Updated on March 20, 2026
Imagine if your electric vehicle could do more than just take you places. What if it could power your home at night, charge itself using your solar panels during the day, and even help you earn money by selling electricity back to the grid?
That’s exactly what bidirectional EV charging promises. And the Sigenergy SigenStor DC EV Charger is one of the first products in Australia that delivers it.
At PSC Energy, we install the SigenStor and help Australian homeowners decide if it suits their energy needs. We’ve guided many through this choice and understand the common questions that come up.
In this article, you’ll learn about the following:
- What Is the Sigenergy SigenStor Bidirectional DC EV Charger?
- What Makes the Sigenergy SigenStor Different from Other EV Chargers?
- How Does the Sigenergy SigenStor Work with Solar Panels?
- What Are the Pros and Cons of the Sigenergy SigenStor?
- FAQ: SigenStor Bidirectional DC EV Charger
By the end of this article, you’ll learn what the Sigenergy SigenStor Bidirectional DC EV Charger is, how it works with solar, what makes it different from a standard charger, and whether it’s worth the investment for your home.
What Is the Sigenergy SigenStor Bidirectional DC EV Charger?
The Sigenergy SigenStor is a 25-kilowatt bidirectional DC EV charger. Let’s explain what that means, since each part is important.
“25-kilowatt” means how fast it charges. A typical AC home charger runs at 7kW, but the SigenStor charges at 25kW, over three times faster.
“DC” means direct current, which is the same electricity your solar panels produce and your EV battery stores. Most home chargers use AC power, so your car must convert it to DC before storing it.
That conversion wastes energy. The SigenStor sends DC power straight to your battery, skipping that step.
“Bidirectional” means electricity can flow both ways. Most chargers only send power into your car. The SigenStor can also pull power back out and use it like this:
- Vehicle-to-Home (V2H): Draw stored energy from your EV to run your home at night when your solar panels aren’t producing.
- Vehicle-to-Grid (V2G): Export stored electricity back to the grid during peak pricing and earn money or bill credits.
- Vehicle-to-Load (V2L): Power appliances directly from your EV, even away from home. Think of it as a giant portable power bank on wheels. It’s great for camping trips.
The SigenStor is part of Sigenergy’s wider home energy system and connects easily with their stackable home battery. It also works on its own if you just have solar and an EV.
If you’re interested in learning a bit more about the Sigenergy Sigen AC EV Charger, you might want to check out the following article titled, Sigenergy Sigen AC EV Charger: Everything You Need to Know.
What Makes the Sigenergy SigenStor Bidirectional EV Charger Different from Other EV Chargers?
Most home EV chargers do just one thing: send electricity to your car. The SigenStor does a lot more.
Charging Speed
At 25kW, the SigenStor charges faster than any standard AC charger for home use. Most Australian homes have a 7kW AC charger. Some premium ones go up to 11kW or 22kW, but the SigenStor’s DC fast charging sends power straight to your battery without losing speed to conversions.
Bidirectional Functionality
No regular home charger supports V2H, V2G, or V2L. With the SigenStor, your EV becomes an active part of your home energy system instead of just using power.
Integration with Sigenergy’s Ecosystem
The SigenStor links directly to Sigenergy’s stackable home battery, so your solar, battery, and EV share energy smartly on one platform. You control it all from a single app and set rules for charging, storing, and exporting.
Future-ready Design
Thanks to its modular design, Sigenergy can update the SigenStor’s software and hardware as EV charging standards change. You won’t be stuck with outdated technology.
If you’re interested in learning a bit more about charging EVs, you might want to check out the following article titled, How Much Solar (and Battery) Do You Need to Charge an EV in Australia?
How Does the Sigenergy SigenStor Bidirectional EV Charger Work with Solar Panels?
During the day, your solar panels often make more electricity than your home uses. Without a smart charger, that extra power either goes into a home battery or back to the grid for a small credit. The SigenStor offers a better way.
DC Coupling
The SigenStor uses DC coupling to send extra solar energy straight into your EV battery without any conversions. Your panels produce DC, your EV stores DC, and the SigenStor links them smoothly. This wastes less energy and charges your EV faster.
