FoxESS fixed price packages

Complete inverter and energy storage packages at a fixed price, without compromise

The solar panel market has undergone significant changes in recent years: the focus is now not only on energy production, but also on conscious energy use and storage. Fixed-price inverter and energy storage packages represent precisely this new approach. They offer pre-assembled, technically compatible systems that make installation faster, cost planning more transparent, and operation safer.

These packages are based on hybrid inverters and state-of-the-art LiFePO₄ battery energy storage, enabling the use of generated solar energy on site, optimising peak consumption and reducing grid dependency. The system automatically manages the flow of energy between the solar panels, the battery, and the grid, ensuring maximum self-consumption.

The fixed-price structure is particularly advantageous for installers and contractors, as it simplifies the quotation process and minimizes compatibility risks. At the same time, it also offers clear benefits for end users: predictable investment costs, reliable manufacturer support, and long-term stable energy management.

If you are looking for an uncompromising yet predictable energy storage solution, the complete fixed-price inverter + battery packages are a professionally sound and future-proof choice.

Why choose a hybrid inverter in a fixed-price energy storage package?

The hybrid inverter can simultaneously handle the direct current from the solar panels, the grid connection, and the energy storage battery. This means that the system automatically optimizes the energy flow between production, consumption, and storage.

With a fixed-price package, compatibility issues are already resolved in advance. There is no need to plan separate inverter-battery matching or check firmware compatibility. The system operates within a single manufacturer's ecosystem, resulting in more stable communication and more reliable operation.

An additional advantage is that such packages are typically modularly expandable, so that storage capacity can be scaled later if the customer's energy needs increase.

How much capacity does my energy storage system need?

The required capacity depends primarily on annual consumption, the daily load curve, and the goal of optimizing the self-consumption ratio.

For residential systems, it can generally be said that:

• a smaller storage capacity of around 5-8 kWh is sufficient to cover evening consumption,
  
  

• a capacity of 10–15 kWh significantly increases the self-sufficiency ratio,
  
  

• for larger, three-phase systems, a storage capacity of more than 15 kWh may be justified.

From an installer's point of view, it is important to consider the nominal power of the inverter, the discharge power of the battery, and the possibility of parallel connection. For this reason, fixed-price packages are available in different power and capacity levels.

Who should invest in a fixed-price home inverter + energy storage package?

Such a package is an ideal choice:

• when installing a new solar panel system,
  
  

• when expanding an existing solar system with energy storage,
  
  

• in areas affected by grid restrictions,
  
  

• for households with high evening or nighttime consumption,
  
  

• for users seeking partial energy independence.

It is particularly advantageous for installation companies because it provides a standardized system structure, reduces technical design time, and speeds up the handover process.

How do these packages fit into the OEP scheme?

During the OEP period , hybrid inverter systems that are supplemented with energy storage are coming to the fore, as they are capable of managing the differences between production peaks and consumption demands.

Fixed-price inverter + battery packages represent a pre-validated, technically compatible system structure, which enables safer design and faster implementation within the OEP framework.

Both Deye and SolaX-based packages can be configured to meet the technical and performance requirements of the OEP. Different performance and capacity levels allow for the design of a system that fits the given tender framework and consumption profile.

Is there a difference in capacity between the Deye and SolaX fixed-price packages?

The differences between the packages are mainly in the inverter power, the number of phases, and the modular expandability of the energy storage.

Three-phase systems typically have higher power and can be optimized for higher battery capacity, while single-phase systems are a cost-effective solution for properties with lower consumption.

Systems from different manufacturers may differ in terms of

• maximum expandable battery module count,
  
  

• nominal discharge power,
  
  

• communication and monitoring options,
  
  

• support for backup/EPS functions.
  
  

The right choice in each case depends on the technical parameters of the project and the intended use.