Sonnen solar batteries reviews

Based on 48 ratings Aus Ranking

  • 5 star 44
  • 4 star 3
  • 3 star 0
  • 2 star 0
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About Sonnen, Solar Batteries

Sonnen solar batteries review

Sonnen is a German brand that has attracted quite a bit of attention in Australia, partly due to manufacturing (well, assembling) batteries in South Australia (at one point - not currently).

Founded in 2010, Sonnen GmBH was one of the first suppliers of lithium ion solar batteries for home use in Germany. These days, sonnen is 100% owned by Shell (Shell Overseas Investment B.V.).

About sonnenBatterie Evo

Unveiled in early December 2021, the sonnen Evo battery offers 10 kilowatt-hours of usable storage and 5 kilowatts continuous power. Aside from a power boost compared to sonnen's previous home battery, other improvements include the Evo can be installed outdoors and has built-in backup capabilities. Available since 2022, you can learn more about sonnen's latest home energy storage product in our sonnenBatterie Evo review.

About sonnenBatterie Eco

Sonnen's flagship product prior to the Evo was sonnenBatterie Eco (yes, the weird caps situation is annoying), which translated simply means 'sun battery' - clever, huh? For some reason, things always sound cooler in German.

The sonnenBatterie Eco is an all-in-one unit - sort of. It includes AC battery inverter built-in but requires a solar inverter. The unit can be AC coupled or DC Coupled with 3-phase hybrid variant.

Various capacities are available, for example the 9.43 - which  actually has 15kWh nominal capacity, 13.5kWh of which is usable (same as Powerwall 2). The 9.43 has pretty low power output capabilities, a maximum 3.3kW.

You can view more specifications on our battery comparison table.

SonnenFlat

Sonnen battery owners in NSW, QLD (Energex region), SA, ACT, TAS and VIC have the option of joining sonnenFlat, which enables them to receive a guaranteed annual allowance of electricity from the mains grid for a fixed monthly fee, with supply charge included.

Pricey Batteries, But Okay

At the prices Sonnen charges, its batteries (like many others) currently won’t pay for themselves under realistic conditions within the warranty period (10 years or 10,000 cycles, whichever comes first) if purchased directly from the company.

Cheaper prices can be had from the company's partners; but you'll still need to crunch the numbers to determine if a Sonnen battery is right for you financially-speaking. 

A significant reduction in cost would certainly help Sonnen achieve its stated vision of a "world in which everyone is able to cover their energy needs with decentralised and clean energy sources".

Another disadvantage, depending on your situation, is the sonnenBatterie Eco is indoor-rated only - it can't be installed outside, but the arrival of the Evo solves that. Other than that, we haven't found much to complain about, except for some of Sonnen's claims from time to time that we've found to have been a little optimistic.

The products are good and the company seems stable - so if you're happy to fork out the extra cash and are aware of its limitations, a Sonnen battery could be a suitable energy storage solution in your situation.

If you're an Australian Sonnen owner, your opinion of your system would be valued by other visitors this page - please leave your rating and review.

Sonnen Solar Battery Reviews

Very reliable battery and monitored by Sonnen
Bought From: Variety Solar Pty Ltd
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Bought From: Solaire Connect Show additional information
The battery works really well and we love the monitoring functions. These allow us to adjust our component usage so we have power from the battery after sundown for the next few hours, being the expensive time of day for grid power.
Bought From: Solaire Connect
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Bought From: Green Coast Solar and Electrical Pty Ltd Show additional information
Now that the battery backup has been installed correctly, it is working well.
Bought From: Kozco Energy Group
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Bought From: Positive Energy Solutions Pty Ltd Show additional information
The battery is our system monitor.
We now need to find an energy retailer that pays a better feed in price than AGL.
Bought From: Energy Buster
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Very good
Bought From: Solar Dynamics
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The 11kW (9.9kW usable) sonnenEvo battery has been set for a reserve of 20% of capacity but so far it has not yet been tested as a "level 3" backup. The sonnen app is simple to use and fantastically informative providing real time and historical data. It has provided our home with "free" power from sunset to sunrise.
Bought From: Helcro Solar
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We just wanted to share our amazing experience of having a battery installed to our solar panel system. We opted for a Sonnen battery.

It has been some weeks since the team completed the battery install, and well, what can we say about the experience? Go for it! We are not regretting our decision!

