Full modernization does not necessarily mean energy renovation, but energy renovation is often a key component of modernization efforts. Energy renovation involves upgrading a building's energy systems to be more efficient and sustainable, which can be a crucial aspect of modernizing a structure. By incorporating energy renovation into the modernization process, buildings can become more environmentally friendly, cost-effective, and comfortable for occupants. **

Renewable energy generates electricity. Renewable energy sources such as solar, wind, hydro, and geothermal power are used to generate electricity through various technologies. For example, solar panels convert sunlight into electricity, wind turbines harness the power of the wind to generate electricity, and hydroelectric power plants use the energy of flowing water to produce electricity. Therefore, renewable energy is a key source of electricity generation that can help reduce reliance on fossil fuels and mitigate climate change. **

Core renovation is not the same as renovation. Core renovation typically refers to the major structural and foundational changes to a building, such as replacing the electrical and plumbing systems, updating the HVAC system, or making significant structural modifications. Renovation, on the other hand, can encompass a wide range of improvements, from cosmetic updates like painting and flooring to more extensive changes like adding new fixtures or appliances. While core renovation is a subset of renovation, it specifically focuses on the essential systems and structure of a building. **

Electricity costs during a renovation are typically calculated based on the amount of electricity consumed during the project. This can be determined by tracking the usage through the existing electrical meter or by using a temporary meter specifically for the renovation. The cost is then calculated by multiplying the total amount of electricity used by the applicable rate charged by the utility provider. It is important to accurately track and account for these costs to ensure they are included in the overall budget for the renovation project. **

During a renovation, electricity costs are typically billed based on the amount of electricity consumed during the construction period. This can be calculated by monitoring the usage through a separate meter installed specifically for the renovation project. The electricity costs incurred during the renovation are usually the responsibility of the homeowner or the contractor overseeing the project. It is important to factor in these costs when budgeting for the renovation project. **

Electricity from renewable energy sources has become increasingly competitive in terms of cost, and in many cases, it is now cheaper than electricity from traditional sources such as coal or natural gas. The cost of renewable energy technologies like solar and wind power has been steadily decreasing, making them more affordable and cost-competitive. Additionally, the long-term costs of renewable energy are often lower due to the lack of fuel costs and the potential for lower maintenance expenses. As a result, many regions are now seeing renewable energy as a cost-effective option for electricity generation. **

In 2020, renewable energy sources made up 46.3% of electricity generation in Germany. This is a significant increase from previous years and reflects the country's commitment to transitioning towards a more sustainable energy system. Renewable energy sources such as wind, solar, and biomass have played a key role in reducing Germany's reliance on fossil fuels and lowering carbon emissions in the electricity sector. **

House renovation and energy consulting require different skill sets. For house renovation, a contractor or builder with experience in construction and design would be better suited, as they can handle the physical aspects of the renovation such as structural changes, plumbing, and electrical work. On the other hand, for energy consulting, an expert in energy efficiency and sustainable design would be more suitable, as they can provide guidance on reducing energy consumption, improving insulation, and integrating renewable energy sources. It's important to find professionals with the right expertise for each specific aspect of the project. **