How a European Hotel is Cutting Costs and Embracing Green Energy with RENAC's C&I ESS

With energy prices climbing and the push for sustainability growing stronger, a hotel in the Czech Republic was facing two major challenges: soaring electricity costs and unreliable power from the grid. Turning to RENAC Energy for help, the hotel adopted a custom Solar+Storage solution that's now powering its operations more efficiently and sustainably. The solution? Two RENA1000 C&I All-in-one?Energy Storage Systems paired with two?STS100 Cabinets.

Reliable Power for a Busy Hotel

This hotel's proximity to the ?koda factory puts it in a high-demand energy zone. Important loads in the hotel like freezers and critical lighting rely on a stable power supply. To manage rising energy costs and mitigate risks of power outages, the hotel invested in two RENA1000?systems and two?STS100?cabinets, creating a 100kW/208kWh energy storage solution that backs up the grid with a reliable, green alternative.

Smart Solar+Storage for a Sustainable Future

The highlight of this installation is the RENA1000 C&I All-in-one Hybrid ESS. It's not just about energy storage—it's a smart microgrid that seamlessly combines solar power, battery storage, grid connection, and intelligent management.

Equipped with a 50kW hybrid inverter and a 104.4kWh battery cabinet, the system can handle up to 75kW of solar input with a maximum DC voltage of 1000Vdc. It features three MPPTs and six PV string inputs, each MPPT designed to manage up to 36A of current and withstand short-circuit currents up to 40A—ensuring efficient energy capture.

With the help of STS Cabinet, when the grid fails, the system can automatically switch to off-grid mode in less than 20ms, keeping everything running without a hitch. The STS?cabinet includes a 100kW?STS?module, 100kVA isolation transformer, and microgrid controller,?and power distribution part,?effortlessly managing the shift between grid and stored energy. For added flexibility, the system?can also connect to a diesel generator, offering a backup energy source when needed.

What sets the RENA1000 apart is its built-in Smart EMS (Energy Management System). This system supports multiple operation modes, including timing mode,?self-use mode, dynamic expansion?of transformer mode, backup mode, zero export, and demand management. Whether the system is operating on-grid or off-grid, Smart EMS ensures seamless transitions and optimal energy use.

Additionally,?RENAC's smart monitoring platform is designed for various energy systems, including on-grid?PV systems, residential energy storage?systems, C&I energy storage systems?and EV charging stations. It offers centralized, real-time monitoring and management, intelligent operation and maintenance, and features such as revenue calculation and data export.

This?project's real-time monitoring platform provides the following data:

The RENA1000 energy storage system is more than just harnessing solar power—it adapts to the hotel's needs, ensuring reliable, uninterrupted energy while reducing dependence on traditional power sources.

Financial Savings and Environmental Impact in One

This system does more than just keep the power on—it's also saving the hotel money and helping the environment. With an estimated annual savings of €12,101?in energy costs, the hotel is on track to recover its investment in just three years. On the environmental front, the SO??and CO??emissions cut by the system are equivalent to planting hundreds of trees.

The RENAC's C&I energy storage solution with RENA1000?has helped this hotel take a big step toward energy independence. It's a clear example of how businesses can reduce their carbon footprint, save money, and stay prepared for the future—all while keeping operations running smoothly. In today's world, where sustainability and savings go hand in hand, RENAC's innovative solutions offer businesses a blueprint for success.