HIITIO VRFB systems deliver intrinsic safety, 20,000+ cycle life, and zero capacity degradation — trusted by EPCs, utilities, and C&I businesses across 50+ countries.
Fully integrated vanadium flow battery systems — from compact cabinets to utility-scale containers. All models share 20,000+ cycle life, 100% DOD, and unlimited storage life.
5kW / 20kWh · Entry System
All-in-one cabinet integrating stack, electrolyte, piping, and controls. Transportable as a single unit with plug-and-play installation. Ideal for distributed energy, communications, and small commercial sites.
125kW / 500kWh
20-foot containerized system. Wide operating range of -30 to 60°C. Designed for harsh environments and large industrial or utility applications.
10kW / 40kWh
Dual-stack commercial system with 840Ah rated capacity. Supports 220/380V AC. Perfect for office buildings, agriculture, and light industrial facilities.
25kW / 100kWh
Container-class system for industrial campuses and public infrastructure. 480VDC rated, 5m³ electrolyte, 4-hour duration for peak shaving and demand response.
50kW / 200kWh
Utility-class containerized VRFB delivering 480VDC with 10m³ electrolyte volume. Deployed in Pakistan, Romania, and Kazakhstan utility grid projects.
Six fundamental advantages that make VRFB the right choice for long-duration, high-cycle, safety-critical energy storage.
For long-duration storage, the numbers don’t lie. VRFB outperforms lithium-ion on every dimension that matters at scale.
The battery stack is the core electrochemical unit — composed of multiple single cells responsible for converting electrical energy to chemical energy and back. Stack size determines system power; electrolyte volume determines energy.
| Stack Model | 5 kW | 10 kW | 25 kW | 50 kW | 128 kW |
|---|---|---|---|---|---|
| Voltage Range | 41.8–58.9 V | 33–46.5 V | 44–62 V | 88–124 V | 220–310 V |
| Current Range | 85–120 A | 215–300 A | 640 A | 640 A | 640 A |
| Rated Current Density | 110 mA/cm² | 130 mA/cm² | 150 mA/cm² | 150 mA/cm² | 150 mA/cm² |
| Dimensions (H×W×D) | 430×580×510mm | 840×540×270mm | 820×800×350mm | 820×800×700mm | 820×800×1620mm |
| Weight | 100 kg | 190 kg | 350 kg | 750 kg | 1,800 kg |
| Overload Capability | 1.1× rated power, stable operation ≥10 min | ||||
| DC Conversion Efficiency | ≥80% | ||||
| Parameter | 5kW / 20kWh | 10kW / 40kWh | 25kW / 100kWh | 50kW / 200kWh |
|---|---|---|---|---|
| Rated Voltage | 48 VDC | 48 VDC | 480 VDC | 480 VDC |
| Rated Current | 105 A | 210 A | 105 A | 105 A |
| Max Current | 125 A | 250 A | 125 A | 125 A |
| Energy Efficiency | >70% | >70% | >70% | >70% |
| Rated Duration | 4 h | 4 h | 4 h | 4 h |
| Rated Capacity | 420 Ah | 840 Ah | 420 Ah | 420 Ah |
| Battery Weight | 2.2 T | 4.2 T | 12 T | 26 T |
| Cabinet Size | 2.3×1.2×2.08m | 2.8×1.3×2.08m | 6.1×2.44×2.59m | 8.5×2.5×2.67m |
| Electrolyte Volume | 1 m³ | 2 m³ | 5 m³ | 10 m³ |
| Electrolyte Conc. | 1.7M V (IV/III) | 1.7M V (IV/III) | 1.7M V (IV/III) | 1.7M V (IV/III) |
| Operating Temp. | 0–40 °C | 0–40 °C | 0–40 °C | 0–40 °C |
| Charging Limit | 60 VDC | 60 VDC | 300 VDC | 600 VDC |
| Discharge Limit | 40 VDC | 40 VDC | 200 VDC | 400 VDC |
| Cycle Life | ≥20,000 cycles | |||
| Storage Life | Unlimited | |||
| Protection Level | IP54 | |||
| AC Rated Voltage | 220 V | 220V / 380V | 220V / 380V | 220V / 380V |
Developed using HIITIO’s patented solution-casting membrane technology, the PFIC series delivers industry-leading electrochemical performance for long-duration VRFB applications.
| Parameter | HC-IEM-102 (50µm) | HC-IEM-103 (75µm) |
|---|---|---|
| Coulombic Efficiency | 96.35% | 96.47% |
| Voltage Efficiency | 90.00% | 89.94% |
| Energy Efficiency | 86.72% | 86.77% |
| Cycle Life to 80% | 67 cycles | 198 cycles |
HIITIO VRFB systems are operating at commercial and utility scale — from compact 5kW research installations to 5MW industrial grid projects.
Founded as Hecheng Electric in 2004 and rebranded HIITIO in 2018, we are headquartered in Hangzhou, Zhejiang — with 4 factories, 500+ employees, and a 30,000m² campus. We hold internationally leading patent technologies in high-performance VRFB membranes, high-activity electrodes, and wide-temperature electrolytes.
Our global partner network spans leading industrial automation, energy, and automation conglomerates. HIITIO products are deployed across North America, Europe, South America, and Southeast Asia.
Talk to Our Expert
Talk to a VRFB expert — we’ll recommend the right system, size, and configuration. Response within 24 hours.
Zhejiang HIITIO New Energy Co., Ltd.
No. 1125 Zhixing Road, Xiaoshan Economic and Technological Development Zone, Hangzhou, Zhejiang, China
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