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28/07/2026

Battery storage sizing: calculate the right capacity for your needs

Choosing the correct capacity of the storage battery is the fundamental step to maximize self-consumption and drastically reduce electricity costs on your bill. An incorrect sizing can lead to an oversized investment, with payback times that are too long, or to an undersized system that cannot cover the evening and nighttime energy demand. To calculate the ideal capacity, it is necessary to analyze your electrical consumption, in particular those that occur when the photovoltaic system does not produce energy.

WECO Batteries simplifies this process thanks to a highly modular and scalable approach. Our storage systems, such as the 5K3 EVO series, allow you to start with a base capacity and easily expand it in the future, by adding new battery modules in parallel. This flexibility is a huge advantage: if your energy needs change over time, for example with the purchase of an electric car or the installation of a heat pump, your WECO system can grow with you, without having to replace the entire installation.

Moreover, thanks to WECO’s NOOR App, you can monitor your consumption and PV production in real time. This tool provides you with precise and historical data, helping you understand whether the current capacity is sufficient or if it’s time to add a module. LiFePO4 technology then guarantees a high depth of discharge and thousands of life cycles, ensuring that every single kWh stored is actually usable to power your home with total safety and reliability.

To discover the WECO configuration best suited to your needs and start saving immediately, visit our contact page and request a personalized consultation.