about types of solar batteries, you might want to check out the following article titled, AC-coupled Battery vs. DC-coupled Solar Batteries.

SigenStor Pricing: Single-Phase Installations

If your home runs on single-phase power and you’re installing solar panels alongside the SigenStor, here’s what you need to know.

At PSC Energy, we offer two inverter sizes for single-phase installations:

• 6kW inverter: suited to smaller homes with lower energy consumption.
• 10kW inverter: suited to larger homes or homes with higher energy demands.

We pair these inverters with battery storage that increases in 8kWh steps. Although the SigenStor battery comes in 5kWh modules, we start with stacks of 16kWh. Here’s why:

• 8kWh is too little storage for most households to make a meaningful difference to their energy bills.
• 16kWh gives you enough capacity to cover overnight usage and get through low-production days.
• Storage scales up to 24kWh if your energy needs are higher.

For a single-phase installation with 9 panels and 16kWh of battery storage, the installed price starts at $21,260.

Keep in mind this price can change based on:

• The inverter size you choose.
• How many solar panels you install.
• Whether you add an EV charger to the system.
• The specifics of your roof and switchboard.

Since every system is tailored to your home, we don’t have a fixed price list. But the number above gives you a good starting point for your budget.

If you’d like to learn a bit more about SigenStor from Sigenergy, you might want to check out the following article titled, Sigenergy SigenStor Quietly Becomes Australia’s Top Solar Battery Brand.

SigenStor Pricing: Three-Phase Installations

If your home or business runs on three-phase power and you’re installing solar panels alongside the SigenStor, here’s what you need to know.

At PSC Energy, we offer six inverter sizes for three-phase installations:

• 5kW: suited to smaller three-phase homes with modest energy needs.
• 10kW: suited to medium-sized homes with moderate solar generation.
• 15kW: suited to larger homes or small businesses.
• 20kW: suited to homes or businesses with high energy consumption.
• 25kW: suited to large commercial or residential setups with significant solar arrays.
• 30kW: suited to the largest installations with maximum solar output.

Like single-phase installations, we pair these inverters with battery storage that scales in 8kWh increments, from 16kWh to 48kWh.

The wider battery range reflects the fact that three-phase properties tend to consume more energy and benefit from greater storage capacity.

For a three-phase installation with 9 panels and 16kWh of battery storage, the installed price starts at $21,428.

Keep in mind this figure will change depending on:

• The inverter size you choose.
• How many solar panels do you install.
• Whether you add an EV charger to the system.
• The specifics of your property and switchboard.

The starting price for three-phase setups is close to single-phase, but costs increase faster as you choose bigger inverters and more battery capacity for larger properties.

If you’d like to learn about some of the potential downsides to the SigenStor energy system, you might want to check out the following article titled, Problems with Sigenergy SigenStor Solar Energy System.

SigenStor Pricing: AC-Coupled (Battery Only) Installations

If you already have solar panels installed and you just want to add battery storage, this is the section for you. The SigenStor can connect to any existing solar system, whether it’s a string inverter setup or an Enphase microinverter system.

Because you’re not paying for a new inverter or solar panels, AC-coupled pricing is more straightforward. The cost scales with the amount of battery storage you choose, starting at 16kWh. Here’s what you can expect to pay for a 16kWh AC-coupled installation:

• Single-phase AC-coupled SigenStor: $14,405
• Three-phase AC-coupled SigenStor: $14,704

If you want more than 16kWh of storage, you can add extra battery modules. Each 8kWh module costs $2,950 upfront. So, to go up to 24kWh, you’d add $2,950 to the prices above.

Here are a few things to know about AC-coupled installations:

The small drop in efficiency compared to DC-coupling is usually worth it if you already have a working solar system, since you don’t need to replace your current equipment.

Your existing inverter or microinverter stays in place, so you don’t need to replace any of your current solar equipment.

The SigenStor works with any brand of existing solar system.

You can still add an EV charger, but it will charge at AC speeds rather than the faster DC speeds available in a full SigenStor installation.

Wrapping Up: Sigen, Sealed, Delivered

The SigenStor isn’t for everyone, and it’s important to be upfront about that. If you have a small home, use little energy, and don’t plan to get an EV, a simpler, cheaper battery might work just as well.

But if any of the following apply to you, the SigenStor is worth serious consideration:

• You’re installing solar and a battery at the same time and want a single integrated system.
• You have high energy consumption and need a battery that can scale beyond 13.5kWh.
• You own or plan to buy an EV and want fast DC charging built into your energy system.
• You’re on three-phase power and need inverter sizes that most competitors don’t offer.
• You want the flexibility to expand your storage over time without replacing your inverter.

Thanks to its modular design, you’re not stuck with one capacity. You can start with 16kWh and add more storage as your needs or budget change. That kind of flexibility is rare in a single product.

At PSC Energy, we install the SigenStor across Sydney and beyond. Every quote we provide is tailored to your home, energy use, and goals. If you want an exact quote for your property, contact our team. We’ll guide you through your options. It’s what we do.          

If you’re interested in learning more about the Cheaper Home Batteries Program and it’s recent changes, you might want to check out the following article titled, Changes to the Australian Government’s Cheaper Home Batteries Program Explained.

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FAQ: Sigenergy SigenStor Pricing

What is the cheapest SigenStor system?

The most affordable entry point is an AC-coupled single-phase installation with 16kWh of storage, which starts at $14,405. This option suits homeowners who already have a functioning solar system and want to add battery storage without replacing any existing equipment.

Can I add more battery storage to the Sigenergy SigenStor later?

Yes. Each additional 8kWh battery module costs $2,950. You can add modules to your existing stack without replacing the inverter, making the SigenStor one of the more flexible systems on the market for future expansion.

Does the SigenStor work with my existing solar system?

Yes, as long as it’s AC-coupled. The SigenStor is brand-agnostic when installed this way, meaning it works with string inverter systems and Enphase microinverter systems alike.

What is the difference in price for Sigenergy SigenStor between single-phase and three-phase installations?

For a full solar and battery installation with 9 panels and 16kWh of storage, single-phase starts at $21,260 and three-phase starts at $21,428. The gap widens as you scale up the inverter size and battery capacity for larger three-phase properties.

Does the price include installation of the Sigenergy SigenStor?

Yes. All prices quoted in this article are installed prices, including labour, equipment, and commissioning.

Can I charge my EV with the SigenStor?

Yes. The SigenStor includes an optional EV charger. If the system is DC-coupled, you get faster DC charging speeds. If it’s AC-coupled, the EV charger will operate at AC speeds, which are slower but still functional.