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, 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)?
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.
Therefore, the cost for the system with solar panels will be in a range from around $13,000 (9 panels + 8kWh) – around $23,500 (40 panels + 24kWh).
With financing through Plenti Green Loans, the deposit will range from around $1,300 – $2,350. The monthly payments will range from around $200 – around $350.
If you’d like to learn a bit more about problems with the NSW battery rebate, you might want to check out the following article titled, Are You Eligible for the NSW Battery Rebate? Problems and Considerations.
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 8kWh increments up to 48kWh.
Therefore, the cost will be between about $16,000 (9 panels + 8kWh) – around $63,000 (99 panels + 48kWh).
With financing through Plenti Green Loans, the deposit will range from around $1,600 – around $6,300. The monthly payments will be about from $250 – $950.
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: $9,990 (8kWh) – $29,500 (48kWh)
With financing through Plenti Green Loans, the deposit will range from $999 – $2,950. The monthly payments will range from $250 – $738.
AC-coupled SigenStor Three-phase: $11,990 (8kWh) – $39,990 (48kWh)
With financing through Plenti Green Loans, the deposit will range from $1,199 – $3,999. The monthly payments will range from $300 – $1,000.
A single battery module sold separately costs $4,990 upfront. $499 with financing through Plenti and $125 payments.
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, 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.
