Sonnen Solar Battery Review 2022 - Tesla Powerwall Comparison & Prices (2022)

Where can you find local Sonnen Battery distributors?

You don’t need to go to a shop to buy a Sonnen battery all you need to do is phone a few local solar installers and get prices.

As you won’t have the knowledge to install a solar battery yourself, there is no point going to buy one then ringing an installer. Plus installers get wholesale rates and sell on for a markup.

You will find most will sell for around the same price, but the installation can vary by hundreds of dollars. So shop around before committing.

How do Sonnen batteries work?

Sonnen batteries provide you with clean energy throughout the day and night. Here’s how Sonnen optimizes your power supply-


During the morning, your solar panels start generating energy. But the amount of energy is not adequate to meet the high demands during the morning. You may need to run your water heaters, cook food in the microwave and use other appliances.

The extra energy you need is supplied by Sonnen batteries from the stored energy from the previous day.

(Video) Sonnen Battery Vs Tesla Powerwall II

During the day

Your solar panels generate peak energy during the day when plenty of sunlight is available. But most of this energy is not used as nobody is home at this time. So most of the energy is stored in the Sonnen batteries.

Evening and night

Households have the highest energy consumption at night when solar panels are not generating electricity. But your solar panels are not producing any energy during this period. So your energy needs are met from the stored energy in the batteries charged during the daytime.

What are the specifications?

Sonnen calls its sonnenBatterie eco as the all-in-one solution for residential solar needs. The batteries are made up of lithium iron phosphate cells (LiFePO4) which offer full-proof safety and greater longevity. They are also environment-friendly as the batteries don’t contain any toxic heavy metals.


The 9th generation sonnenBatterie eco is available in a range of sizes from 5 kWh to 15 kWh. You can expand your battery system by adding 2.5 kWh modules separately with a limit of 45 kWh.

You may also be able to find 8th generation eco models in the range of 2 kWh to 16 kWh. You can add more capacity through the addition of 2 kWh modules to your system.


Sonnen batteries come in different dimensions based on their capacity, connection type and cabinet version.

The dimensions of a 9th generation 5 kWh base cabinet is 88 x 67 x 23 cm (height x width x depth). A 7.5 kWh model with cabinet option 3 measures 186 x 67 x 23 cm. The models can weigh anything from 81 kg (5 kWh base model) to 200 kg (15 kWh model).

The base model of the 8th generation 2 kWh eco version measures 70 x 64 x 22 cm. The dimension of the 16 kWh single-phase eco 8 is 184 x 64 x 22 cm. The weight of the systems can vary from 55kg to 273 kg.

(Video) Sonnen Battery vs Tesla Powerwall 2: 2022 Lithium Battery Comparison. Best back up battery is?


SonnenBatterie eco has a high output considering its storage capacity. A 5 kWh system can give you an output of 4.5 kWh. So you can say that the output of the sonnenBatterie eco is 90% of its storage capacity.

System Intelligence

sonnenBatterie eco comes with intelligent software to maximize your energy efficiency. The intelligence system automatically balances household energy consumption during durations of peak energy generation. It also features predictive and intelligent charging, optimizing energy usage based on factors like weather conditions.

System scope

SonnenBatterie eco is a complete storage system ready to be hooked up with your solar power installation.

Operating mode

You can use Sonnen batteries with a single-phase, three-phase and hybrid connections.


SonnenBatterie eco can be integrated with all common heat pumps and other cogeneration units.

What is Sonnen eco solar battery warranty?

Sonnen offers a warranty of 10 years or 10,000 charge cycles on their batteries. But to enjoy the warranty you need to connect your battery to the internet so that it can receive automatic software updates.

Otherwise, the faults and defects of your battery may not be covered by Sonnen.

Can you install the Sonnen battery outdoors?

Sonnen batteries are made for installing inside a protective place like your garage or home. The systems can endure up to 45-degree Celsius of heat and not ideal for outdoor installation. In case you do need to install it outdoors, you need to buy a separate casing.

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You may also need to install a cooling unit that is available for purchase separately.

How well does a Sonnen Battery work with an Enphase inverter?

Generally, you need to install an inverter with your solar panels when you want to store AC current in any battery storage system. Enphase Energy is a well-known microinverter manufacturer providing inverters for PV systems. So do you need to install an Enphase inverter for Sonnen batteries?

As we already said, Sonnen offers a complete package with an inbuilt inverter in Australia. So you don’t need to install a separate Enphase inverter which saves you cost and effort.