Throughout the entire process, Kik Electrics, and the very supportive Justin Raymond, were great! Justin provided us with the full information and knowledge that we required to gain the most from installing a battery/backup system. He also coped very well with all of our questions!! Justin was also very supportive regarding the application to the then relevant Victorian rebate scheme. The installation team were diligent, informative, and completed the install with minimal disruption. They provided post fitting knowledge on how to operate the system to maximize the efficiency with our expected use. They were efficient and friendly and really did tidy up, and left our place spotless.

If anyone out there is looking for a competent, capable, informative, and supportive team, you will not go wrong with Kik Electrics!!
Bought From: KIK Electrics Pty Ltd
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Bought From: All Energy Systems Australia Pty Ltd Show additional information
We bought our battery principally for environmental reasons. We're now in Spring and the energy we're importing is about 12% of what it was at the same time a year earlier.
Bought From: Essential Solar
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Great Performance
Bought From: Ingot Energy
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Bought From: SAE Group Brisbane East Show additional information
Bought From: Solar Dynamics Show additional information
Bought From: Variety Solar Pty Ltd Show additional information
Bought From: Penrith Solar Centre NSW Show additional information
Bought From: Variety Solar Pty Ltd Show additional information
Great performance my house of 5 uses on average over the last month is 1.2kw per day from the grid.
Bought From: Tindo Solar
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Bought From: Sapphire Solar Show additional information
It’s early days yet but I delayed buying a battery thinking we couldn’t justify it.
However our move to one energy source, electricity and that source rapidly increasing in costs, I believe the time is right to install now to avoid additional peak rate costs.
So far the battery has proven to meet / match our evening peak load for meal preparation and air conditioning, helping us to make our home comfortable at no additional operating costs.
Bought From: RK Solar And Consulting NSW
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Bought From: SAE Group Brisbane East Show additional information
Bought From: Positive Energy Solutions Pty Ltd Show additional information
Sonnen Battery looks great. Was neatly installed. Love the app, it fills by 12 noon most days. Highly recommend paying more for a quality product like Sonnen.
Bought From: Sapphire Solar
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Bought From: Solar Wholesalers SA Show additional information
Compact and modular in design. Very quiet operation and has a fantastic monitoring app.
Bought From: Solar Wholesalers SA
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Bought From: Solar Wholesalers SA Show additional information
New Meter now installed, seems to work to my expectations.
Love the app, can easily track remotely
Sonnen monitoring made contact when battery offline
Bought From: Kozco Energy Group
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We're proud to support Sonnen, being quality German technology, & made in South Australia, supporting local jobs.
Bought From: Solar Wholesalers
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It us a Sonnen 15 kw. I would like a larger capacity battery but 15KW is all they have. The technology is Lithium Ferrous Phosphate and it was installed a few years ago by Mo at Green Solar Energy. Working well.
Bought From: Green Solar Energy NSW
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Great solar feed in options via Sonnen
Bought From: Smart Energy Answers Sydney O
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Bought From: Enervest Residential Show additional information
The battery has run flawlessly since install 3 years ago. The app is easy to navigate to enable constant monitoring whenever wanted.
Bought From: Natural Solar
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Bought From: Apex Energy Australia Show additional information
Bought From: Samar Tech Show additional information
Bought From: Sapphire Solar Show additional information
Bought From: Adam Solar Show additional information
The Sonnen Battery Unit has the inverter & all the smarts built in so we know exactly where we are with the system via their management app, work nicely & just don’t have to worry about it, typical German Engineering solid & reliable ????
Bought From: RK Solar And Consulting NSW
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Too soon to comment on reliability or backup capability.
Bought From: RK Solar And Consulting NSW
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Great service. Offers an app to see how much power has been used, which is one of my favourite features.
Bought From: Natural Solar
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So far we are very happy with the Battery. It is wonderful seeing the amount of the day we are running under our own power and not purchasing from the grid. Looking forward to seeing the savings add up over the months and years ahead.
Bought From: DQ Electrical
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With our time constraint, there wasn't much of a choice in the type of battery. We were also applying for a Government subsidy. I had previously attended a Sonnen information session and thought the Sonnen was up to speed but still think about the Tesla and think about whether or not it would make a difference in performance and cost.
Bought From: NRG Solar SA
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Bought From: Perfect Solar Power Show additional information
Bought From: Natural Solar Show additional information
Bought From: SAE Group QLD Show additional information
The app is a bit crappy.
Bought From: Natural Solar
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Quiet, it does its job. Performs well, during the night, the battery powers our home quite adequately. No more depending on the domestic mains for nightime power.
That in itself, is a bonus !
Bought From: Green Solar Energy NSW
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Bought From: Natural Solar Show additional information
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