One of the most effective ways to lower energy expenses while contributing to sustainability is by combining an on-site solar power plant with smart battery storage. This setup allows businesses to maximize the use of their generated energy, reduce reliance on market prices, avoid transmission fees, and even earn passive income by supporting grid stability.
So why is this a smart move for businesses? Here are 5 key reasons to invest in smart battery storage.
1. Fast Return on Investment in Battery Storage
When considering investments in energy infrastructure, ROI is a major factor. With standard photovoltaics without storage, the payback period often matches or exceeds battery lifespan, making the investment uncertain.
Smart battery storage changes this equation – not only lower energy costs, but it also generates regular passive income by supporting the power grid.
Thanks to this, the payback period for a combined PV + smart storage solution drops below 5 years. Under ideal conditions, it can be even shorter, while batteries last around 15 years and PV panels up to 25 years. That means most of the life of the system is spent saving and earning.
Real-life example:
In 2024, Mincovňa Kremnica installed a smart battery system by FUERGY. Based on 1,200 MWh annual consumption, a system with 216 kWh capacity and 200 kW output was designed. The expected ROI is under 5 years - even without subsidies. The system also serves as a backup energy source, increasing operational energy security.
Smart battery storage delivers both sustainability and financial performance – faster than you might expect.
2. Passive Income from Battery, No Risk for the Business
Smart battery storage isn’t just about saving – it's also a new source of income. With energy flexibility functions, businesses receive regular compensation for helping stabilize the grid. Most importantly, this income is earned without the company taking on any grid responsibility or managing operations. Our advanced EMS (Energy Management System) manages everything automatically.
This turns businesses into active participants in the energy market – but without the risk normally involved. Energy flexibility isn’t just a technical buzzword: in practice, it means your company gets paid every month just for having the right setup in place.
Real-life example:
The most modern BILLA supermarket in Bratislava (Bajkalská Street) uses smart battery storage brAIn by FUERGY with a capacity of 108 kWh. The facility reduced its electricity-related CO₂ emissions by 25% and earns passive income from grid flexibility – fully automatically, with no operational impact.
Read more: BILLA has bet on green. With our battery brAIn, the company has reduced its emissions by almost 25%.
Smart batteries offer income, lower costs, and cleaner energy – bringing investment-like benefits to everyday business operations.
3. A New Standard in Corporate Energy Management
The European energy sector is undergoing a transformation. Fossil-based sources are being replaced by renewables, which, while being eco-friendly, are also unpredictable. The sun doesn’t always shine, and wind isn’t always available, and that’s exactly why there’s a growing need for technologies that can balance these imbalances in the grid. Smart battery storage is truly becoming the new standard in modern energy.
Businesses that are fully prepared today gain a competitive edge. With intelligent energy management, companies can optimize their consumption, make better use of their own energy production, and join ancillary service markets – resulting in savings and new revenue.
While some companies still question the value of batteries, others are already earning a nice profit and reducing their carbon footprint.
Energy flexibility is more than a trend - it’s the new reality for businesses.
Real-life example:
At the National Football Stadium in Bratislava, FUERGY implemented a smart solution that connects battery storage with heat pump systems. These devices now heat and cool the stadium, while also stabilizing the grid – with no impact on comfort or operations. The system runs fully autonomously and generates additional income.
Read more: How the National Football Stadium sets a new environmental standard.
4. Why Cheap Batteries Can't Compete with Smart Solutions
Not every battery is smart. Many companies today are installing more affordable battery storage systems that allow them to store the electricity they generate – but that’s where their capabilities end. These systems don’t connect to the grid, lack advanced energy management, and can’t offer flexibility services – the feature that generates additional income and shortens the ROI.
Lower-cost solutions often come with poor battery quality, limited capability for system expansion, and no integration with PVs or an EMS. As a result, the company may save upfront but misses out on most of the long-term benefits.
A much better strategy is an investment in a comprehensive smart system from a single provider that includes storage, energy management, servicing, and flexibility participation from the start.
FUERGY, as the only full-service energy technology company in Slovakia, providing the entire process of battery storage implementation, from energy analysis through installation to service and maintenance.
That means more benefits, fewer worries, and significantly higher returns for your business.
5. Monthly Profits from Flexibility and Consumption Optimization
Smart battery storage not only cuts energy bills – it brings real monthly income, often reaching hundreds or even thousands of euros. It all depends on proper system sizing and the level of energy use – the more a company consumes, the greater the earning potential.
Thanks to providing flexibility with smart battery storage units by FUERGY, businesses can earn over €20 per installed kWh of capacity per month. That means a 100 kWh system can generate more than €2,000 monthly – repeatedly and automatically, with no operator involvement.
This income is also independent of market electricity prices – your company earns even when prices fluctuate or fall, by providing a grid-stabilizing service. From a business perspective, this is a highly efficient way to turn fixed energy costs into a source of profit.
A profitable technology that works for you – 24/7.
That’s what smart battery storage with energy management is all about.
Energy as a Service – No Upfront Investment Needed
Not every business has tens of thousands of euros immediately available for tech investment. But that doesn’t mean they have to miss out on smart battery benefits. With the Energy as a Service model, you can get the full system without any upfront costs.
With EaaS, the system – including batteries, installation, software, and maintenance – is funded by a partner, usually an electricity supplier. The business only pays for using the solution, while immediately saving on energy and receiving a share of flexibility income.
Real-life example:
Compressor manufacturer Embraco Slovakia (Spišská Nová Ves) implemented the largest outdoor container storage with a capacity of 1,296 kWh by FUERGY through the Energy as a Service model. Their partner fully financed the solution, leaving the company with all the benefits: savings, new revenue, and improved energy security.
Read more: Embraco Slovakia reduces their carbon footprint thanks to an innovative brAIn by FUERGY storage.
This model opens the door to energy efficiency even for companies that are unable to invest today but are looking to secure a more stable, cost-effective energy setup for the future.
Investing in a Smart Battery System Will Boost Your Business Efficiency
Smart battery systems are no longer just a tech gadget for eco-conscious firms. Today, they represent a real tool for reducing costs, increasing energy self-sufficiency, and generating additional income which can significantly impact business performance.
If your business wants to be ready for the energy future, now is the time. Discover how a smart battery system can help your company. Contact us today. We will be happy to prepare a tailor-made solution for you, which will save you not only costs, but also emissions.
New dimension of energy optimization
