The sonnenBatterie eco – the start of your independence.

The sonnenBatterie is not just a battery, it's an intelligent storage system that automatically adjusts the energy usage in your household. In combination with solar panels the sonnenBatterie will enable you to supply yourself with clean energy – thus making you independent and protecting you from energy price hikes.


The sonnenBatterie has a minimum lifespan of 10,000 charging-cycles. So you can rest assured that it will supply you with clean energy for many years to come.


In the sonnenBatterie we exclusively use lithium iron phosphate batteries – the safest lithium battery technology available today.


Because of its attractive purchase price and short payback periods, the sonnenBatterie is possibly your most economic access to clean energy.


How the sonnenBatterie gets you through the day.

Clean energy during the daytime, in the evening and at night.

sonnenBetterie energy curve

Morning: minimal energy production, high energy needs

At sunrise the solar panels start to produce energy, though not enough to cover the morning energy needs. The sonnenBatterie will bridge the gap with the stored energy from the previous day.

Midday: highest energy production, low energy needs

In the daytime the energy generated from the solar panels is at its peak. But since nobody is home the energy consumption is very low so that most of the generated energy is stored in the sonnenBatterie.

Evening: low energy production, high energy needs

The highest daily energy consumption is in the evening when the solar panels produce little or no energy. The sonnenBatterie will cover the energy need with the energy produced in the daytime.


Intelligent, long-lasting and economical

The sonnenBatterie is a high-tech storage system that has proven itself in thousands of households – every day. The combination of a PV system and a sonnenBatterie will allow you to cover about 75% of your yearly energy requirement with self-produced and clean energy. Since your energy is being generated on your roof and not by some anonymous energy provider you are more independent than before. So take your energy future into your own hands and reduce your energy costs to a minimum. The decision for a sonnenBatterie is also a decision for the highest standards in safety and quality that "Made in Germany" stands for.


sonnenBatterie Brochure



sonnenFlat is the ideal addition to your sonnenBatterie and solar system. sonnenFlat enables you to become independent from conventional retailers and take your energy future into your own hands.

What is sonnenFlat?

It is an energy tariff for sonnenBatterie owners. You receive a guaranteed amount of energy for a low monthly fee and in return some of the energy stored in your sonnenBatterie will be used to assist in the stabilisation of the electricity grid.

How does it work?

The offer is open to customers who install the sonnenBatterie and who have an existing or new solar system. Once you have purchased and installed your sonnenBatterie, you can sign up for one of three sonnenFlat packages on the sonnen website

Your solar and sonnenBatterie system will cover a large portion of your energy consumption but not all. Therefore under a conventional retail bill you will still have energy charges and fixed supply charges to pay. sonnenFlat replaces both these charges with one low monthly fee, saving you money on electricity bills.

Each package requires a suitable capacity solar system installed on the roof of your home. The solar system, the sonnenBatterie and sonnenFlat will combine to provide your energy needs to the consumption allowance. If you exceed the allowance in a 12 month period you will be charged for the excess consumption at a low per kWh energy rate.


sonnenFlat Fact Sheet



The Wilsons annual household consumption is 10,000 kWh. The Wilsons currently pay $0.31372/kWh (incl. GST) which leaves them with an electricity bill of $3,137.20 excluding daily charges.
The solar system of 7.5 kW and the sonnenBatterie eco 8.10 enable them to participate in the sonnenFlat 10, which leaves them with a much reduced energy bill as per the calculation above.


Clean energy for all – this is how it works.

Discover the sonnenBatterie and the sonnenCommunity in these short Videos.


Clean energy for all:

Presenting the sonnenBatterie and the sonnenCommunity.


Self-produced energy:

Around the clock – discover how the sonnenBatterie works.


During the Day:

The sonnenBatterie optimises the usage of your solar power in your house.


Intelligent Control Centre:

The sonnenBatterie is an intelligent control centre that manages all the solar power in your household.



The sonnenBatterie will reliably supply you with energy during the night time using the stored solar power generated during the day.


A Connected Community:

In the inter-connected sonnenCommunity all members share their energy with one other to reach a maximum degree of independence.


Keep an eye on your energy supply: with the sonnenApp

With the sonnenApp you'll be able to check your energy usage and production - anytime and from anywhere. Use the sonnenApp on your smartphone or tablet to monitor, analyse and control the supply and demand of your household.


sonnenBatterie App

Technology from the market leader

The sonnenBatterie comes with the experience of 20,000 installed systems - build into each unit, the newest technology for highest independence and maximum longevity.

All in a compact case that offers highest flexibility thanks to its modular design.


Dimensions (H/W/D in cm)

Base cabinet (2 kWh): 70/64/22
Dimensions 4 – 10 kWh: 137/64/22
Dimensions 4 – 16 kWh: 184/64/22

Storage size

2 kWh – 16 kWh
(expandable in steps of 2 kWh)


10 years or 10,000 charge cycles

Complete storage system

Everything included, ready to connect


1.5 kW - 3.0 kW (single phase)
1.5 kW - 3.3 kW (three phase)

Design Lifespan

20 years

System intelligence

With the use of predictive charging you maximize your PV output.

Operating mode

Single phase, Three phase and Hybrid.


Want to know more

Contact us today to speak with our technicians

sonnen Partner