at icon
biuro@greto.com.pl
European Union Content
PL
Is energy storage a good investment in 2025?
blog baner img

How does energy storage work?

An energy storage unit is a device that contains a battery pack capable of storing electricity and an inverter that converts direct current to alternating current and vice versa. Some inverters also have the option of directly connecting photovoltaic modules, in which case such an inverter is called a hybrid inverter. The main purposes of an energy storage include:

  • Captures excess energy generated by the photovoltaic panels
  • Stores electricity for times when the PV installation is not producing enough energy (e.g. at night, on cloudy days) to increase self-consumption
  • Allows energy storage to be charged at cheaper tariffs to benefit from cheap electricity throughout the day
  • Can provide a back-up in the event of a power failure and allow selected circuits (or even the whole house) to be powered in the event of a blackout

How much does energy storage cost and when will it pay for itself?

The cost of energy storage depends on its capacity, features and manufacturer.

Return on investment

  • For households, the savings from cooperation between photovoltaics and energy storage allow a return on investment after 4-6 years.
  • Companies can expect a quicker payback, due to higher consumption and market electricity prices not covered by the safety umbrella.

Who should invest in energy storage?

Energy storage is the ideal solution for:

  • Photovoltaichomeowners who want to maximise self-consumption of energy
  • Companies and industries where stability of power supply is crucial
  • Those worried about blackouts - the energy storage facility can act as an emergency power supply

Manufacturers of inverters and energy storage we recommend:

FoxESS - high quality at a good price

✅ Technology: LFP (Lithium Iron Phosphate) - safe and durable

✅ Modularity: expandable system

✅ Reliability: Well-known brand on the Polish market provides fast service support

✅ Warranty: 10 years.

Who for. For users looking for a robust but affordable solution.

 

Solax Power - versatility and intelligent management

✅ Technology: LFP - long life and safety

✅ Modularity: easily expandable (e.g. X-ESS)

✅ Intelligent management: Advanced EMS (Energy Management System)

✅ Wide product range: enables energy management between inverter, storage and EV charger

✅ Warranty: 10 years

For whom. For those who want a flexible system with advanced energy optimisation.

 

Sungrow - power and performance for the demanding

✅ Technology: LFP - robust and secure

✅ High power: high-capacity storage, ideal for businesses

✅ Comprehensive: All-in-one solutions supplied turnkey with dedicated medium-voltage substations

✅ Application: Commercial and industrial storage systems

✅ Warranty: 10 years.

 

Who for. For those looking for an advanced system with high capacity and high efficiency.

Which one to choose?

FoxESS- for those looking for affordability and robust quality.

Solax Power- for those who want intelligent energy management and flexibility.

Sungrow- for those who need power, performance and high reliability.

blog picture 5

Is it worth buying energy storage

Investing in energy storage is worthwhile, especially with rising electricity prices and available subsidies. In order to choose the best equipment to suit your needs, it is worth examining the options available. Contact us and we will be happy to help you choose the perfect device for your needs!

Check all >