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We finance energy storage so you can maximize usage of solar PV production and boost renewable consumption.

Battery Energy Storage System (BESS) unlocks greater solar power use, paving the way for smarter, cleaner, and more flexible energy management.

Maximize
renewable energy
Peak shaving
Buy as a
service
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How can energy storage improve efficiency and savings? 

A battery storage can give you several advantage. 

Maximize use of PV system

Charge the batteries with energy from the solar panels when you are not able to consume it directly.

Consume the solar energy stored in the batteries during the night or when your consumption is higher than the PV can produce.

Peak shaving

By storing excess solar energy or charging the battery during off-peak hours, the BESS can supply power during high-demand periods.

 

This helps avoiding costly demand charges and reducing overall energy bills.

Use energy when you save the most

Store energy when the price is lower and consume it when the price is higher.

 

Charge the battery during off-peak hours when electricity costs less and discharge it during peak hours to avoid high prices.

Smart Management system

A smart energy management system significantly enhances battery performance. It helps optimizing charging and discharging cycles based on real-time energy production, consumption patterns.

 

It can also use  electricity tariff schedules and reduce usage of grid energy during peak pricing periods. 

Why is it smart to get storage as a service?

Financing a Battery Energy Storage System (BESS) instead of using your own money helps keep your funds free for your main business activities. This way, you can focus on what matters most without tying up a lot of cash in one project. 

 

Plus, external financing gives you access to experts who can help you pick the right solution, reducing the risk of making a bad investment and ensuring everything runs smoothly. This approach lets you enjoy the benefits of energy storage without using your core business funds.

Storage unit

Stores excess electricity for later use.

  • Energy Needs and Usage Patterns: The battery capacity should align with daily energy consumption and usage patterns to ensure the battery is adapted to your needs.

  • System Compatibility: The battery characteristics must be compatible with the solar panel system and inverter to ensure seamless integration and efficient operation.

  • Depth of Discharge (DoD) and Cycle Life: Batteries should be operated within recommended DoD limits to maximize lifespan, and their cycle life should match the expected usage patterns.

  • Efficiency and Environmental Factors: Batteries with high efficiency minimize energy loss, while considerations like temperature tolerance ensure optimal performance in various environmental conditions.

 

Optimizes energy flow between solar panels, battery storage, and the grid.

 

    • Optimizes Energy Flow: Manages charging and discharging based on forecasted weather and solar PV production, grid demand, energy prices, or planned consumption.
    • Monitors and Controls: Tracks real-time parameters like battery status, temperature, and voltage, ensuring the system operates under optimal conditions.
    • Enhances Grid Integration: Coordinates with the grid and solar PV productio to enable frequency regulation, peak shaving, and voltage support.
    • Improves Performance: Uses advanced algorithms to evaluate battery health and predict future demands, optimizing operational strategies.

Converts energy between AC (grid/business use) and DC (battery storage).

  • Converts DC to AC: Transforms the direct current (DC) stored in batteries into alternating current (AC) for use with appliances or the grid.

  • Bidirectional Conversion: Enables two-way energy flow by converting AC to DC for storage and DC back to AC when needed.

  • Energy Optimization: Manages charging and discharging processes to maximize efficiency and reliability

 

Keeps the battery at optimal temperature for safety and longevity. Ensures safe operation.

  • Optimize Performance and Longevity: Real-time monitoring ensures batteries operate efficiently and extends their lifespan by maintaining optimal conditions.

  • Enhance Reliability and Safety: Advanced analytics identify potential issues early, ensuring compliance with safety standards and reducing financial risks from unexpected failures.

  • Enable Predictive Maintenance: Continuous data tracking allows operators to anticipate component failures and perform preventive maintenance, minimizing downtime and repair costs.

  • Support Remote Monitoring and Control: IoT-enabled systems provide flexibility for managing large-scale installations from anywhere, improving operational control and response times.

  • Promote Sustainable Operations: By integrating with renewable energy sources, energy storage systems help reduce reliance on fossil fuels and contribute to a more sustainable future.

 

If you already have an existing solar PV system we are able to add a BESS system to that. We can also create a offer for you were we buy your solar PV system – you get cash directly and we offer you a Power Purchase agreement where you buy the kWh that is produced at an attractive price point. 

If you don’t have a solar PV system we can of course help you to get one. Without any investment from your side. We do the investment and all the work. 


Connections to the power grid will offer different alternatives depending on the situation. 

Here are some potential scenarios: 

Grid Stability and Ancillary Services.  systems can provide grid support services such as frequency regulation, voltage control, and black-start capabilities. These services help maintain grid stability, especially as renewable energy sources like wind and solar introduce variability into the system. 

Participation in Energy Markets.  systems connected to the grid can participate in Spain’s wholesale electricity market and ancillary services markets (e.g., aFRR). These markets offer revenue opportunities through activities like energy arbitrage (buying low and selling high) or providing balancing services. 

Profitability of Energy Arbitrage. Energy arbitrage involves charging batteries during off-peak hours (low prices) and discharging during peak demand periods (high prices), capturing the price differential in the electricity market. 


The process of evaluating and getting the best storage solution for your business.

We do site inspection

  • We analyze your energy usage and requirements to identify the solution that best suits you
  • We check conditions to install

Offer and agreement

  • Clear and transparent offers. We want you to feel comfortable for the whole contract period

Good feeling

  • You maximize use of solar energy
  • You decrease dependency of energy from the grid
  • You can optimize your operations and save more
  • You can buy the system for €1 at the end of the term and continue to run it

Preparing the project

  • We analize and develop a customized design optimized for your specific needs
  • We suggest a Energy Management system based on your needs

Bright Sunday invests and installs

  • Zero investment for you
  • We handle the entire installation process, ensuring seamless integration of the battery storage system
  • We ensure efficient commissioning so that your system performs optimally from the start
Contact us to learn more

Do you have any questions about energy storage or would you like a free quote? Let’s get in touch!

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+34 919 61 89 82
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Do you want your business to benefit from solar self-consuption?

We provide custom solar PV system designs for self-consumption under a Power Purchase Agreement (PPA). Using our design request form, we create an initial estimate based on your energy needs.

 

This is a preliminary assessment. Depending on site conditions and financial feasibility, we may not proceed. Final pricing and conditions will be detailed in a formal agreement if the project moves forward.

 

Interested in solar for your business? Fill out the form to get started