The cost of a product is often the most important piece of information for a potential customer. When it comes to the Sigenergy SigenStor, the price isn’t so straightforward.
The SigenStor is modular. The components stack up like LEGO toy blocks. There are a variety of options to mix and match in this home energy system. Each combination has a different setup and a different price tag.
If that sounds like a frustrating answer, we understand.
At PSC Energy, we’re upping the ante for solar in Sydney. The Sigenergy SigenStor inverter/battery/EV charger combination is the newest addition to our product lineup. We’re here to guide you through the process of choosing right combination so it’s as streamlined as possible for you.
In this article, you’ll learn about the following:
- Understanding Single-phase and Three-phase Connections
- Understanding AC-coupling and DC-coupling
- How Much Does the SigenStor Cost When Installed at a Single-phase Site?
- How Much Does the SigenStor Cost When Installed at a Three-phase Site?
- How Much Does SigenStor Cost When AC-coupled (Just the Battery)?
- FAQ: Sigenergy SigenStor Price
By the end of this article, you’ll know how much different combinations of the SigenStor cost and how they can be customised for your unique energy needs and goals.
Understanding Single-phase and Three-phase Connections
Single-phase and three-phase power are two methods of electrical distribution for your solar system.
We’re writing about this because the SigenStor has an in-built inverter that comes in single-phase or three-phase options. We install both of them.
Single-Phase Power: Single-phase power uses just one active wire and one neutral wire in Australia. It’s more than enough for running everyday appliances like lights, TVs, and refrigerators.
However, it has limitations when it comes to handling high-powered devices like large air conditioners, industrial machinery, or heavy-duty ovens.
Three-Phase Power: Three-phase power, on the other hand, uses three active wires along with a neutral wire.
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.
This setup is ideal for homes with high energy needs or businesses running heavy equipment.
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?
Understanding AC-coupling and DC-coupling
The Sigenergy SigenStor is a highly adaptable home battery system that allows homeowners to integrate solar power through either DC or AC coupling. This flexibility makes it ideal for both new installations and retrofitting existing solar setups.
Whether it’s installed as DC-coupled or AC-coupled affects the price of the system. We install it both ways.
DC Coupling: Maximising Efficiency
DC coupling connects solar panels directly to the battery. This setup minimises energy conversion losses by allowing solar power to be stored in the battery without first converting it to AC power. Something other hybrid inverters have to do.
With SigenStor, when power is needed, the inverter then converts the stored DC energy to AC for household use. DC coupling is the best option for those installing both solar panels and a battery at the same time because it improves efficiency and energy retention.
The SigenStor is exceptional value when bundled with solar panels and DC-coupled.
AC Coupling: Easy Retrofitting
SigenStor, when AC-coupled, can be fit onto any existing solar system. It’s brand-agnostic when installed this way.
When you AC-couple the SigenStor, you bypass the extra features and turn it into a battery only. You can still opt for the car charger, but it will be AC-coupled with slower charging speeds.
AC coupling integrates the SigenStor with existing solar inverters or microinverters. The solar panels generate DC electricity, which is converted to AC by the existing inverter or microinverter.
However, all batteries store energy in DC form only, it’s a restriction of the technology. The excess AC energy generated by solar can be stored in the SigenStor battery once it’s converted back to DC energy.
When needed, the battery converts its stored energy back to AC power.
While this setup is slightly less efficient due to multiple conversions, it allows seamless battery integration without replacing existing solar inverters or microinverters.
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.
Ready to go solar? Click here.
How Much Does the SigenStor Cost When Installed at a Single-phase Site?
At PSC, we’re offering two inverter sizes for single-phase installations. You can opt for a 6kW or a 10kW version.
Please Note: Because every one of our systems is customised to each customer, we can’t really narrow the exact price down for you in this article. We can, however, offer a range.
We also pair these inverters with solar battery storage in increments of 8kWh. While it’s available in 5kWh modules, we feel that this is too little storage for households.
The battery storage scales up by 8kWh increments into 16kWh and 24kWh. We start out SigenStor stacks at 16 kWh, it’s a better battery size than 8 kWh for our customers.
Therefore, the cost for the system with solar panels will be $21,260 (9 panels + 16 kWh).
If you’re interested in learning a bit more about solar and battery rebates in NSW, Australia, you might want to check out the following article titled, Ultimate Guide to Australia’s 2025 Solar Rebate and Battery Rebate: Federal and NSW Rebate for Solar.
How Much Does the SigenStor Cost When Installed at a Three-phase Site?
At PSC, we’re offering six inverter sizes for three-phase installations. You can opt for a 5kW, 10kW, 15kW, 20kW, 25kW or a 30kW version depending on how many panels are up on the roof.
