Executive summary

AlphaESS, an energy storage solutions provider founded in 2012, showcased its residential, commercial and industrial (C&I), and utility-scale battery energy storage systems at Green Energy Fair 2026, held on October 28–29 at Arena Zagreb, Croatia. The company, which has installations in over 130 countries, presented its energy storage portfolio and introduced new products for the Croatian market. 

AlphaESS has installed over 300 TB125 systems, each rated at 125 kW/261 kWh, across Croatia, Slovenia, and Bosnia and Herzegovina, representing more than 80 MWh of combined storage capacity. In Croatia, over 100 TB125 units were delivered in 2026, primarily for frequency regulation projects. 

For residential applications, AlphaESS displayed the SMILE-G3-S6 and SMILE-G3-T10, offering single-phase and three-phase solutions.  

In the C&I segment, AlphaESS showcased its TB125 system and debuted the STORION-LC-TB150 in Croatia. The new system features dual liquid cooling for batteries and power conversion systems (PCS). It delivers 91.7% round-trip efficiency, temperature variation of ≤3°C, and noise levels of ≤65 dB(A).

According to AlphaESS, the TB150 provides 20% more power and 230 MWh greater projected lifetime energy delivery than comparable systems. It also incorporates multi-layer safety protection. 

For utility-scale applications, AlphaESS introduced the Aster 6260, a new energy storage system offering higher energy density. The company also presented its large-scale storage portfolio for renewable energy integration and grid flexibility.