Energy Management for Photovoltaic Systems – How it Works
Why energy management is important for photovoltaics Photovoltaic systems produce electricity depending on solar radiation.Often, there is a surplu...
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PV & Speicher
The Energy Transition at Home: The Ultimate Guide to Photovoltaics, Heat Pumps, and Smart Energy Management
The Evolution of the Home: Why an Energy Management System is Becoming Indispensable
The energy transition is fundamentally changing the way we consume energy at home. A HEMS – the intelligent energy management system for your home – acts as a digital brain that seamlessly connects various energy sources and consumers such as photovoltaics, heat pumps, and wallboxes. Through precise analysis of electricity production and household consumption, the system ensures that the generated energy is used with maximum efficiency. This is one of the central advantages of an energy management system in the home.
But what exactly is a HEMS? The HEMS definition (Home Energy Management System) essentially describes an energy management software and hardware combination that orchestrates the interplay of all electricity sectors in a building. Whether it's about the self-consumption of a photovoltaic system, surplus charging of an electric car, or the integration of dynamic tariffs – the HEMS is the control center.
Sector Coupling and the Smart Energy Home Concept
In a modern Smart Energy Home, automated controls and smart meters work together to make households drastically more independent of fluctuating electricity prices. A key lever here is to optimize household electricity consumption by specifically controlling typical large consumers.
This is referred to as sector coupling. The definition of sector coupling in the home sector includes the intelligent connection of power generation (photovoltaics), mobility (wallbox), and heat (heat pump, heating rod). Intelligent control of the PV system, for example, directs surplus energy directly into a battery storage system or an electric car at midday. This is particularly effective and profitable through professional energy management for photovoltaic systems.
Optimal coordination of photovoltaics, wallbox, and surplus charging
Anyone operating a photovoltaic system with storage wants to draw as little electricity as possible from the grid. A controllable wallbox is crucial here. Many users look for a reliable wallbox control app or rely on open-source solutions. Terms like EVCC Wallbox, EVCC io, or Home Assistant often come up. While tech-savvy users occupy themselves with EVCC Docker, the EVCC Raspberry setup, or editing an EVCC Yaml, most homeowners are looking for a turnkey solution that works immediately – without any EVCC configuration or programming knowledge.
Dynamic Electricity Tariffs and the § 14a EnWG Obligation
The energy market is changing. With the dynamic electricity tariff obligation in 2025 in mind, it is becoming increasingly lucrative for consumers to purchase energy when it is cheap on the exchange – often at night or during strong winds. Dynamic electricity tariff providers like Tibber or Awattar are leading the way. Those who want to use the best dynamic electricity tariffs need an energy management system that can process this price data (forecast).
At the same time, Paragraph 9 EEG and § 14a EnWG bring new requirements. Operators of a 14a wallbox or heat pump must enable grid-oriented control by the network operator, but in return benefit from a reduction in grid fees. An advanced system like the HEMS PRO fully automatically and legally compliant (including 14a Module 2) controls this wallbox control for the network operator.
Energy Management Compared: With vs. Without HEMS PRO
Before investing in a photovoltaic system or looking for an energy management system test, you should weigh the cost factors and added value. Electricity costs are not reduced by solar modules alone, but by intelligent distribution.
Classic Setup (Without HEMS)
- Surplus PV electricity is often fed into the grid unused for a low feed-in tariff.
- Electric cars are charged even when electricity prices are at their highest.
- No automatic reaction to dynamic electricity tariffs.
- Requirements for § 14a EnWG can only be met with difficulty or with multiple isolated solutions.
- Complex DIY solutions (Raspberry, constant updates, editing Yaml) waste time.
Smart Energy Home with HEMS PRO
- Maximum self-consumption through intelligent PV surplus charging (wallbox & heat pump).
- Automatic charging at the cheapest times thanks to the integration of dynamic electricity tariffs.
- Full compatibility and legally compliant implementation of § 14a EnWG control (network operator).
- True sector coupling from a single source – without complex programming.
- Local, secure data processing without cloud dependency.
HEMS PRO: The Professional Solution for Your Energy Independence
If you want to buy a HEMS that is future-proof, manufacturer-independent, and easy to use, there's no getting around the HEMS PRO. Instead of having to maintain various isolated solutions or complex open-source projects, this device bundles all functions. Whether you want to use interfaces like Modbus Proxy, EEBUS, OCPP, or integrate your inverters from Sungrow, Victron, or components from Shelly – the HEMS PRO offers the necessary architecture.
Discover the HEMS PRO
Turn your PV system, wallbox, and heat pump into a true Smart Energy Home. Benefit from dynamic tariffs starting in 2025 and effortlessly meet the § 14a EnWG requirements.
View HEMS PRO nowFuture-proofing and Economic Efficiency
An efficient energy management system is no longer a gimmick, but an economic necessity. The experts at Awatt Electronic have created a solution with the HEMS PRO that bridges the gap between professional energy management in companies or industry and easy usability in private households. Sustainably reduce your electricity costs, become independent of fossil fuels, and utilize the full potential of your home solar energy.
Do you have questions about the compatibility of your existing photovoltaic system or are you looking for individual advice on surplus charging and § 14a EnWG? Please contact us directly – we will support you on your path to energy independence.
