Yes, it is possible to connect solar panels (PV panels) directly to a home battery. This is often done in systems designed to store excess solar energy for later use.

How does a direct connection of PV panels to a home battery work?

To connect solar panels directly to a home battery, a DC-coupled configuration is used. In this setup:

1. Direct Current (DC):
   The solar panels generate electricity in the form of direct current (DC), which can be led directly to the home battery without conversion to alternating current (AC).

2. Combined inverter:
   A special hybrid inverter is used, which can both convert the direct current from the solar panels to alternating current for the house and send the direct current to the battery for storage.

3. Efficient energy transfer:
   Since the energy is not first converted to alternating current for the electricity grid and then back to direct current for the battery, energy loss is minimized.

Advantages of a direct connection

• Higher efficiency:
  Less energy loss by avoiding double conversion (DC → AC → DC).

• Cost savings:
  Since energy is stored and used locally, you save on network costs and reduce your dependence on the electricity grid.

• Self-sufficiency:
  You can store and use solar energy when needed, such as in the evening or during a power outage.

What should you pay attention to?

1. Suitable equipment:
   A hybrid inverter and compatible home battery are essential for safe and efficient operation.

2. Professional installation:
   The installation must comply with safety standards and regulations. Engaging a certified installer is crucial to prevent malfunctions and risks.

3. Energy management:
   A well-designed system can automatically prioritize between direct consumption, battery storage, and feed-in to the grid.

Alternative: AC-coupled systems

Besides a direct (DC-coupled) configuration, you can also choose an AC-coupled system. In this setup, the solar panels and the battery are connected independently via alternating current. This is more flexible but may be less efficient due to additional conversion losses.

Frequently Asked Questions

1. Is it necessary to use a special inverter when connecting solar panels to a home battery?
   Yes, for a direct connection of solar panels to a home battery, a hybrid inverter is required. This inverter converts direct current from the solar panels to alternating current for the house, while simultaneously sending the direct current to the battery for storage.

2. What are the benefits of a direct (DC-coupled) connection instead of an AC-coupled connection?
   The benefit of a DC-coupled connection is the higher efficiency. Since the energy is not first converted to alternating current and then back to direct current, energy loss is minimized, resulting in less loss of generated solar energy.

3. Can all home batteries be used in a directly connected system with PV panels?
   No, not all home batteries are compatible with a directly connected (DC-coupled) system. It is essential that the battery is suitable for this type of connection and that the correct equipment, such as a hybrid inverter, is used to efficiently store and manage the energy.

Directly connecting PV panels to a home battery via a DC-coupled system offers an efficient and future-proof solution for sustainable energy storage. Get advice from a professional installer to choose a system that suits your energy needs and goals.