Sigenergy Battery FAQs: What Every Homeowner Should Know
Sigenergy’s SigenStor is a next-generation modular battery system built for Australian homes. It’s compatible with new and existing solar, offers flexible backup power, supports future EV integration, and is backed by solid warranties and strong industry support. The article below answer the most commonly asked questions we have had about the product.
With the federal battery rebate in full swing, a lot of homeowners are looking into Sigenergy batteries. This article addresses the most commonly asked questions we get asked.
1. What is the Sigenergy Gateway and what’s the warranty like?
The Sigenergy gateway is a small enclosure that sits beside the battery, managing your circuits and backup power. It acts as the brain of your energy system—seamlessly switching your power between solar, grid, and battery during outages. Originally, it came with a 2-year warranty, but it’s now standard with a 5-year warranty, and you can upgrade to 10 years for a small fee.
This change reflects feedback from installers and shows Sigenergy’s commitment to improving their product offering over time. It’s available in both single-phase and three-phase models, giving flexibility for homes and small businesses alike.
2. Do the cables have to be bottom entry in the Gateway?
Some people did not like the look of the Gateway with the cables coming in from the bottom. The latest gateway model allows both bottom and rear cable entry, offering a much cleaner finish and greater flexibility for different installation types. The unit now includes a matching shroud that hides the cables, resulting in a sleek, clutter-free look that rivals Tesla’s minimalist aesthetic.
Installers now have two options: traditional bottom entry with a protective cover, or fully concealed rear entry—ideal for homeowners who value design and integration into the home’s visual style.
3. Is the cover on the battery stack durable enough for outdoor use?
The SigenStor battery system is IP65 rated—meaning it’s fully weather-resistant and well suited to outdoor Australian conditions. The aesthetic cover wraps around the unit and protects it from the elements, much like a phone case protects your device from knocks and scratches.
Like any outdoor product, long-term exposure to sun and weather may cause some cosmetic fading over the years. However, the core functionality should remain unaffected. At GI Energy, we always try to install the battery in a sheltered location, such as under an eave or on a shaded wall, or preferably inside a garage, to preserve aesthetics and longevity.
4. How long has Sigenergy been in business, and can I trust them?
Sigenergy is a relatively new company, but their impact on the energy industry has been substantial. In their first two years, they generated over $200 million in revenue and now hold the largest market share for modular batteries in Australia.
The founding team consists of energy veterans from leading inverter companies. Their components are well-engineered and their proprietary software platform gives them an edge in user experience and system intelligence—making it feel like an “iPhone moment” in home battery tech.
The fact they are a newer company is a valid concern but due to their rapid growth and innovative product, it has not stoped us installing them.
5. Can Sigenergy support vehicle-to-grid (V2G) and vehicle-to-home (V2H) technology?
Yes—Sigenergy is V2G and V2H ready, even if your current EV doesn’t yet support these technologies. The system includes built-in hardware to support bidirectional charging, and you can add a DC charger later when your EV is compatible.
Think of it like buying an HD-ready TV before HD content was widespread—you’re future-proofing your investment by choosing a system that’s already ready for the next evolution of home energy.
6. Why does the system include a DC-to-DC converter?
The DC-to-DC converter enables Sigenergy battery modules to work in parallel, not just series. This allows you to mix and match different battery capacities (e.g. 5kWh and 8kWh) in the same stack, which most systems cannot do.
This is a major benefit when expanding your system down the line. If newer battery modules are released or your energy needs change, you won’t have to start over—you can simply add on to your existing setup. It also means the newer module will operate at their brand new efficiency, whereas in series they would be dragged down to the efficiency of the older modules.
7. What is Sigenergy’s aftersales support like?
Support is improving rapidly. With surging demand following the 2025 battery rebate, Sigenergy has expanded its local support team, including onsite technicians and remote support through Australian distributors.
There’s also AI built into the system that helps diagnose issues in real time and often prevents service visits altogether. While no brand is perfect, Sigenergy is investing heavily in support and training. As with any company growing this fast there will be growing pains in this department but the early signs are that they do care about growing this team and improving it for consumers.
8. What is the warranty for Sigenergy batteries?
The SigenStor battery comes with a 10-year product warranty and a guarantee of 70% usable capacity after 10 years—which places it in the same class as premium battery brands like Tesla and BYD.
The gateway, which handles power distribution and backup switching, now includes a 5-year warranty, with a 10-year option available. These warranties ensure that your investment is well protected for the long haul.
Key Specs Comparison
| Feature | Sigenergy SigenStor | Tesla Powerwall 3 | BYD HVM | BYD HVS | Sungrow SBH | Sungrow SBS |
|---|---|---|---|---|---|---|
| Modularity | Stackable (5–48kWh) per stack | Single 13.5kWh unit | Yes (2.76kWh) | Yes (2.56kWh) | Yes (5kWh) | Yes (3.2kWh) |
| Backup Power | Up to 30kW | 5kW | Inverter Dependant | Inverter Dependant | Inverter Dependant | Inverter Dependant |
| Chemistry | LFP | LFP | LFP | LFP | LFP | LFP |
| EV Charger | Built-in (optional purchase) | Not included | Not included | Not included | Optional | Optional |
| V2G Ready | Yes | No | No | No | No | No |
Summary: Should You Buy a Sigenergy Battery in 2025?
If you’re after a battery that’s:
- Fully modular and expandable
- Backup-ready for blackouts
- V2G/V2H-ready for future EV charging
- Designed with aesthetics and space-efficiency in mind
- Eligible for the generous 2025 Battery Rebate
- You are not put off by the fact they are a newer company
…then Sigenergy should be on your shortlist.
Other FAQs: Quick Answers
Can Sigenergy be used with existing solar systems? Yes. It works with both new installs and retrofits using AC coupling.
Is the battery outdoor rated? Yes. It’s IP65 rated and designed for the diverse Australian climate.
Can I add batteries later? Yes. You can add more 5kWh or 8kWh modules anytime with minimal disruption.
Is vehicle-to-home supported today? The hardware is included—once EVs and regulations catch up, you’re ready.
Does GI Energy install Sigenergy systems? Yes. We’re one of the leading Sigenergy partners in Australia.
About GI Energy GI Energy is an award-winning solar and battery company, proudly helping Australian homeowners since 2011. We focus on quality products, exceptional aftercare, and long-term energy planning you can trust.
Written by Daniel McCabe, founder and strategist at GI Energy. With over 16 years in the energy industry — from procurement to solar and holistic energy management — Daniel is focused on helping Australians take a balanced, long-term approach to their energy needs. His insights combine real-world experience with a strong belief in intelligent, ongoing support — not just one-off solar installs.