When you send energy from your EV back to your home or the grid, your solar inverter changes it from DC to AC. That’s the only conversion in the whole process, making it much more efficient than standard AC chargers.
Using your EV as a Home Battery
After your EV is charged, the SigenStor uses that stored energy in several ways:
- At night: Draw power from your EV battery to run your home when your panels aren’t producing. This can reduce or eliminate your reliance on expensive peak grid power in the evening.
- During a blackout: The SigenStor switches to backup power instantly if the grid goes down. Your lights, fridge, and essential devices keep running without interruption.
- During peak pricing: Export stored energy back to the grid when electricity demand and prices are high. We recommend pairing this with an energy wholesaler like Amber to maximise what you earn.
If your EV’s battery is big enough, you might not need a separate home battery. The SigenStor and your EV can do what a standalone battery system does, often for less money.
If you’re interested in learning a bit more about bidirectional EV charging, you might want to check out the following article titled, Bidirectional EV Charging in Australia Explained: Your Guide to V2G, V2H, and V2L.
What Are the Pros and Cons of the Sigenergy Bidirectional DC EV Charger?
Pros
- DC fast charging at home: 25kW of charging speed is well above what any standard AC charging solution can offer at home.
- Highly efficient: DC coupling means less energy is lost moving power between your solar panels, EV, and home.
- Full bidirectional functionality: V2H, V2G, and V2L give your EV a role far beyond just a vehicle.
- Solar integration: Charge your EV directly from your solar panels during the day with minimal waste.
- Ecosystem integration: Connects seamlessly with Sigenergy’s stackable home battery for a fully unified energy system.
- Future-ready: Modular design supports software and hardware updates as EV charging standards evolve.
Cons
- EV compatibility: Your car needs to support bidirectional charging to unlock V2H and V2G. Not all EVs do yet.
- Higher upfront cost: The SigenStor costs more than a standard AC charger. It’s an investment that makes the most sense when paired with solar.
- Installation requirements: You may need to upgrade your switchboard or home wiring to support a 25kW DC charger.
- Grid approval: Depending on your distributor network service provider (DNSP), you may need approval before connecting a bidirectional charger to the grid.
If you’re interested in learning a bit more about bidirectional considerations, you might want to check out the following article titled, Solar Batteries vs. Electric Car Batteries: Which One Should Power My Home?
Is the Sigenergy SigenStor Bidirectional DC EV Charger Worth It?
If you have solar and an EV, the simple answer is yes for most people.
A standard AC charger works, but that’s about it. The SigenStor turns your EV into a full energy asset. It charges faster, uses solar energy more efficiently, powers your home during outages, and can earn you money when electricity prices are high. That’s a lot of value right in your driveway.
At PSC Energy, we help Australian homeowners figure out whether the SigenStor is the right fit for their setup. We’ll walk you through what’s possible, what it costs, and how to build a system that works for you now and in the future. It’s what we do.
If you’re interested in learning a bit more about public charging stations, you might want to check out the following article titled, Electric Vehicle (EV) Charging Guide 2026.
FAQ: SigenStor Bidirectional DC EV Charger
What is a DC EV charger? How is it different from an AC charger?
A DC EV charger converts power before it reaches your car, delivering electricity directly to your EV battery. An AC charger sends power to your car and lets the onboard system handle the conversion. DC EV charging is faster and more efficient because it skips that extra conversion step inside your vehicle.
What is a combined charging system (CCS)?
A combined charging system is a charging standard that supports both AC charging and DC fast charging through a single port. Most modern EVs sold in Australia use CCS, which means they’re compatible with both home AC chargers and public DC fast chargers.
Are DC fast chargers only for public charging stations?
Not anymore. Traditionally, DC fast chargers were only found at public charging stations because of their size and cost. The Sigenergy SigenStor changes that by bringing 25kW DC fast charge capability to your home, making it one of the most powerful residential charging solutions available in Australia.
What does public charging cost compared to home DC EV charging?
Public charging costs vary widely depending on the network and time of day. Home DC EV charging with a solar-connected system like the SigenStor can bring that cost close to zero during the day by using surplus solar energy to fast charge your EV directly.
