Battery Storage

Battery Backup Systems

Imagine a world with no power bills… It’s time to declare your independence!

Pay $0 for Electricity for 10 years with the utility of the future and the home energy storage system that has seen great success in Germany. When you purchase an eligible Cool or Cosy solar system and sonnenBatterie, plus successfully sign up with sonnenFlat.


sonnen will waive the usual monthly flat electricity fee for 24 months for all Cool or Cosy customers, meaning you’ll get true freedom from rising power costs, enabling you to become independent from conventional retailers and take your energy future into your own hands.

Battery backup systems linked to solar systems are fast becoming a popular way to save on electricity bills and gain more energy independence. A battery backup system allows you to store energy while the sun is shining, with the ability to store surplus power generated by the solar system for use at night or on cloudy days. You also have stored power to use if the grid goes down, or at any other time you need it.

Your Cool or Cosy solar system and sonnenBatterie energy storage 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. With sonnenFlat, you receive a guaranteed amount of energy and in return some of the energy stored in your sonnenBatterie will be used to assist in the stabilisation of the electricity grid.

sonnenFlat places are strictly limited and terms and conditions apply. Don’t miss the chance to do away with your electricity bill – call us today on 83 525 588 for more information.

Save on your electricity bills with a high quality Solar Panel system and Battery Backup!

sonnenBatterie Features:

20 year Design Life backed by an industry leading warranty – 10,000 cycles (2.7 cycles per day) or 10 years before battery storage level degradation

Store excess solar power for use at night to help maximise your solar self-consumption.

Sonnen Protect provides backup power in events of grid outages.

The Sonnen App and online portal allow you to track yourself consumption, battery state of charge as well as turn off and on devices connected to Z-wave Power Adapters.

Smart Energy Management software manages your energy intelligently throughout the day.

The sonnenBatterie will store the surplus energy generated by your solar PV system in times when you don’t have any need for it. The stored energy from the daytime is then at your disposal in the evening and during the night.

The sonnenBatterie is much more than just a battery, it’s an intelligent storage system that automatically adjusts the energy use so that most of your self-generated solar energy stays in your household.


Learn More About Battery Backup Systems

At Cool or Cosy we don’t believe in ‘Guess-Work’. We will on every occasion come to your home to accurately assess and provide an ‘On-the-spot’ FIXED-Price quotation to avoid any nasty surprises.

Want a quick estimate? Click on the button below to use our Solar and Battery calculator.


For quality battery backup systems in Adelaide, get in touch with one of our representatives by calling 08 8352 5588 or by completing our online quote form to arrange a FREE No-Obligation FIXED-Price assessment and quotation.

By adding a sonnenBatterie your house will be able to receive power from three sources – the solar system when it is producing enough power, the battery bank, and the electricity grid.

An Australian requirement on all grid-connected solar systems is that they shut down if they detect failure of the grid. This is a safety requirement to protect any workers making repairs to the wires outside your home.

A properly designed Cool or Cosy solar system with sonnenBatterie safely disconnects your house from the grid in the event of a power outage; your system will then switch over the power stored in the battery system providing you continuous power to your essential circuits, even in times of blackout.

So, is a battery backup system worth the extra cost?

Our unique Solar Rental Company ‘Rent-to-Own’ Battery-Backup-Plan can have you enjoying the benefits of Energy Independence for ZERO $ Upfront and the savings you make from using all of your generated Solar Power (instead of giving it to the power companies for a few cents) can often pay for the battery system without you having to dip into your own pocket!

One of the key benefits of the Rental programme is that the Batteries are fully maintained by Solar Rental Company and at the end of the term the batteries are replaced for FREE, ready for you to enjoy several more years of FREE power.


Battery Back-Up Makes Sense !

For quality solar panels and battery back-up systems in Adelaide, get in touch with one of our representatives by calling 08 8352 5588
or by completing our online quote form.
Save on your power bills with the best solar installer in Adelaide!

Want to learn more about us ?

Contact Cool or Cosy today to speak with one of our friendly consultants who is waiting to take your call

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