REVIX JAPAN's high-voltage grid-scale BESS is a container-type battery energy storage system developed in collaboration between Tokyo Densetsu Service Co., Ltd. (TDS), a TEPCO Group company, and NEXTES Corporation. Featuring a KHK-certified fire-resistant enclosure, patented active balancing control technology, a 20-year capacity warranty, and 24/7 monitoring as standard, the system targets revenue improvement across three markets: the frequency regulation market, the capacity market, and the wholesale electricity market (subject to market conditions).
Why High-Voltage Grid-Scale BESS Now?
The explosive growth in data center demand (approximately 7 million kW of applications in the TEPCO service area — equivalent to 6 to 7 nuclear power plants) combined with the rapid expansion of renewable energy has made stabilizing the power grid an urgent priority. The government and power utilities urgently need large quantities of MW-scale batteries, and subsidy programs such as the SII "Grid-Scale Battery Storage Introduction Support Program" are well established.
High-voltage grid-scale BESS is an investment asset that enables long-term, stable, and large-scale participation in this market opportunity.
Three Strengths of TDS × NEXTES
Strength ① Safety — KHK-Certified Fire-Resistant Enclosure
The system uses a KHK-certified fire-resistant enclosure that complies with Fire Defense Agency Notification No. 200 (revised July 2024). Key features:
- Electrolyte volume can be managed at approximately 5 L per unit, eliminating the need to aggregate multiples across units.
- Simplifies site consultation in urbanization control areas (subject to discussions with fire authorities and local governments).
- Non-heated surface temperature confirmed at 80°C or below in a 60-minute heating test (in compliance with KHK test confirmation criteria).
The difference from products merely described as "KHK-equivalent" is clear: our product holds a third-party evaluation test report, making it a proven fire-resistant enclosure.
Strength ② Longevity — Active Balancing Technology (Three Patents)
Three patented control technologies developed by NEXTES Corporation achieve battery lifespan 10 times longer than conventional systems.
ACB (Active Cell Balance) Resolves voltage differences between cells at 10 times the capacity of conventional systems. Voltage adjustment is possible during charging, discharging, and standstill, preventing overall capacity degradation caused by deteriorated cells.
AMB (Active Module Balance) Module-level balancing maximizes the efficiency of the entire large-scale battery system.
IHS (Intelligent Hot-Plug Switch) Enables pack replacement while the system is operating. Maintenance can be performed without shutting down the system, sustaining uptime.
These technologies provide the technical foundation for the 20-year capacity warranty (70%).
View Longevity Technology Details on the Safety Page →
Strength ③ Support — TDS 24/7 Monitoring & One-Stop Service
24/7 remote monitoring and maintenance by Tokyo Densetsu Service (TDS) is provided as standard.
- Continuous monitoring of cell voltage, temperature, PCS operation, and cybersecurity
- Initial response within 30 minutes of alert generation
- Integrated management from EPC (engineering, procurement, construction) to O&M (operations and maintenance)
- Single point of contact for rapid response from fault identification to recovery
Furthermore, all major components have obtained JC-STAR★1 compliance labels, providing advance compliance with the security requirements that will be mandatory for new grid connections from April 2027 onward.
Product Specifications (CE007 Container Battery System)
| Item | Specification |
|---|---|
| Model | CE007-1157/2315 |
| Cell type | LFP (Lithium Iron Phosphate) |
| Nominal capacity | 2,315 kWh |
| Rated capacity | 2,083 kWh |
| Rated voltage | 1,228.8 V |
| Cooling method | Water cooling |
| IP rating | IP55 equivalent |
| Operating temperature | -20 to 45°C |
| External dimensions | L4,200 × W2,438 × H2,896 mm |
| Weight | Approx. 23 t |
| Warranty period | 20-year capacity warranty (70%) *when a maintenance service contract is in place |
| Option | Heavy snowfall-compatible (up to 2 m of snow accumulation) |
A compact cabinet-type system (CE009: nominal capacity 385.8 kWh) is also available. We propose the optimal configuration based on project scale and site conditions.
Revenue Model Overview
Revenue maximization is achieved by combining three electricity markets.
- Frequency regulation market (primary): Standby compensation centered on primary frequency response (offline)
- Capacity market: Capacity price (kW compensation) for securing supply capacity four years out
- Wholesale electricity market: Supplementary arbitrage through SOC management and price differential utilization
Proposal for FIT Solar Power Plant Owners
For owners of high-voltage solar power plants approaching or past the end of their FIT period, REVIX JAPAN can propose revenue improvement strategies combining FIP conversion and battery co-location. Under the FY2025 supplementary budget "Renewable Energy Source Co-Located Battery System Introduction Support Program," subsidies covering one-third of eligible costs (one-half for high-voltage and extra-high-voltage) are available (subject to application requirements).
Ready to Get Started?
Contact us with any questions or to request materials.
Consult on FIT Solar FIP Conversion & Battery Co-Location → High-Voltage Grid-Scale BESS Consultation / Materials Request → View the Revenue Model → Safety / KHK Certification Details →