During the summer months, residential solar energy production reaches its peak. However, this energy bonanza does not always translate into real savings. Many homes that have invested in solar panels continue to lose part of the value generated, mainly because they do not consume the energy at the time it is produced. At Walter Haus, based on our experience with high energy performance homes, we insist on the importance of accompanying solar production with intelligent self-consumption strategies. Otherwise, up to 55% of the energy produced may end up being exported to the grid at a much lower price than the price paid later for the energy purchased.
Why without a battery you lose value
When a solar installation does not include a storage system, much of the energy generated during sunny hours is automatically injected into the electrical grid. In Spain, this excess energy is compensated at very low prices, while electricity consumed later—when there is no longer any sun—is paid much more expensively. According to our calculations, a home with a 4 kWp installation can lose between €130 and €220 during the summer months if it does not have a battery. On the other hand, a domestic battery allows you to store unused energy during the day to consume it at night, increasing the percentage of self-consumption up to 75% and ensuring substantial savings. This difference can represent more than €100 per season.
How to optimize solar self-consumption
The profitability of a solar installation depends not only on how much energy you generate, but on how and when you use it. To maximize savings, at Walter Haus we recommend applying smart consumption practices, such as moving the use of appliances to the hours of greatest solar radiation, adjusting the operation of the air conditioning or heating at midday, or implementing an energy management system (HEMS). These types of automated systems can coordinate the operation of devices based on solar production and market prices, eliminating waste and improving overall home efficiency.
Size your installation well and think long term
An oversized installation does not guarantee greater savings if you do not have the appropriate tools to retain or use that energy. It is essential to adapt the number of solar panels to the daily consumption profile and take into account the possibility of incorporating batteries in the near future. At Walter Haus, we work with personalized solutions that balance installed power, energy needs and long-term projection. In this way, we help our clients achieve more profitable management of their home and protect their investment with solid technical and financial criteria.
Solar energy as added value to your property
In addition to the direct economic benefits, a well-managed solar installation increases the value of a home. More and more buyers value energy efficiency as a key criterion when choosing a property. From our vision as real estate experts, we know that a house with well-optimized self-consumption systems not only reduces energy bills, but also stands out in the market. At Walter Haus, we integrate this type of innovations into our value propositions, convinced that sustainability and profitability must go hand in hand in the luxury residential sector. Summer offers a unique opportunity to make the most of solar energy. But without the right tools, that potential can easily be diluted. At Walter Haus we help our clients understand and make the most of their investment in solar energy, applying a global approach that combines efficiency, savings and real estate revaluation. Betting on intelligent energy management is betting on a more valuable, more autonomous and future-ready home.