It bears repeating: Because every one of our systems is customised to each customer, we can’t really narrow the exact price down for you in this article. We can, however, offer a range.
Like single-phase installations, we also pair these inverters with solar battery storage in increments of 8kWh.
The battery storage scales up by 16kWh increments up to 48kWh.
Therefore, the cost will be $21,428 (9 panels + 16kWh).
If you’d like to know more about the battery rebate, you might want to check out the following article titled, FAQ: The NSW Battery Rebate is Here – What You Need to Know.
Power up your savings. Click here.
How Much Does SigenStor Cost When AC-coupled (Just the Battery)?
Finally, if you need the SigenStor installed as an AC-coupled option, the price is more or less fixed. It will still scale up as the storage increases, but because it isn’t paired with panels, you can expect modular increments for the battery.
You’ll be AC coupling this battery if you have an existing solar system. It can be a string system or an Enphase microinverter system, but the battery will need to be AC-coupled.
AC-coupled SigenStor Single-phase: $14,405 (16 kWh)
AC-coupled SigenStor Three-phase: $14,704 (16 kWh)
A single battery module sold separately costs $2,950 upfront.
If you’re interested in learning a bit more about the battery market, you might want to check out the following article titled, Best Home Solar Batteries for 2025.
Wrapping Things Up: Is SigenStor for You?
The cost of SigenStor depends on your home’s energy needs, but its modular design, built-in inverter, and advanced energy management make it a smart long-term investment.
Unlike fixed-capacity battery systems, SigenStor allows you to start small and expand storage as needed, ensuring you only pay for what you use.
At PSC Energy, we’re helping customers lower their energy bills, protect their homes against blackouts, and future-proof their energy systems. SigenStor is designed to increase savings and energy independence, making it a valuable choice for homeowners looking to take control of their power.
If you’re interested in learning a bit more about the solar battery rebate, you might want to check out the following article titled, Everything You Need to Know About the Home Battery Rebate for NSW.
FAQ: Sigenergy SigenStor Price
Why isn’t there a single fixed price for the SigenStor?
The SigenStor doesn’t have a fixed price because it’s modular. You can stack different components based on your home’s energy needs. The inverter size, battery capacity, coupling type, and whether you add solar panels all change the final price. Each installation is customised, so the cost varies.
What’s the difference between single-phase and three-phase, and does it affect the price?
Yes, it changes both the setup and the price. Single-phase power uses one active wire and is common in most Australian homes. Three-phase uses three active wires and is better for bigger homes or heavy energy use, like EV chargers or ducted air conditioning. The SigenStor’s built-in inverter comes in both types, and PSC can install either one.
What’s the difference between DC-coupling and AC-coupling?
With DC-coupling, your solar panels connect straight to the battery, so less energy is lost during conversion. This is the most efficient setup and is best if you’re installing both panels and a battery together.
AC-coupling is best if you already have solar panels. The SigenStor can work with your current inverter or microinverters, so you don’t need to replace anything. It’s a bit less efficient because of extra conversion steps, but it’s easy to add to almost any existing system.
How much does the SigenStor cost for a single-phase installation with solar panels?
For single-phase homes, PSC offers a 6kW or 10kW inverter. Battery storage starts at 16kWh, which is their recommended minimum, and can be increased in 8kWh steps up to 24kWh. A typical setup with 9 panels and 16kWh storage costs about $21,260.
How much does the SigenStor cost for a three-phase installation with solar panels?
Three-phase homes have more inverter choices: 5kW, 10kW, 15kW, 20kW, 25kW, or 30kW, depending on your solar array size. Battery storage can go up to 48kWh in 16kWh steps. A similar starting system with 9 panels and 16kWh storage costs about $21,428.
How much does the SigenStor cost as a battery-only AC-coupled installation?
If you already have solar panels and only want to add the SigenStor battery, the price is easier to predict because you’re not including new panels.
A 16kWh AC-coupled system costs about $14,405 for a single-phase home and around $14,704 for a three-phase home. If you want more storage later, extra 8kWh battery modules are $2,950 each.
What’s the minimum battery size PSC will install?
The SigenStor comes in 5kWh modules, but PSC starts installations at 16kWh. They’ve found that while 8kWh can work, 16kWh is a much better fit for most households’ daily needs.
Can the SigenStor work with my existing Enphase microinverter system?
Yes. When set up with AC-coupling, the SigenStor works with any brand, including Enphase microinverters or standard string inverters.
Are there any rebates available that could bring the price down?
Yes, there are federal and NSW state rebates for eligible solar and battery installations. PSC has articles about the 2025 solar rebate and the NSW battery rebate, which are helpful to read before choosing your system size.
