How can you reduce the power consumption of IoT devices?

IoT devices have transformed modern offices into smart work environments, but they also present challenges when it comes to energy consumption. From smart sensors in the office environment to automated climate control, these devices run continuously and can account for a significant portion of your energy bill. The good news is that with the right approach, you can drastically reduce power consumption without sacrificing functionality.

In this article, you’ll discover which IoT devices consume the most energy, how to measure and optimize their energy usage, and what factors to consider when purchasing new equipment. With practical tips and insights, you’ll not only reduce your energy costs but also contribute to a more sustainable office environment.

Which IoT devices in the office consume the most energy?

The biggest energy consumers among IoT devices in the office are smart lighting systems, sensor-based climate control systems, security cameras, and network infrastructure such as routers and switches. These devices run 24/7 and can collectively account for up to 40% of the total energy consumption of office equipment.

Smart lighting systems are at the top of the list, especially when they are not properly configured. Although LED lighting is more energy-efficient than traditional lighting, the associated sensors, controllers, and wireless communication modules can increase overall energy consumption. An average office with 50 smart lights can consume an additional 200–300 kWh per month due to the supporting technology.

Climate control using IoT sensors is the second-largest source of energy consumption. Smart thermostats, air quality sensors, and automated ventilation systems constantly communicate with central systems. While these devices optimize the indoor climate, the sensors themselves continuously consume power for data collection and wireless communication.

Security cameras and access control systems operate continuously and often feature powerful processors for image processing and motion detection. A modern IP camera can consume 6–12 watts, which quickly adds up when multiple cameras are in use. Network infrastructure such as PoE switches that power these devices adds another 20–30% to that total.

How can you measure the power consumption of IoT devices?

The most effective way to measure the power consumption of IoT devices is by using smart energy meters, PoE monitoring tools, and specialized IoT energy management software. These tools provide real-time insights into consumption per device and help identify patterns that enable optimization.

Smart energy meters are the most direct way to measure energy consumption. You plug them in between the outlet and the device, and they record the exact energy usage. Modern energy meters often have Wi-Fi capabilities and can send data to an app or dashboard. For IoT devices powered via Power over Ethernet (PoE), managed switches provide detailed usage statistics for each port.

Professional IoT energy management software provides the most comprehensive insights. These systems not only monitor energy consumption but also analyze usage patterns, identify inefficiencies, and suggest automatic optimizations. They can distinguish between active usage and standby consumption, which is crucial for identifying opportunities for savings.

For a comprehensive analysis, it is important to monitor both individual devices and the entire network. Network infrastructure such as routers and switches often consumes more energy than the connected IoT devices themselves. By measuring total energy consumption and comparing it to the sum of the individual devices, you can gain insight into your network’s overhead.

Which energy-saving settings are most effective for IoT devices?

The most effective energy-saving measures for IoT devices include optimizing communication intervals, implementing sleep modes, reducing transmission power, and utilizing edge computing. These measures can reduce energy consumption by 30–60% without compromising functionality.

Adjusting communication intervals often yields the greatest savings. Many IoT devices are set by default to send data every few seconds, even though this isn’t necessary for most applications. By setting sensors to report every 5–15 minutes instead of monitoring continuously, you can significantly reduce energy consumption. For temperature and air quality sensors, this is usually more than enough.

Sleep modes are essential for devices that do not need to be active all the time. For example, motion sensors can enter a deep sleep mode and only activate when motion is detected. Smart lighting controllers can shut down their processors between commands. These settings can reduce standby power consumption by 70–90%.

Reducing transmission power is particularly effective in offices with good network coverage. Many devices transmit at maximum power by default, even though a lower power setting is often sufficient for stable communication. This is especially relevant for Wi-Fi and Zigbee devices. Edge computing, in which data is processed locally rather than sent to the cloud, reduces both network traffic and the energy consumption of central systems.

What is the difference between wireless and wired IoT devices in terms of energy consumption?

Wired IoT devices generally consume 20–40% less energy than wireless devices, as they do not need to expend energy on wireless communication and battery management. Wireless devices, on the other hand, offer greater flexibility in placement and can optimize their energy consumption through smart protocols.

Wired devices, especially those powered via Power over Ethernet (PoE), have predictable and stable power consumption. They do not need to expend energy maintaining wireless connections, searching for networks, or managing batteries. A wired sensor typically consumes 2–5 watts, while a comparable wireless sensor can consume 3–8 watts due to the communication module.

However, wireless devices offer advantages that can offset their higher energy consumption. Modern wireless protocols such as Zigbee 3.0, LoRaWAN, and Thread are optimized for low energy consumption. These protocols use mesh networks in which devices act as repeaters, which increases overall network efficiency. Battery-powered sensors can last for years thanks to the use of ultra-low-power chips and intelligent sleep modes.

The choice between wireless and wired depends on the specific application and location. For fixed installations such as lighting control and climate control, wired solutions are often more energy-efficient. For flexible applications such as desk booking sensors and temporary monitoring, wireless solutions offer more advantages, despite their slightly higher energy consumption.

How do you choose energy-efficient IoT devices for your office?

When choosing energy-efficient IoT devices for your office, look for ENERGY STAR certification, low-power protocols such as Zigbee or Thread, devices with configurable sleep modes, and edge computing capabilities. These criteria will help you select devices that consume up to 50% less energy than standard alternatives.

ENERGY STAR certification is a reliable indicator of energy-efficient IoT devices. This certification guarantees that devices meet strict efficiency standards and often consume 20–30% less energy than non-certified alternatives. Also look for devices with EPA approval and other recognized sustainability certifications.

The communication protocol has a significant impact on energy consumption. Zigbee 3.0 and Thread are specifically designed for low energy consumption and can keep devices running on batteries for years. Wi-Fi 6 offers improvements for IoT applications, but generally remains more energy-intensive. LoRaWAN is ideal for sensors that transmit small amounts of data over long distances.

Choose devices with extensive configuration options for energy management. The best IoT devices let you adjust reporting intervals, configure sleep modes, and set transmission power. Devices with edge computing capabilities can process data locally, which reduces network traffic and cloud costs. Also consider the total lifecycle: sustainable devices with longer warranties are often designed to be more energy-efficient and save more energy and costs in the long run.

How Wout Monseurs Helps with Energy-Efficient Smart Office Solutions

We help companies drastically reduce their energy consumption with smart, integrated Smart Office solutions that are perfectly tailored to your specific office environment. Our expertise in Smart Office technology combines energy-efficient IoT devices with intelligent automation to maximize efficiency.

Our Smart Office solutions include:

• Energy-efficient lighting systems with sensors that deliver savings of up to 90%
• Smart climate control that automatically optimizes based on occupancy
• Integrated desk booking systems for efficient use of space
• Real-time monitoring of energy consumption by zone and device
• Preventive maintenance and optimization of all systems

As a full-service project designer, we ensure seamless integration between your office design and Smart Office technology. From the initial design to completion, we handle everything so you can focus on your core business, while we help reduce your energy costs and increase employee satisfaction.

Discover how our sustainable Smart Office solutions can transform your office. Contact us for a no-obligation consultation and explore the possibilities for your organization.