What is SonnenFlat? $0 Power Costs With Up To 100% Energy Autonomy

With soaring electricity prices and a world-leading penetration of solar power systems, Australia’s Energy Industry has been tipped on its head this month with sonnen now offering households the chance to say goodbye to their energy retailer. sonnnenFlat is now available in Australia, a deal where sonnen offers ‘free electricity’ in exchange for a small monthly fee and the right for sonnen to draw down power from your battery to the grid when needed.

Households that buy the sonnenBatterie can sign up for sonnenFlat, saying goodbye to their energy retailer and rising power prices.

What is sonnenFlat?

Power prices have risen more than 100% in the last 10 years alone, and jumped up a further 20% this month. As energy bills rise, households are looking for differnt ways to power their home, such as intalling a solar power system with intergrated battery storage from sonnen and then signing up to sonnenFlat:

sonnenFlat savings table

The following steps show you how you too can maximise your energy autonomy. The more steps you take, the greater your energy autonomy will be.

A 5kWh system can produce on average 22 kWh of energy a day. The reality however is you can’t take complete advantage of your system. Any power you don’t immediately use during the day is lost. Solar therefore gives you an average of 25% energy autonomy, but is the critical first step you must take to reach complete energy autonomy.

Combining an 8kWh battery to your system will more than double your self-consumption. The graphs above illustrate how you simply store your produced energy in your battery, then redistribute this energy to when you can actually use it. Your PV cannot generate energy in the early morning or evening so without battery storage, you continue to pay for electricity.

Consumer sentiment indicates storage is a necessity when installing solar. This is evidenced by many of our customers purchasing batteries with their new systems.

The critical next step is to choose the battery which gives you the most bang for your buck. Data shows the best savings can be had with the sonnenBatterie at the time of writing this article. The sonnenBatterie has the highest cycle rate at up to 2.7 cycles a day. This means the battery can charge and discharge completely almost 3 times in a 24 hour period when required. This gives you the maximum opportunity to use the most energy from your PV production.

sonnenBatterie is packaged with smart software which allows it to learn your usage patterns and adapt. This means if you use the most electricity between 9 and 11pm, the sonnenBatterie learns to reserve power for those hours, therefore providing you with free electricity when you need it the most. Competitor’s batteries simply charge and discharge at their maximum rates, with far less or no control. The sonnenBatterie allows for complete control of this process. This gives you the maximum electricity autonomy available on the market today of up to 75%.

To reach 100% (with a 90% average) energy autonomy, your best option is to buy a sonnenBatterie and join the sonnenFlat network. sonnenFlat allows sonnenBatterie customers to pay one flat monthly fee (approximately the same as your current daily connection fee) and gives you the energy you require each day when your PV and sonnenBatterie cannot account for your needs. sonnenFlat is not compatible with other battery brands.

The model is proven in Germany and is now available in Australia.

Energy autonomy should be at the forefront of your decision making process when purchasing a PV and battery storage solution. If the idea of never paying for electricity usage again appeals to you, sonnenFlat may be worth exploring further.

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1. The newly certified record conversion efficiency of 29.8 percent was set using a top cell made of gallium indium phosphide developed by NREL, and a bottom cell made of crystalline silicondeveloped by CSEM using silicon heterojunction technology. The two cells were made separately and then stacked by NREL. Martin A. Green et al. Solar cell efficiency tables (version 47), Progress in Photovoltaics: Research and Applications (2016). 

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