Sonnen Battery Sydney
German-Engineered Home Battery Storage With Backup Built In
sonnen has been building smart home batteries in Germany for well over a decade, and its latest systems bring that engineering to Sydney homes in a cleaner, more flexible package. The new sonnenBatterie 12 combines a hybrid inverter, modular LFP storage and automatic backup power in one system, while the sonnenBatterie Evo offers a compact, outdoor-rated option that pairs with almost any existing solar setup.
Both systems are designed to do one job exceptionally well: capture your surplus daytime solar, hold it until the evening peak, and keep selected circuits running if the grid goes down. With a warranty that covers the inverter, power electronics, energy manager and battery modules together, sonnen suits homeowners who want long-term certainty rather than the cheapest kilowatt-hour.
Solar National designs and installs sonnen battery systems across Sydney with CEC-accredited installers, honest sizing advice and the federal battery rebate applied upfront, so you never have to claim it yourself.
What Our Clients Have To Say!
Why Choose a sonnen Battery
Premium German design, whole-system warranty cover and backup power as standard, built for Sydney homes that want dependable storage for the long haul.
Hybrid Flexibility
The sonnenBatterie 12 supports both AC and DC coupling. Add it to an existing solar system or build it into a new installation with solar panels connected straight to its hybrid inverter.
Backup Power Included
Easy Backup comes standard, switching selected circuits to battery power in under 50 milliseconds during an outage. Black start capability means the system can restart and recharge from solar even when the grid stays down.
Whole-System Warranty
sonnen’s 10-year warranty covers the complete system, including the inverter, power electronics, energy manager and battery modules, rather than the battery cells alo
Built for Indoor or Outdoor Walls
The sonnenBatterie 12 battery stack is rated IP65 with an IP66 inverter, and operates from -20°C to 55°C, giving you flexibility to install in a garage, side passage or external wall.
Near-Silent Operation
With natural convection cooling and no fans, the battery stack runs at under 15 dB(A), quiet enough to install near living areas without noticeable noise.
Smart Energy Management
The sonnen App shows solar generation, battery charge and household usage in real time, while built-in charging forecasts help the system store solar at the right time of day.
Technical Specifications
SonnenBatterie 12 Specs
Specifications below are sourced from sonnen’s official Australian datasheet.
Energy Storage
- Battery Modules: 1 to 3
- Usable Capacity: 9.4 kWh / 18.8 kWh / 28.2 kWh
- Nominal Capacity: 9.6 kWh / 19.2 kWh / 28.8 kWh
- Battery Chemistry: Lithium Iron Phosphate (LFP)
Power Output (sonnenInverter Hybrid, Single-Phase)
- Continuous Output: 3.0, 3.6, 4.6, 5.0 or 6.0 kW (set at commissioning)
- Backup Peak Power: Up to 7.2 kVA for 1 minute, up to 8.7 kVA for 15 seconds
- Backup Switch-Over Time: Under 50 ms
- Black Start: From battery and solar
Solar Input
- Maximum Recommended Solar: 12 kWp
- MPPT Trackers: 2
- Maximum Input Voltage: 550 V DC
- Maximum Inverter Efficiency: 97.8%
Physical
- Battery Stack Dimensions (H × W × D): 88 / 139 / 190 × 56 × 29 cm (1 / 2 / 3 modules)
- Weight: Approx. 87 kg per battery module
- Protection Rating: IP65 (battery), IP66 (inverter)
- Operating Temperature: -20°C to 55°C
- Noise: Under 15 dB(A) (battery stack)
- Installation: Floor-standing with wall support
Warranty
- 10 years, 10,000 cycles or 8,500 kWh throughput per kWh, whichever comes first
SonnenBatterie Evo Specs
- Usable Capacity: 10 kWh (11 kWh nominal)
- Continuous Power: 5 kW
- Surge Power: 7 kW
- Coupling: AC-coupled, single-phase
- Protection Rating: IP56
- Operating Temperature: -5°C to 45°C
- Dimensions (W × H × D): 710 × 1400 × 427 mm
- Installed Weight: Approx. 163.5 kg
- Warranty: 10 years or 10,000 cycles
Sonnen Battery Range
Sonnen Battery Range
sonnen offers two home battery systems in Australia, and the right one depends on whether you are building a new system or adding storage to existing solar.
