Technical Specifications
Detailed technical parameters of the Roche Energy REL261 system
| Cell type | LFP 3.2V/314Ah |
| Battery configuration | 1P260S |
| Rated capacity | 261 kWh |
| Rated power | 125 kW |
| Inverter type | Bidirectional PCS, on-grid |
| Rated DC voltage | 832 V |
| DC voltage range | 728~936 V |
| AC Voltage | 380 / 400 V (-15% to +10%) |
| Connection | 3P 4W + PE |
| Power factor | -1 (leading) to +1 (lagging) |
| THDi | ≤3% |
| Overload capability | 120% |
| Total efficiency | 88% |
| Protection rating | IP54 |
| Corrosion protection grade | C4 |
| Cooling system | Liquid cooling |
| Fire suppression | Perfluorohexanone + water fire suppression |
| AC protection | Moulded-case circuit breaker (MCCB) |
| DC protection | Isolator switch + fuse |
| Operating temperature | -30°C do +50°C |
| Humidity | 0~95% (non-condensing) |
| Maximum altitude | ≤2000 m |
| Dimensions (W×H×D) | ~990×2470×1465 mm |
| Footprint | 1.45 m² |
| Weight | ~2.8 t |
| Communication | CAN / Ethernet / RS485 |
| Scalability | up to 20 units |
| Certificates | TÜV Rheinland: IEC 62619, IEC 62477-1 (LVD), IEC 61000 (EMC); PCS: EN 50549-1/-10, NC RfG; UN 38.3 |
Certificates
Conformity confirmed by TÜV Rheinland
The REL261 system, its PCS and its cells carry the full set of conformity certificates required for grid connection and operation in Poland and the EU. The complete document bundle is available below.
Storage system (TÜV Rheinland LGA Products)
- IEC 62619 — safety of lithium-ion cells and batteries for industrial applications
- IEC 62477-1 — Low Voltage Directive 2014/35/EU
- IEC 61000 — Electromagnetic Compatibility Directive 2014/30/EU
PCS inverter Mars-125-KT
- EN 50549-1 / EN 50549-10 — LV grid connection requirements (TÜV Rheinland)
- NC RfG certificate — network code requirements for generators in Poland
Cells, pack and system
- UN 38.3 — transport testing of the 314 Ah cells, pack and system
- Certificate for safe maritime transport
- Material Safety Data Sheet (MSDS) of the battery system
AIESS Brain
Hardware from the manufacturer. Decisions made in Poland.
Roche Energy builds and certifies the REL261 cabinet: cells, BMS, PCS, liquid cooling, fire suppression and its own EMS guarding cell-level safety. AIESS adds the Polish EMS layer above it — an on-site controller and a cloud brain that plans battery operation on TGE prices, forecasts and the capacity fee.
Roche Energy × AIESS — who does what
Roche Energy
LFP cells, BMS, PCS, liquid cooling, fire suppression, certificates, the cabinet EMS with its battery-protection settings.
AIESS (Polish EMS)
An on-site edge controller driving the cabinet EMS over Modbus TCP (remote mode, signed power setpoint), per-cabinet BMS readout — hundreds of cell voltages and temperatures, SoC/SoH — and every BMS alarm named in Polish. AIESS never overrides the manufacturer’s battery-protection settings.
Integration verified on a live 4 × REL261 (500 kW / 1044 kWh) installation in Poland.
Edge: decisions every second, even offline
The AIESS controller (Robustel EG5120) closes the control loop every 1 s: contracted-power guard, zero-export, PV self-consumption, local price guards evaluated on the device against a stored TGE curve, a Modbus interface for SCADA / the DSO, and a service mode that parks the plant while engineers work in the cabinet.
Cloud: a daily plan priced in PLN
The AIESS optimizer re-plans every 15 minutes on TGE day-ahead (15-minute) prices, PV and load forecasts, the distribution tariff and the capacity fee modelled as a daily band. Every plan is scored the next day against measured data, and savings are the bill with the battery versus a reconstructed bill without it — not an estimate.
App: the owner stays in control
Live monitor, schedules in three modes (Simple / Suggested / Pro), AI Plan, savings, push alerts and an AI assistant. Owner rules always outrank the AI plan. Data hosted in AWS eu-central-1 (Frankfurt).
Reference installation
4 × REL261 — 500 kW / 1044 kWh
Four REL261 cabinets running in parallel at a woodworking plant in Poland, controlled by a single AIESS EMS. The edge controller reads every cabinet’s BMS separately and dispatches the set as one storage system: contracted-power guard, PV self-consumption, TGE price arbitrage and capacity-fee optimisation.
Why Choose Roche Energy REL261?
Certified liquid-cooled cabinet with the Polish AIESS EMS — 125 kW / 261 kWh
261 kWh on 1.45 m²
The whole cabinet fits within a single parking space. Full component traceability; welds inspected by 3D galvanometer.
88% total efficiency
Measured honestly — including the auxiliary draw of cooling and control. Liquid cooling holds the cell temperature spread within ±1.5°C across the whole discharge window.
Three-level safety chain
Millisecond temperature sensing, pack-level suppression (perfluorohexanone + water) and a cabinet rated to 1600°C thanks to long-fibre aluminium insulation.
120% overload, weak grids
Dynamic three-phase balancing, tolerates 380/400 V from -15% to +10%. Mars-125-KT PCS certified to EN 50549 and NC RfG.
Up to 20 units in parallel
Add power without reconfiguring the controller — autonomous internal grid reconfiguration. OTA updates and self-healing: 5 years without service.
Polish AIESS EMS as standard
On-site edge controller plus cloud brain: TGE prices, forecasts, capacity fee, app and BMS alarms in Polish. Roche EMS integration verified on a live installation.
Download Resources
Technical documentation and product information
Certificate bundle
TÜV Rheinland (IEC 62619, 62477-1, 61000), EN 50549, NC RfG, UN 38.3, MSDS — ZIP archive (approx. 33 MB).
Download ZIP