SOLIS - Battery DC - EverCore-261kWh-PRO-C5-125kW(21A)-NV

An architecture that breaks with the 100–120 kWh formats
The EverCore 261kWh not only shares the brand and EVE LFP 314Ah cells with its 100 and 120 kWh counterparts, but it also relies on a 1P260S battery configuration at 832V —a nominal voltage twice that of the 100kWh (320V)—which fundamentally alters the installation parameters: DC cable gauge, protection device dimensions, commissioning requirements, and ICPE fire safety regulations thresholds. The integrated S6-EH3P125K10-NV-YD-H inverter delivers up to 125 kW with 10 MPPTs/20 strings and accepts up to 4 × 42 A of Isc —allowing up to 20 strings of high-power modules in parallel.

Reference specifications (EverCore-261kWh-125kW-NV):

• Nominal capacity: 261.2 kWh — usable capacity: 261.2 kWh (100% availability rate)

• Puissance onduleur : 125 kW (S6-EH3P125K10-NV-YD-H) — cos φ > 0,99, THDi < 2 %

• Cells: EVE LFP 3.2 V / 314 Ah — 13 packs × 20.1 kWh, 1P260S configuration at 832V

• Cell lifespan: 8,000 cycles at 70% SOH (25°C, 0.5P)

• AC-AC cycle efficiency: 89%

• MPPT range: 150–950 V — 10 MPPT / 20 strings — Isc max 4 × 42 A

• Maximum connected PV power: 250 kW

• Basculement on-grid/off-grid : < 10 ms (mono) / < 20 ms (multi-onduleurs en parallèle)

• Protection: IP55 cabinet + IP66 inverter — corrosion resistance C5 (inverter), C4/C5 option (battery)

• Certification: IEC 62619, IEC 62040, IEC 63056, IEC 62477, UN 38.3

• Cabinet dimensions: 1750 × 2250 × 1450 mm — Weight: 2500 kg + 170 kg (inverter)

• Communication: CAN, RS485-115200, Ethernet, optional Wi-Fi/Cellular, LAN

• Maximum off-grid parallelization: 10 units → 1.25 MW / 15.66 MWh

Option Pro-C5 (enhanced security): flammable gas detector, explosion discharge panel, explosion-proof exhaust fan, audible/visual alarm — recommended standard for any deployment in ICPE zones and buildings with regulated activity.

Areas of application — industrial level 261 kWh
The 261 kWh format is the starting point for projects to fall under the umbrella of managed energy assets : aggregation contracts, frequency response, participation in EPEX Spot capacity markets, and microgrids with automatic STS. It meets the needs of integrators exceeding the 150 kWp threshold for PV production.

Heavy industry and production sites

• Peak shaving on subscribed power ≥ 500 kVA: the 261.2 kWh usable at 125 kW covers 30 to 45 minutes of discharge at full power — sufficient to neutralize occasional demands related to motor starts or production cycles

• Alimentation des systèmes de contrôle et capteurs critiques en mode secours <10 ms sans groupe électrogène intermédiaire

• SEVESO or ICPE sites: Pro-C5 option mandatory, gas detection + factory-integrated explosion discharge

Large photovoltaic shade structures

• Coverage area 1,200 to 2,000 m² (≈ 200–250 kWp): the 10 MPPTs / 20 strings absorb the output of a large parking lot shade structure with no entry restrictions

• PV/BESS coupling for optimized grid injection according to the HV/MV constraints of the grid operator

• CRE tender response projects: storage improves the production profile and power guarantee

Microgrids and critical power sites

• Hôpitaux, cliniques, data centers edge, centres logistiques 24/7 : la commutation <10 ms (mono) garantit la continuité des équipements critiques sans discontinuité perceptible

• Autonomous island mode: up to 10 units in parallel → 2.35 MWh of usable power to maintain a site autonomously for several hours

• Rural areas without high-voltage connections: coupling with a thermal generator for a hybrid microgrid, controlled via SolisStorageCloud

Pourquoi choisir l'EverCore 261kWh chez POwR Connect<
Le 261kWh s'inscrit dans une logique de projet — pas d'achat unitaire impulsif. POwR Connect accompagne les intégrateurs dès la phase de dimensionnement, avec un accès à l'équipe technique pour valider les schémas multi-onduleurs, les calculs de protection ICPE et les raccordements HTA.

• Professional stock on key items : prices and availability accessible via professional account — industrial projects require precise visibility on supply lead times.

• Technical file support : manufacturer documentation (IEC 62619, UN 38.3, Pro-C5) available for ICPE applications, building permits, and bank financing.

• Coupling with 21A high-power modules : the 10 MPPTs / 20 strings of the 261kWh are sized for the modules LONGi Hi-MO X10 or Tongwei TWMNH in supermarkets — POwR Connect offers both in stock

• Monitoring via SolisStorageCloud : centralized dashboard, cascading alerts, remote OTA — compatible with the reporting obligations of industrial sites under aggregation contracts

FAQ — EverCore 261kWh / 125kW

At what PV capacity is the 261kWh justified compared to the 120kWh? The switchover threshold is generally between 150 and 200 kWp installed. Below 150 kWp, the 120kWh covers the storage/production ratio. Above that, the 10 MPPTs / 20 strings of the 261kWh avoid the input limitations and production losses that 4 MPPTs would introduce on an array > 150 kWp. See the [EverCore 120kWh datasheet →]

Is the Pro-C5 option mandatory in France for the 261kWh battery? In ICPE zones (areas subject to environmental regulations), a flammable gas detector and an explosion discharge system are required by regulations (section 1416 ICPE for Li-ion batteries > 200 kWh). The Pro-C5 option integrates all these components from the factory. POwR Connect can provide the Pro-C5 technical data sheet for the DREAL instruction.

Comment fonctionne la commutation off-grid sur le 261kWh en configuration multi-onduleurs ? En mono-onduleur, le basculement est certifié <10 ms. En parallèle de plusieurs unités, le transfert peut atteindre jusqu'à 20 ms. Cette différence est à intégrer dans l'analyse de criticité des charges : les équipements tolérant une micro-coupure de 20 ms (≈ 1 cycle réseau 50Hz) fonctionnent sans ATS externe ; les équipements ultra-critiques nécessitent un onduleur double conversion en amont.

Can multiple EverCore 261kWh units be cascaded to reach several MWh? Yes. Up to 10 units can be cascaded in parallel off-grid, for a total of 1.25 MW / 15.66 MWh (2.35 MWh usable per unit × 10). Parallelization in on-grid mode is subject to grid connection capacity. For projects with more than 3 units, POwR Connect recommends prior discussion with the technical team to validate the distribution architecture.

Is the EverCore 261kWh eligible for EPEX capacity or aggregation mechanisms? The system is technically compatible with frequency response protocols (FCR, aFRR) thanks to its operating range, integrated EMS, and Ethernet/RS485-115200 connectivity. Regulatory eligibility depends on the aggregation contract signed with an RTE-certified aggregator. POwR Connect can connect with aggregator partners.