FEMS App
grid-optimized charging
Home & Commercial
FEMS App
grid-optimized
Charging
home & Commercial
The FEMS App Grid-Optimized Charging ensures intelligent charging of your Energy Storage System while at the same time reducing the load on the power grid. The application is already included free of charge with every FENECON Energy Storage System.
The FEMS App Grid-Optimized Charging ensures intelligent charging of your Energy Storage System while at the same time reducing the load on the power grid. The application is already included free of charge with every FENECON Energy Storage System.
Benefits
Durable
Grid-friendly charging optimizes the charging of your energy storage system across the entire day.
This ensures particularly gentle charging and can extend the lifetime of the system by up to 2 years
Economical
Your storage system is operated proactively: in the early morning hours it is intentionally kept empty so it can absorb the full PV output at midday.
This helps you avoid feed-in losses and allows you to use your own energy as efficiently as possible.
Sustainable
With grid-friendly charging, you actively support the energy transition. Your storage system eases the strain on the power grid by intelligently absorbing energy instead of feeding it in uncontrollably.
Key Facts
01
Intelligent & Award-Winning Charging
Your energy storage system charges automatically whenever surplus PV energy is available – not simply according to a fixed schedule, but based on actual demand and the current grid situation. In its annual “Stromspeicher-Inspektion 2025”, HTW Berlin evaluated a wide range of forecast-based energy management systems.
The result: FEMS is the test winner, achieving the lowest curtailment losses of all systems tested!
02
Always Included
The FEMS App Grid-Optimized Charging Home & Commercial is free of charge and already included in the standard scope of delivery of your FENECON system.
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.
To the FEMS Extension Apps
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.
"My storage system used to be full early in the morning – now it charges exactly when the sun delivers real power. This way, I avoid curtailment by the grid operator, make optimal use of my PV system, and support the grid at the same time."
FAQ
The app is currently compatible with all common models of the FENECON Home and Commercial series – and it comes pre-installed.
The FEMS App is already included in the standard delivery scope of your FENECON energy storage system and can be used free of charge.
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.
While conventional storage systems often only begin feeding energy into the grid once they are fully charged — adding extra load to the grid around midday — the FEMS App Grid-Supportive Charging takes a smarter approach. It distributes energy feed-in evenly throughout the day, helping to maintain a stable grid and ensuring efficient system operation. This is also beneficial for your wallet: your storage system fills up during times when other systems are being curtailed, allowing you to make optimal use of your solar energy instead of losing it.
