Lithuanian Partner: 522.5kWh High-Voltage ESS Case Study
A joint engineering journey—from verified 832V / 522.5kWh C&I grid-ready solution.
- Region: Lithuania (EU)
- Application: C&I / Grid support / Renewable integration
- System Size: 522.496kWh
- Nominal Voltage: 832V DC
- Configuration: 4×42U cabinets, 2 clusters in parallel
- Continuous Current: 200A
Challenge
European grid stability and renewable integration created a clear demand: a safe, space-efficient high-voltage C&I battery system—our Lithuanian installer partner needed a high-voltage, high-capacity storage system that was safe, reliable, and space-efficient, while still being deployable on a tight project schedule.
Solution
AVEPOWER supported a step-by-step scale-up: verified MB31 314Ah cells → pre-assembled packs → joint engineering for a 522.496kWh / 832V HV architecture with robust BMS, documentation, and integration support.
Outcome
A 522.496kWh, 832V high-voltage ESS delivered as a compact four-cabinet solution—engineered jointly, integrated smoothly on-site, and validated by stable performance and multi-level BMS protections.
From Sample Orders to a Strategic Partnership
Phase 1: Sample Cells
Starting with small sample orders of our EVE MB31 314Ah cells, we provided the building blocks for their early projects. The feedback was immediate and positive: they were impressed by the cell consistency, the accurate capacity (verified at 314Ah), and the detailed technical support we provided. This initial success built a strong foundation of trust. They knew they had found a reliable partner in Avepower.
Phase 2: Packs + System Support
As project volumes increased, the partnership evolved from individual cells to our pre-assembled battery packs, helping streamline production, cut assembly time, and support more demanding installations. We worked side-by-side with their team, providing integration documentation and engineering support.
With our BMU and BCU architecture—featuring ±0.2%FS voltage sampling accuracy and robust CAN/RS485 communication—their systems gained the control, protection, and reliability required for modern energy storage deployments.
Engineering the 522.496kWh / 832V HV ESS
The true milestone came with a demanding C&I installation: a 522.496kWh high-voltage system operating at a nominal 832V DC. The goal was clear—deliver high power with uncompromising safety, reliability, and space efficiency.
Our engineers collaborated directly with the customer’s technical team to architect the full solution: the 522.496kWh High-Voltage ESS.
We configured four 42U cabinets. Each main battery cluster consisted of 13 battery packs, with each pack built as a 1P20S configuration of MB31 cells, delivering 20.096kWh per pack. Two clusters were then safely paralleled to reach the final 832V / 628Ah / 522.5kWh specification.
Specs Table
| Item | Specification |
|---|---|
| Total energy | 522.496 kWh |
| Nominal DC voltage | 832 V |
| Capacity | 628 Ah |
| Continuous current | 200 A |
| Cabinets | 4 × 42U |
| Pack design | 1P20S, 20.096 kWh per pack |
| Cluster design | 2 clusters, each with 13 packs + BCU |
| Parallel topology | 2 clusters paralleled to final spec |
| Footprint | approx. 3200 × 1000 × 2055 mm |
| Communications | CAN / RS485 |
| Protection | Overcharge / over-discharge / over-current / temperature |
| Enclosure | IP20-rated cabinets |
Delivery Package
The project installation was successfully completed. The deployed system features robust IP20 cabinets and an intelligent BMS that continuously monitors voltage, current, and temperature—providing multi-level protections to support long-term reliability.
“AVEPOWER started as our trusted cell supplier and became a true technology partner. Their co-development support for this 522.5kWh high-voltage solution was key to winning and delivering the project.”
— Lead Engineer, Lithuanian Installation Partner
Ready to Build Your Next High-Voltage ESS Project?
Tell us your project requirements—our engineers will recommend a safe, scalable configuration.
