FEMS App
time-of-use tariff
FEMS App
time-of-use tariff
The FEMS App Time-of-use Tariff analyses future electricity prices and grid fees and automatically plans your residual grid consumption for the cheapest times. Using artificial intelligence, FEMS creates an individual energy schedule — based on local weather data, PV generation and your consumption patterns.
The FEMS App Time-of-use Tariff analyses future electricity prices and grid fees and automatically plans your residual grid consumption for the cheapest times. Using artificial intelligence, FEMS creates an individual energy schedule — based on local weather data, PV generation and your consumption patterns.
Benefits
Flexible & Independent
With FENECON, you enjoy full freedom in choosing your electricity provider. While many other storage systems are tied to a specific supplier, you decide freely with FENECON. This keeps you flexible and able to secure the best offer at any time.
Cost-Effective
When cloudy days or the winter season reduce your PV production and it is no longer sufficient to power all your loads, one thing becomes especially important: sourcing the residual electricity as intelligently and cheaply as possible.
This is exactly where the FEMS Dynamic Tariff App steps in. It smartly manages grid electricity purchases and consumption, helping you significantly reduce your energy costs.
Sustainable
By intelligently shifting electricity purchases and consumption to periods with low prices, the system makes use of times when grid fees are low, renewable energy is abundant, and demand is minimal. This relieves the grid and helps advance the energy transition sustainably.
Key Facts
01
Buy electricity at the best price
Buy and store electricity in the exact amount you will need in the future – precisely when it's cheap – for maximum savings and efficiency.
02
One-time purchase instead of a subscription
No hidden-cost subscription model: you purchase the FEMS App once and use it permanently without any ongoing costs
03
Lifetime Free Updates & Support
Benefit from continuous improvements and personal support — directly from our developers and service staff in Germany.
For everyone who wants
to know all the details!
Here you will find all technical details and operating manuals for our FEMS Apps – compact, transparent, and always up to date.
FEMS
Energy Storage System, inverter and energy management — perfectly matched and always included.
Its your Energy Journey
Our award-winning Open-EMS energy management system FEMS is included with every Energy Storage System. FEMS intelligently controls, monitors and optimises your energy flows – autonomously without an internet connection if desired, or by default via our secure FENECON servers in Germany. Developed by teams in Bavaria – naturally according to the highest data protection standards.
Included
Via online monitoring in your browser or through the app (Android & iOS), you can keep an eye on your energy at any time. Live data, clear analytics, and locally stored history provide full transparency. Your data is always protected through cyber security by design, German-based servers, and a development team located in Germany — naturally in accordance with German data protection and IT security standards.
1.
Growing With You
Your life changes – and your energy system grows with it. Thanks to FEMS, your storage system remains open for anything the future brings: new devices, new ideas, new possibilities. And all of this without lock-in, without subscriptions, without artificial limitations. Instead, you get lifelong, free updates that keep your system always up to date.
Through optional, one-time purchasable FEMS Extension Apps, you can expand your system at any time – for example with charging stations, heating rods, or other consumers. This turns your storage into a customized energy system that perfectly fits your everyday life – not something off the shelf. Thanks to the manufacturer-independent open-source approach, you remain completely free in choosing your components. FEMS grows with you – because true independence only works when systems stay open.
2.
Thinking Ahead
FEMS ensures that your energy doesn’t just “run” – it adapts to your life. It acts intelligently, proactively and independently. Using AI-based forecasting, FEMS creates a holistic, customised energy plan for your needs, updating it every minute and incorporating all relevant factors.
FEMS analyses weather data, consumption profiles, tariffs and grid conditions in real time and makes forward-looking decisions that intelligently control your energy flows. The result: you save costs, conserve resources and reduce strain on the power grid at the same time.
3.
"With the FEMS App Time-of-use Tariff, I purchase electricity at the most cost-effective times based on dynamic price schedules, optimizing my energy usage and saving money."
FAQ
Time-of-use tariffs adjust adjust every quarter-hour based on current market prices. This means you pay less when more renewable energy is available. A short, clear explanation can be found in our video on YouTube.
For FEMS Extension Apps, please contact the specialist partner or installer from whom you purchased your storage system for pricing and ordering information.
Our home and commercial storage systems are sold exclusively through wholesalers and certified specialist partners.
