How to Manage Home Energy Smartly: A Comprehensive Guide for Homeowners

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As the world gradually transitions towards sustainable energy sources, energy management has become increasingly crucial in today’s society. The emergence of home energy management systems (HEMS) provides homeowners with a more intelligent and efficient way to utilize energy.

What is a Home Energy Management System?

A home energy management system is a system that monitors, controls and optimizes home energy usage through intelligent technology. It includes features such as energy consumption measurement, automation control, and networked control. Its purpose is to assist homeowners in effectively managing energy consumption, thereby reducing energy costs and improving energy utilization efficiency. Especially in the current context of energy transition, with a growing demand for renewable energy sources, smart home energy management systems become a key force in driving energy intelligence.

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What are the Typical Components of a Home Energy Management System?

Photovoltaic (PV) Power System: To make intelligent management of home energy while achieving grid independence, a PV power system is an indispensable component. Common types include rooftop and balcony PV systems. Solar panels and inverters are used to convert solar energy into electricity to meet the operational consumption of household loads.

Energy Storage System: It stores excess solar energy during sunny periods for use as backup power during power outages or cloudy weather.

Heat Pump: An efficient heating device increasingly popular for integration with PV systems. It can utilize clean energy for heating and consumes surplus energy.

Electric Vehicle (EV) Charger: It can charge electric vehicles during periods of high PV system generation for later use.

Energy Management Devices: It not only measures real-time power consumption of different household loads and the power generated by the PV system but also dynamically allocates load power based on real-time status and homeowner preferences.

Household Loads: Home appliances such as water heaters or refrigerators can be intelligently controlled to optimize their power consumption.

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How Does the Home Energy Management System Operate?

To be short, energy management devices continuously measure the power of the PV system and household loads in real-time and intelligently adjust power consumption. In the example of a home grid integrated with a PV power system, on a sunny day with surplus PV power, the home energy management system increases the power consumption of household loads like heat pumps, initiates charging of electric vehicles or energy storage systems to utilize the excess electricity and avoid wastage. However, on cloudy days, when the PV system produces insufficient power to support household consumption, energy management devices appropriately introduce power from the grid or energy storage systems to meet daily load operations while minimizing unnecessary electricity use, such as from EV chargers.


What Are the Advantages of a Home Energy Management System?

Reducing Energy Costs

The integration of residential energy management systems with photovoltaic systems allows households to flexibly utilize self-generated electricity, covering their energy needs efficiently. Through intelligent control and energy storage in the form of heat or EV charging for later use, lower electricity costs are realized.

Improving Energy Utilization Efficiency

Home energy management systems achieve comprehensive energy utilization by integrated management of various households and photovoltaic systems. By strategically arranging solar power, load consumption, and energy storage, the system ensures efficient energy utilization, avoiding losses caused by excess electricity flowing into the grid and increasing overall energy utilization efficiency.

Energy Conservation and Emission Reduction

Through energy monitoring and optimization, home energy management systems enable homeowners to precisely understand and control energy usage. Regular data analysis and smart control allow the system to identify potential energy waste, assisting homeowners in taking effective measures and contributing to energy conservation and emission reduction goals.

Intelligent Living Experience

Through mobile applications or online platforms, users can view real-time energy data, adjust device settings, and control home energy, enhancing the comfort and convenience of home life.


EVB’s Smart Energy Management Solutions

The HEMS is specifically designed for intelligent energy management. This system is suitable for integration with home grids equipped with photovoltaic power systems, consisting of BEMS measuring devices and BEMC control devices.

BEMS measuring device: Installed in the household distribution box, measuring real-time electricity generated by the photovoltaic power system and controlling the BEMC for adjustment. BEMC control device: Installed on the load side, measuring and adjusting the power of connected loads, such as water heaters and heat pumps.

The collaboration between these two types of devices provides a series of smart features:

*Various energy modes: For example, under the household priority mode, the system will dynamically adjust other power consumption to prioritize the household electricity needs. In addition, the BOOST input and MODE input on the BEMS measuring device allows users to force open or close boost mode and switch between winter and summer modes according to their settings.

*Perfect integration with EVB chargers: When the electricity generated by the PV system exceeds the household load, the system collaborates with the EVB chargers to increase the charging power, supporting commuting and travel.

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*Three-phase measuring: It can measure the voltage and current of three phases, which enables independent adjustment of power for each phase.

*Bluetooth or Wi-Fi connectivity: The BEMS measuring device can connect to a smartphone app via Bluetooth or Wi-Fi, allowing users to customize system parameters, view energy flow, and access historical energy-saving records, achieving personalized intelligent management.

*Enhancing security: Both the BEMS measuring device and BEMC control device are equipped with built-in safety fuses and isolated power supplies. They are also equipped with surge protection devices and other safety components to prevent equipment damage from grid fluctuations.

*Data safety: The EVB server is located on AWS, ensuring the security of customer data.

In the era of energy transition, the advantages of energy management systems lie not only in improving energy efficiency but also in providing households with a sustainable and intelligent approach to energy management at home. Through the rational integration of photovoltaic systems, and achieving self-consumption, households can contribute individually to the goals of sustainable development, becoming active participants in the energy transition.

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