Feature | sonnenBatterie 12 | sonnenBatterie Evo |
System Type | Hybrid (AC and DC coupling) | AC-coupled |
Usable Capacity | 9.4, 18.8 or 28.2 kWh | 10 kWh per unit |
Continuous Power | 3 to 6 kW (selectable) | 5 kW |
Surge Power | Up to 8.7 kVA (15 s) | 7 kW |
Solar Input | Up to 12 kWp recommended | Works with existing solar inverter |
Protection Rating | IP65 battery, IP66 inverter | IP56 |
Best For | New solar and battery builds, growing households | Adding storage to an existing solar system |
sonnenBatterie 12 is sonnen’s newest platform and the system we recommend for most new installations. Its hybrid inverter connects directly to your solar panels, and storage scales in 9.4 kWh steps as your household grows.
sonnenBatterie Evo is a fully integrated, all-in-one cabinet that pairs with most existing solar systems regardless of inverter brand. It is a tidy retrofit option for homes that already have solar and simply want to stop exporting cheap energy.
Not sure which suits your home? We review your existing system and energy usage, then recommend the model that fits. You can also compare sonnen with every brand in our solar battery range.
Is a sonnen Battery Right for Your Home?
A sonnen battery is a strong fit if you:
- Want a premium, German-engineered system with whole-system warranty cover
- Are adding a battery to existing solar and want to keep your current inverter
- Value quiet operation for an indoor or near-living-area install
- Want backup power included without add-on hardware
- Like the idea of a manufacturer-run VPP with no retailer lock-in
Consider another brand if you:
- Need more than 6 kW of continuous power to run large loads at once
- Want the lowest possible cost per kilowatt-hour
- Need a battery that connects across all three phases of a three-phase supply
Our job is to recommend the battery that suits your home, not simply the one on our list. If sonnen is not the best match, we will compare it with options such as BYD, AlphaESS, Growatt or Sungrow.
Installation
How We Install Your sonnen Battery
Most sonnen installations in Sydney are completed within one day once approvals are finalised.
Step 1: Usage and Solar Review
Share a recent electricity bill and details of any existing solar. We assess your evening consumption, tariff and export levels to recommend the right model and capacity.
Step 2: Site Inspection
We check your switchboard, phase supply, existing solar inverter and the best location for the battery, with attention to shade, ventilation and access.
Step 3: System Design
We design a DC-coupled sonnenBatterie 12 for new solar builds, or an AC-coupled Evo or sonnenBatterie 12 for existing systems, and select the backup circuits that matter most to you.
Step 4: Approvals and Rebate Paperwork
We lodge your network connection application with Ausgrid, Endeavour Energy or Essential Energy and complete all federal rebate documentation.
Step 5: Installation and Commissioning
Our team installs the battery stack and inverter, wires your backup circuits, sets the inverter output level and tests backup switch-over before we leave.
Step 6: App Setup and Handover
We connect your system to the sonnen App, explain your energy dashboard, and help you enrol in a VPP program if you choose to join one.
Our Accreditations
Sonnen Virtual Power Plant
Earn More From Your - Battery With Sonnen Connect
sonnen runs its own Virtual Power Plant, sonnenConnect, for sonnenBatterie owners in NSW and other National Electricity Market states. Your battery supports the grid during high-demand events, and you receive regular credits in return, while you remain free to choose your own electricity retailer. You set a backup reserve in the app so your home always keeps power for its own needs. Learn how Virtual Power Plants work.
Government Rebates
Sonnen Battery Rebates in NSW
Federal Cheaper Home Batteries Program
Eligible batteries receive an upfront discount through Small-scale Technology Certificates (STCs). For installations from 1 May 2026, the first 14 kWh of usable capacity attracts the full rate (currently around $252 per kWh), capacity between 14 and 28 kWh receives 60% of that rate, and capacity between 28 and 50 kWh receives 15%. A single-module sonnenBatterie 12 (9.4 kWh) sits entirely within the full-rate band. The rate steps down every six months, so installing sooner secures a higher discount. Read our full battery rebate guide.
NSW Virtual Power Plant Incentive (PDRS)
Connecting your battery to an approved Virtual Power Plant can unlock an additional NSW incentive under the Peak Demand Reduction Scheme, calculated on up to 28 kWh of usable capacity. We confirm which VPP pathway qualifies for your sonnen system and handle the paperwork at installation.
Flexible Finance
Spread the cost with finance options designed so your monthly bill savings help cover your repayments.