If you somehow find a Sonnen system without an inverter, then you can go ahead and use an Enphase inverter without any troubles. Just make sure the size is big enough to charge your batteries adequately.

How do you tell if your Sonnen battery is not working?

You should keep your eyes on the Sonnen logo on the front of the storage unit. If anything goes wrong, you will see the logo changing colours, or it can also turn off.

When your Sonnen battery malfunctions, an automated notification is sent to the local technical team who fix your device remotely or send a technician.

Is it possible to go “Off-Grid” with Sonnen batteries?

Sonnen batteries are an ideal way to manage your energy bills, but they may not be suitable for going completely off-grid. The Sonnen batteries like other battery storage systems can store limited hours of energy. That means you won’t be able to go off-grid with even a 15 kWh system as the daily household energy consumption is around 17 to 20 kW per day.

If you are really considering going off-grid, then you may need to invest in a high capacity Sonnen system of 45 kWh. But that is a costly proposition and suitable mostly for commercial purposes.

(Video) Tesla Powerwall 2 Vs Enphase IQ battery: 2022 Comparison

How much backup does the SonnenBackup-Box deliver?

Sonnen provides an emergency power option to deal with power outages. The sonnenBackup-Box can be easily installed with sonnenBatterie systems and delivers up to 2.8 kW for a single phase.

If you pair the sonnenBackup-Box with a 10 kWh battery system, you can derive enough power to drive your lights, internet router and refrigerator for the whole day.

What is the Sonnen battery app?

You can download the Sonnen battery app on your mobile or tablet to monitor, manage and view your complete energy generation and consumption. The app syncs with your Sonnen battery system and displays the status of your batteries and historical data. You can see the amount of power generated and consumed by your home with the touch of a button.

The app also offers comprehensive data about the energy consumed from the grid and the amount exported back. You can also seek assistance and resolve your queries about Sonnen installations through the app.

Sonnen battery app is available to anyone who purchases a Sonnen system in Australia.

How is Sonnen battery using blockchain technology?

The use of blockchain is becoming popular in the energy sector. The aim of the technology is to bring decentralisation in the industry and enable the peer-to-peer sale of electricity between households. The concept is really simple- the extra energy your solar panels produce in excess of household consumption is sold to other homes connected to the same network.

This is also the basis of the Sonnen Community and the sonnenFlat scheme where households sell power to their neighbourhoods and also stabilise the local grid (discussed later).

Blockchain technology was initially developed to record the transactions of cryptocurrencies. But the technology proved to be useful for any application where you need a transparent and decentralised way to record information.

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The use of the technology will enable both Sonnen and the homeowners to track every kWh traded on the platform. Additionally, the transactions will also be transparent and need no extra costs for energy trading.

Sonnen has already started the project in Europe and now testing it out in Australia.


Is Sonnen better than Tesla? ›

Although in regards to power output, the lithium NMC batteries used by Tesla have a much higher discharge rate which provides greater power output, 5kW continuous, compared to a maximum of 3.3kW power rating from the Sonnen ECO.

How much does a Tesla Powerwall cost? ›

Tesla Powerwall Cost

The Tesla Powerwall has a higher price than many other battery systems, but you also get a high storage capacity and power output. The price is calculated based on how many units you order: a single Powerwall sells for $10,500, but two units will cost $17,000 ($8,500 each).

Is there anything better than a Powerwall? ›

The LG Chem battery is our top pick for the best Tesla Powerwall alternative because it is thoroughly tested technology, can be installed at the same time as solar panels or after, and comes with a great warranty.

What is the difference between Powerwall 2 and 3? ›

The primary difference between Powerwall and Powerwall 3 is that the updated version can be wall- or floor-mounted. It's also more flexible and easier to install in your home.

Which company battery is best for solar system? ›

What Are the Best Batteries For Solar Systems in 2020
  • Best overall off-grid battery for homes: Discover 48V lithium.
  • Best value off-grid battery for homes: Crown CR430 FLA.
  • Best off-grid battery for vacation homes: Fullriver DC400-6 AGM.
  • Best battery backup for grid-tie systems: Fullriver DC400-6 AGM.
Jul 9, 2020

How much does a Sonnen battery cost? ›

The sonnenBatterie 9.53 hybrid starts at 2.5kWh for $8,700. However, most customers start on either a 7.5kWh solar battery from $12,000, or 10kWh from $14,000.


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