Sigenergy’s new solar battery, the SigenStor, is making waves in the solar industry. It’s currently our top performing product. But will it work for you and your home? Will it actually save you money long term?
At PSC Energy, we design and install solar battery energy systems across NSW every week. We work with Sigenergy solar batteries, so we see the strengths and trade-offs up close. We know what pays back and what just sounds good.
In this article, you will learn the following:
- What Is the Sigenergy SigenStor?
- How Does the Sigenergy Solar Battery Compare to Powerwall 3 and Enphase IQ Battery 5P?
- What Affects ROI with the Sigenergy Solar Battery?
- Is the Sigenergy Solar Battery the Right Fit?
- FAQ: Sigenergy and ROI
By the end of this article, you’ll have a clear yes or no for your home and the next steps to take.
What Is the Sigenergy SigenStor?
SigenStor is a modular solar battery. Each battery block stores 8 kWh. You can stack up to six blocks on one inverter for 48 kWh in a single tower. Larger homes can link multiple towers for more storage.
It is an all-in-one system. The stack combines a hybrid inverter with the battery modules. You can add an optional EV charger to the same stack. This setup reduces wall clutter and makes installation simpler.
You can choose single-phase or three-phase backup depending on how your house connects to the grid. Larger homes are often three-phase sites.
SigenStor can back up all three phases during a blackout. This helps homes with heavy appliances, large air conditioners, or EV chargers keep running.
The battery uses lithium iron phosphate (LFP) chemistry. LFP is stable and has a long service life. Built-in protections include:
- Temperature monitoring.
- Surge protection.
- An internal fire extinguisher.
The warranty lasts 10 years. Sigenergy guarantees at least 70% of the original capacity at the end of the warranty period.
If you’d like to learn a bit more about the cost of SigenStor, we recommend you check out the following article titled, How Much Does the Sigenergy SigenStor Cost?
How Does the Sigenergy Solar Battery Compare to Powerwall 3 and Enphase IQ Battery 5P?
Tesla Powerwall 3
Tesla’s battery is the most familiar name in home storage. It stores 13.5 kWh in a single unit and includes its own inverter. It works best on a single-phase house. If your home has a three-phase connection, it will back up only one phase. The appeal is brand trust and storage capacity.
- Storage: 13.5 kWh per unit.
- Inverter: built in.
- Phases: single-phase only; backs up one phase on three-phase homes.
- Warranty: 10 years.
- Best for: homeowners who want a well-known brand and a tidy, simple system.
Enphase IQ Battery 5P
The Enphase IQ Battery 5P suits homes already using Enphase microinverters. Each unit stores about 5 kWh, and you can install up to 8 units together per system controller.
The battery has no single point of failure because each unit contains six microinverters. If one fails, the rest keep working. Enphase also gives you detailed monitoring down to each panel.
- Storage: ~5 kWh per unit.
- Reliability: six microinverters per battery for redundancy.
- Monitoring: panel-level insights in the app.
- Warranty: 15 years.
- Best for: Enphase households that want granular data and scalable capacity.
Sigenergy SigenStor
SigenStor sits between Tesla and Enphase. It is modular like Enphase but uses smaller blocks. It stacks the inverter, the battery modules, and an optional EV charger in one tower.
It supports three-phase backup, which helps larger homes keep heavy loads running. It does not offer panel-level monitoring or a 15-year warranty, but it adds intelligent control through the mySigen app.
- Design: modular blocks with an all-in-one stack.
- Extras: optional EV charger in the same tower.
- Phases: true three-phase backup support.
- Software: mySigen app uses AI to learn usage, watch tariffs, and optimise charge and discharge.
- Trade-offs: no panel-level monitoring and a shorter warranty than Enphase.
- Best for: homes that want three-phase backup and a clean, integrated stack.
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.
What Affects ROI with the Sigenergy Solar Battery?
A battery improves your ROI by storing your daytime solar and letting you use it later when grid power is expensive.
Without a battery, you export surplus solar to the grid. In NSW, you get $0.05 – 0.08 per kWh for that power. When you buy electricity back in the evening, it costs $0.30 – 0.45 cents per kWh. That price gap is where the savings come from.
The more solar energy you can store and use during those expensive evening hours, the faster the battery pays for itself.
Here are a few things that will affect your solar battery’s ROI:
When you use power.
Households that use more power in the evenings see the best results. If you’re home all day and already consume your solar as it’s produced, the battery has less value.
How much power you use.
High-usage homes with pool pumps, ducted air conditioning, or EV charging benefit more. The more energy you need at night, the more useful a battery becomes.
The size of your solar system.
A 10 kW system or larger will usually generate enough surplus to charge a battery daily. Smaller solar systems may not keep the battery full, which slows the payback period.
Backup power value.
The financial return is only part of the story. If you live in an area with frequent blackouts or rely on critical appliances, backup power adds real value. The SigenStor’s ability to back up all three phases makes it especially useful here.
Battery lifespan and warranty.
The SigenStor has a 10-year warranty. Most households should aim to recover their investment well within that timeframe. The battery will continue to run after ten years, but its usable capacity will gradually decline.