Comparison
SonnenBatterie 12 vs Other Home Batteries
See how sonnen compares with other leading batteries we install in Sydney.
Feature | sonnenBatterie 12 | |||
Usable Capacity | 9.4 to 28.2 kWh | 13.5 kWh per unit | 9.6 to 25.6 kWh | 5 to 30 kWh |
Continuous Power | Up to 6 kW | 11.5 kW | Inverter dependent | Up to 6.2 kW |
Built-in Inverter | Yes (hybrid) | Yes | No | No |
AC and DC Coupling | Both | DC (limited AC) | Via inverter | Via inverter |
Backup Included | Yes, standard | Yes | With compatible inverter | With backup setup |
Protection Rating | IP65 / IP66 | IP67 | IP55 | IP66 |
Warranty Coverage | Whole system, 10 years | 10 years | 10 years | 10 years |
Own VPP Program | Yes (sonnenConnect) | Yes | No | No |
Frequently Asked Questions
Yes. sonnen is a German battery specialist headquartered in Wildpoldsried, Bavaria, with local sales, service and support in Australia. Its batteries use LFP chemistry, include backup power as standard and carry a 10-year warranty covering the entire system, which makes sonnen a strong choice for homeowners who prioritise reliability and long-term support.
The sonnenBatterie 12 is a hybrid system with its own inverter, supporting both AC and DC coupling and scaling from 9.4 to 28.2 kWh. The Evo is an all-in-one AC-coupled battery with 10 kWh of usable storage, designed mainly for adding a battery to existing solar.
Yes. Both models can be AC-coupled to an existing residential solar system, so you can keep your current inverter. We check your inverter’s age and compatibility during the site inspection.
Yes. Backup power is included as standard. The sonnenBatterie 12 switches selected circuits to battery power in under 50 milliseconds and can black start from battery and solar. How much you can run depends on the inverter output setting, up to 6 kW continuous, so we choose your backup circuits carefully during design.
The sonnenBatterie 12 delivers up to 6 kW continuous, with short surges up to 8.7 kVA for motor starts. That comfortably covers lights, fridges, internet, and a split-system air conditioner, but not every large appliance at once. Ducted air conditioning, electric hot water and EV charging are usually excluded from backup circuits.
Under the federal program, a 9.4 kWh sonnenBatterie 12 currently attracts around $2,370 off, and an 18.8 kWh system around $4,250, based on usable capacity. A VPP connection may add the NSW PDRS incentive on top. See our battery rebate guide for details.
sonnenConnect is sonnen’s own Virtual Power Plant program for sonnenBatterie owners. It pays regular credits for allowing sonnen to use part of your battery during grid demand events, and it does not tie you to a specific electricity retailer. Learn more on our Virtual Power Plant page.
Most Sydney households using 15 to 25 kWh per day suit a 9.4 or 10 kWh system. Larger families, pool owners and homes with EVs often benefit from 18.8 kWh or more. We size your system from your actual bills. Book a free consultation.
Yes. The sonnenBatterie 12 is modular and can grow from 9.4 kWh to 28.2 kWh by adding battery modules as your energy needs change.
sonnen provides a 10-year warranty covering the inverter, power electronics, energy manager and battery modules. For the sonnenBatterie 12, cover lasts 10 years, 10,000 cycles or 8,500 kWh of throughput per kWh of capacity, whichever comes first. Your rights under Australian Consumer Law also apply. If you ever need support, our warranty claim team can help.
Yes. The sonnenBatterie 12 is rated IP65 with an IP66 inverter, and the Evo is rated IP56. sonnen lists an optimal operating range of 15°C to 30°C, so we install on a shaded wall or in a garage to protect performance through Sydney summers.
sonnen’s current Australian models connect on a single phase. On a three-phase property, the battery can usually be connected to one phase, with backup limited to circuits on that phase. If you need full three-phase backup, we will recommend a three-phase battery instead.
No. The sonnenBatterie 12 battery stack uses natural convection cooling and operates at under 15 dB(A), making it one of the quietest home batteries available.
Installation is usually completed in a single day. Network approval and paperwork beforehand typically take one to two weeks, and we manage all of it for you.
Ready to Power Your Home With sonnen?
Store your own solar, keep the lights on during outages and enjoy the peace of mind that comes with German engineering and whole-system warranty cover. Solar National handles design, rebates, approvals and installation from start to finish.
Book a free consultation today or call 1300 179 949.
