Consumer

Karel Kalma increases self-consumption with a Taylor battery and Taylor Energy Manager.

33% less grid electricity in one year, with battery storage and smart control of self-generated energy.

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Logo Bozon Eindhoven

Installer

Bozon Eindhoven

Year

2025

INSTALLED PRODUCTS

Taylor solar panels Taylor battery first installation 5,6 kWh in may 2025 Increased Taylor battery storage to 11,2 kWh in october 2025 Taylor Energy Manager

Measurably lower grid consumption through smart energy management.

In 2019, Karel Kalma had solar panels installed on his home in Eindhoven. His goal was to generate his own energy and reduce dependence on the grid. The installation was carried out by Bozon Eindhoven. According to Karel, the advisory process was clear and well structured. The available roof space, shading from a neighbour’s dormer and the optimal layout of 13 panels were all taken into account. “It was clearly explained what was and wasn’t possible. That immediately gave confidence.” The system performed well. During the day, he used his own electricity. In the evening, energy came from the grid. As feed-in became less financially attractive and regulations changed, he wanted to take the next step: increasing self-consumption.

In 2019, Karel Kalma had solar panels installed on his home in Eindhoven. His goal was to generate his own energy and reduce dependence on the grid. The installation was carried out by Bozon Eindhoven. According to Karel, the advisory process was clear and well structured. The available roof space, shading from a neighbour’s dormer and the optimal layout of 13 panels were all taken into account. “It was clearly explained what was and wasn’t possible. That immediately gave confidence.” The system performed well. During the day, he used his own electricity. In the evening, energy came from the grid. As feed-in became less financially attractive and regulations changed, he wanted to take the next step: increasing self-consumption.

Expansion with battery storage 

In May 2025, two battery modules were installed, providing 5.6 kWh of storage capacity. In October, this was expanded to a total of 11.2 kWh. The investment was made in phases, with the goal of using as much self-generated energy as possible and reducing reliance on the grid. 

“If you consume electricity, you pay. If you feed it back, you also pay. Then I’d rather store it myself.” 

The impact was immediately visible in the numbers: 

2024: 2100 kWh grid import 
2025: 1400 kWh grid import 

That is a reduction of 700 kWh, around 33 percent, while the system had not yet operated a full year at maximum capacity. In 2026, the system will run a full year with 11.2 kWh storage. 

According to Karel, feed-in on sunny days has dropped significantly. Energy is stored first and used later, reducing grid consumption and making optimal use of battery capacity. 

Why Taylor 

The battery solution was supplied by Taylor. The decision was based on capacity, flexibility, expandability and the fact that it is a local company. 

For a similar investment, the system offered more storage capacity than alternatives. Another important factor for Karel was flexibility in energy management. 

“With other systems, you have to decide upfront whether you want to trade. Now I can adjust that whenever I want.” 

For him, self-consumption is the priority. Trading on the energy market is something he is exploring, but the system must first work logically for daily household use. 

Insight that changes behaviour 

According to Karel, the biggest change is insight and awareness. 

Through the app, he can see how much energy is generated, when the battery charges or discharges, and how much is imported or fed back. The effect of dynamic energy prices is also directly visible. 

“Before, it was just: this is the yield. Now I look at whether I can get through the day on my own energy.” 

This insight influences daily decisions. Appliances are used more often when solar production is available or when tariffs are low. Energy use becomes more deliberate, and battery capacity is taken into account in planning. 

As a result, the system not only makes technical sense, but is also easy to understand in daily use. 

Installation and reliability 

The battery system was installed in the attic, directly below where the cabling enters the home. This made the installation straightforward. 

In case of a grid outage, the system automatically switches to battery power for connected devices, which adds an extra layer of security. 

Data is stored on European servers, which Karel considers important for reliability and data security. 

The role of Bozon Eindhoven 

Karel spoke to multiple installers beforehand. Bozon Eindhoven stood out with clear explanations of both possibilities and limitations. 

“The advice was transparent and realistic. That gave the best feeling.” 

The battery expansion was aligned with the existing system and future plans. By investing in phases, the system remains logical and ready for further optimisation. 

Result 

The combination of solar panels, battery storage and smart energy management has already delivered clear results, even without a full year at maximum capacity: 

  • 700 kWh less grid import

  • Significantly reduced feed-in

  • Higher self-consumption

  • More insight and control over energy use

  • Flexibility in energy management

Karel would approach the project the same way again with Bozon Eindhoven and Taylor. 

Anyone who wants to understand what increasing self-consumption means in their own situation can have it calculated by a local installer.