Government rebates.
The 2025 federal battery rebate offers a significant discount off your purchase price. This reduces the payback time significantly. On January 1st, the value of the rebate drops to about 30% off the price of an eligible battery. This will continue to slowly decrease until 2030.
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.
Is the Sigenergy Solar Battery the Right Fit?
Good fit:
The SigenStor suits households that plan to stay in the home for at least ten years.
- It suits homes that use more energy in the evenings than during the day.
- It provides strong blackout protection, including true three-phase backup.
- It fits homes with medium to high overall energy use.
- It works well for new installs that want an integrated stack.
- It allows future expansion if your storage needs grow.
Bad fit:
The SigenStor is not ideal for households with very low energy needs.
- It may not fit homes that already use most of their solar during the day.
- It does not offer the longest warranty available.
- It is unlikely to be the lowest upfront price on the market.
If you’d like to learn a bit more about Sigenergy’s SigenStor, you might want to check out the following article titled, Pros and Cons of the Sigenergy SigenStor Solar Battery and Energy System.
Cash Flow with Sigenergy: Rays Become Pays
The Sigenergy SigenStor is a flexible and capable battery system. Its modular design, three-phase support, and AI-powered management make it stand out in the market. The warranty is standard at ten years, so homeowners should plan for the system to pay for itself within that window.
With federal and state rebates, high-use homes can often see payback in under a decade. Lower-use households may see slower returns, but even then, the SigenStor offers more than just bill savings. It provides energy security, blackout protection, and the ability to grow with your needs.
At PSC Energy, we believe in the Sigenergy solar battery, which is why we install it. For many homes in NSW, the SigenStor is more than a battery. It makes it a complete home energy system. Give us a call, and we’ll put together a free Sigenergy battery quote for you.
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.
FAQ: Sigenergy and ROI
What is the Sigenergy SigenStor solar battery?
The Sigenergy SigenStor is a modular solar battery system that combines a hybrid inverter, stackable battery modules, and an optional EV charger into one tower. Each module stores 8 kWh, and up to six can be stacked for 48 kWh per system. It is available in both single-phase and three-phase versions. It is one of the few residential batteries in Australia that can provide true three-phase backup during blackouts.
How much energy storage does the Sigenergy battery provide?
Each SigenStor battery module stores 8 kWh. You can stack up to six modules per inverter for 48 kWh in one tower. For larger homes or businesses, multiple towers can be linked together for even greater storage capacity.
What makes the Sigenergy battery different from other solar batteries?
The SigenStor is an all-in-one system that integrates the inverter, batteries, and optional EV charging into one stack. It offers true three-phase backup, which most other residential batteries cannot provide. It also includes advanced safety features such as temperature monitoring, surge protection, and an internal fire extinguisher. The mySigen app uses AI to optimise charging and discharging based on your household patterns and electricity tariffs.
How does the Sigenergy SigenStor compare to the Tesla Powerwall 3?
The Tesla Powerwall 3 has a fixed capacity of 13.5 kWh, includes its own inverter, and is single-phase only. It comes with a 10-year warranty and is widely supported in Australia. The SigenStor, by contrast, is modular, supports both single-phase and three-phase backup, and can be scaled from 8 kWh to 48 kWh per tower. Both have a 10-year warranty, but the SigenStor offers more flexibility and blackout coverage.
How does the Sigenergy SigenStor compare to the Enphase IQ Battery 5P?
The Enphase IQ Battery 5P provides 5 kWh per unit. It uses microinverters, so there is no single point of failure, and it offers detailed panel-level monitoring. Enphase also provides a 15-year warranty, which is longer than SigenStor’s 10 years. The SigenStor, however, integrates the inverter and batteries into one stack and supports three-phase backup, which the Enphase system does not yet offer.
How does a solar battery like the Sigenergy SigenStor save money?
The SigenStor stores surplus solar power generated during the day. Instead of exporting that power to the grid for 5–8 cents per kWh, you can use it in the evening when electricity costs 30–45 cents per kWh. The price difference between export and import rates is where the savings come from. By using more of your own solar power during peak grid prices, you reduce your bills and improve your ROI.
What factors affect the ROI of the Sigenergy SigenStor?
Key factors include when you use power, how much power you use, the size of your solar system, whether you value blackout protection, and how long you plan to stay in your home. Government rebates also play a significant role, as they reduce upfront costs and shorten payback times.
How long is the warranty on the Sigenergy SigenStor?
The Sigenergy SigenStor comes with a 10-year warranty. Sigenergy guarantees that the battery will retain at least 70% of its original capacity by the end of the warranty period.
Are there rebates available for the Sigenergy SigenStor?
The federal rebate provides about $350 per kWh of storage, roughly 35% off most systems in 2025.
Who is the Sigenergy SigenStor best suited for?
The SigenStor is best for households that plan to stay in their home for at least ten years, use more power in the evenings, want strong blackout protection, and have medium to high energy use overall. It is also a strong choice for three-phase homes and new solar installations that benefit from the all-in-one design.
