Case Study: Scalable 128KWh Solar Storage Upgrade in Austria

Case Study: Scalable 128KWh Solar Storage Upgrade in Austria 

The Challenge:

An Austrian customer with an existing 20KW solar storage system (Solax) sought to expand capacity 

with a new 48V low-voltage solution. 

After initial interest in DIY kits (16pcs 314Ah cells + Seplos Mason kit) in October 2024, 

communication stalled until November 8th, when they confirmed the need for a robust system

 compatible with DEYE 5-6KW and Victron inverters, supporting electric vehicle charging (2 BYD cars). 

Our Solution:

We delivered a turnkey 128KWh energy storage system comprising:

 •  16 premium EVE Grade A LiFePO4 cells (314Ah)  

•  Fully configured 51.2V 280Ah stackable battery packs 

 •  Seamless integration components for DEYE/Victron inverters

Abandoning the initial DIY approach, we provided pre-assembled, 

performance-optimized packs ensuring plug-and-play operation.   

The Result:

The customer successfully deployed the system alongside their existing infrastructure. 

Final installation photos confirmed: 

•  Perfect integration with solar inverters 

 •  Secure support for EV charging loads

  •  Flawless coexistence with legacy Solax equipment   

Client Feedback:

"The system runs flawlessly – everything is good. 

Very satisfied with the expanded capacity and seamless integration."

(Supporting installation images shown below)

Here is the old system

New system supplied by Deligreen/BATTQUEEN

He is very satisfied.

Installation photo. Work perfect with Deye inverter.

Everything is good.