Introduction
EVE Lithium Energy globally launched its groundbreaking “5-year zero degradation” 5MWh long-cycle energy storage system (Mr.Giant Pro) at the RE+ 2025 expo in Las Vegas, alongside the overseas debut of its 836kWh modular cabinet (Mr.Brick). This system utilizes leading large-cell technology and long-life battery innovations, including the construction of a highly resilient inorganic SEI film and a proprietary targeted SEI film repair technology. These advancements address the fundamental electrochemical processes to significantly minimize degradation, achieving a breakthrough of 100% capacity retention over five years and tackling the industry’s pain point of “degradation upon delivery”. Compared to traditional solutions, Mr.Giant Pro enhances the entire lifecycle energy discharge of a single system by 16% and reduces the number of DC-side equipment by 16%, effectively lowering customers’ initial investment and operational costs. To address transportation challenges for overseas projects, the modular Mr.Brick cabinet employs a “divide and conquer” design, overcoming road weight restrictions and reducing logistics complexity and costs from the source. This launch represents a significant leap in energy storage technology, offering a more economical and efficient solution for global clean energy development.
| Attribute | Details |
|---|---|
| Product Name | “5-Year Zero Degradation” 5 MWh Long-Cycle ESS — also called Mr. Giant Pro in some disclosures. |
| Manufacturer / Owner | EVE Energy (also referred to as EVE Battery) |
| Launch / Unveiled | RE+ 2025 exhibition, Las Vegas (September 9-11, 2025) |
| Core Innovation / Claim | The system is advertised to have zero degradation over 5 years, meaning little to no loss in capacity over that period. To achieve this, EVE claims: – a highly resilient SEI (Solid Electrolyte Interphase) film with high proportion of inorganic layers to reduce side reactions (during transport, storage, cycling) – proprietary SEI film repair (“targeted SEI repair”) to fix defects arising during use. |
| Performance & Economic Advantages | Compared to traditional ESS solutions: ~16% higher total lifecycle discharged energy per system ~16% fewer DC-side devices required, reducing upfront & O&M cost. |
| Modular / Logistics Features | A companion product called Mr. Brick — an 836 kWh split modular cabinet system designed to overcome transport and logistics constraints (road weight limits, containerization etc.) |
| System Scale | 5 MWh capacity system. Uses large-capacity battery cells (e.g. the “628Ah Mr. Big” cells) in configurations that allow for high voltage & energy content per container system. |
| Physical / Technical Specs (where disclosed) | Some specs drawn from EVE’s liquid-cooling BESS line & related systems: • Capacity in region: 3.44-5 MWh (depending on cell Ah, configuration). • System/container size (20’ HC container typical): ~6058 × 2438 × 2896 mm, weight ~45 tons. • Operating temperature ranges in some other product lines: e.g. charging 0-55°C, discharging -20-55°C. |
| Efficiency | “Mr. Giant” minimalist system is claimed to achieve energy efficiency around 95 % (system + cell losses) in some of EVE’s materials. The “Mr. Big” cell has ~96 % efficiency in their “Flagship Series” presentation. |
| Safety / Design Considerations | • Large-cell design (“Mr.Big”) for simplified integration and maintenance. • Thermal-electric separation and liquid-electric separation in Mr. Brick design, increasing fire protection (more fire protection layer area than traditional integrated cabinets) • SEI stability & repair mechanism claimed to reduce degradation due to cycling, environmental stress, etc. |
| Uncertainties / What’s Not Yet Disclosed | Exact cycle count under which “zero degradation” is claimed (e.g. how many full-depth cycles, what C-rate, what environmental conditions) is not clearly detailed. What is meant by “zero”: whether truly zero, or negligible / within a small percentage. Long-term field or third-party validation under varying climates and loads. Cost per kWh, O&M details in different geographies. Degradation due to calendar aging (time, temperature) vs cycling. |
| Potential Implications | If the claim holds: • Reduced total cost of ownership (less capacity loss, less replacement) • Better match with solar panel lifetime (“same lifespan as solar panels” is cited in marketing) • Lower oversizing requirements • Improved economic viability of long-duration/storage applications |
Assessment & Notes
- The “5-years zero degradation” claim is ambitious. In battery / ESS industry, “zero” often means negligible degradation within tolerances; real world often shows some loss in capacity over time (due to calendar ageing, temperature, cycles). So while the technology (especially SEI improvements, repair etc.) is promising, actual performance will depend heavily on operating conditions (temperature, depth of discharge, charge/discharge rate, maintenance).
- Also, many of the public statements come from EVE’s announcements or partner media; independent testing or field trials publicly disclosed are still limited.
- Logistics and modular designs (e.g. Mr. Brick) address non-technical bottlenecks (transport, installation), which is a strong plus for global deployment.
Image Resource: https://www.evebattery.com/news-970