Hoymiles

Series: HoyUltra Series

Hoymiles HoyUltra 2 HESS-261-2h

Name: Hoymiles Hoymiles HoyUltra 2 HESS-261-2h
Brand: Hoymiles
SKU: hoymiles-hoyultra-2-hess-261-2h

Three-phase integrated bess inverter all-in-one system with 261 kWh LFP battery

Partially verified

Best for

+ Commercial & industrial installations
+ Three-phase installations
+ Medium commercial & industrial (50-200 kWp)
+ LFP battery applications - verify cycle life from datasheet

Not ideal for

! Typical single-family residential - consider residential product line
! Single-phase installations (unless manufacturer confirms support)
! Small commercial applications (< 30 kWp) - consider smaller product
! Backup/battery-backup projects (no EPS functionality)
! Long-lifecycle projects (<=1 years standard warranty)

In the HoyUltra Series series

This is the 261 kWh variant.

Compared to other models

- 21% larger capacity than Hoymiles HoyUltra 100kW/215kWh
- Maximum capacity option in this series.

Ideal for

Ideal for projects that prioritize maximum stored energy in the series while keeping 125 kW as the design reference.

Key Specifications

Rated Output Power

125 kW

Vendor

Usable Capacity

261 kWh

Vendor

Show All Specifications

Core Electrical

AC Rated Power	125 kWVendor
AC Voltage	400Vendor
Energy (Nominal)	261 kWhVendor
Energy (Usable)	261 kWhVendor
C-rate (continuous)	-
Peak Power	137.5 kWVendor
Battery Chemistry	LFPVendor
DC Voltage Range	728 - 936 VVendor
System Round-trip Efficiency	90.3 %Vendor
Noise	70 dB(A)Vendor

EMS & Communication

EMS Included	trueVendor
Protocols	Modbus RTU, Modbus TCP, DL/T645Vendor
EMS Functions	Refined cloud-to-edge operation, Tariff management, Automated dispatchVendor
Remote Maintenance	trueVendor
Fault Diagnosis	trueVendor
Grid Support Functions Detail	PQ, VF, Black Start supportVendor
Data Logging Interval	-
Response Time	100 msVendor

Environment & Mechanical

Thermal Management	LiquidVendor
Fire Suppression	NOVEC1230 + PACK-level + WaterVendor
Detectors	Early warning cloud alerts, Smoke/Gas detectionVendor
Maintenance Access	Modular O&M (<2h module swap)Vendor
Pressure Relief	-
Thermal Runaway Mitigation	Advanced liquid cooling (PCS + Battery), no derating at 50CVendor
Lifting Points	IntegratedVendor
Service Interval	-
IP Rating	IP55Vendor
Corrosion Rating	C5Vendor
Operating Temp Range	-30 to 55Vendor
Dimensions (W x H x D)	1030 x 1400 x 2450 mmVendor
Weight	2700 kgVendor

Compliance & Warranty

Certifications	IP55, C5, ISO 3744 Noise CertificationVendor
Battery Certifications	LFP 314Ah CellsVendor
System Certifications	CEVendor
LVRT/HVRT	trueVendor
Warranty Throughput / Cycles	-

Data Confidence & Verification

Partially verified

Data Sources

+ Official datasheet - verified 2026-04-17
- Installation Manual - not available
- Certificate - not available

Data gaps that may affect your decision

! Outdoor temperature range not specified - confirm outdoor suitability.
! IP rating not documented - confirm installation location suitability.

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Compliance & Certifications

No compliance data available for this product.

Certifications

Documents & Downloads

DATASHEET PDF

Hoymiles HoyUltra 2 HESS-261-2h DatasheetDownload

Compatible Products - coming in Phase 3

Compare this product View Series Start Product Match Contact Vendor / Request Quote

Product data is sourced from manufacturers, official websites, and community contributions. Energidea does not guarantee completeness or accuracy. Installers should verify specifications, certifications, and compatibility with manufacturer documentation before quotation.

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Configuracion tipica del sistema

Grid-Tied Parallel Scaling

Large industrial parks requiring megawatt-scale storage.

Tipo de red: 3-Phase On-Grid

Adecuado para: Large scale industrial projects up to 2 MW / 4.1 MWh.

Componentes principales

Up to 16x HoyUltra 2 units in parallel.

Notas

Zero-oscillation parallel operation.

Descargo de responsabilidad: For reference only. Final system configuration should be confirmed based on local regulations, grid requirements, and project conditions.

Off-Grid Microgrid

Remote sites or critical facilities requiring VF and Black Start.

Tipo de red: 3-Phase Off-Grid

Adecuado para: Data centers, remote hospitals, island grids.

Componentes principales

Up to 8x HoyUltra 2 units in parallel.

Notas

Seamless transfer feature ensures uninterrupted power.

Descargo de responsabilidad: For reference only. Final system configuration should be confirmed based on local regulations, grid requirements, and project conditions.

VPP / Energy Trading

Aggregated storage participating in frequency response or arbitrage.

Tipo de red: 3-Phase Hybrid

Adecuado para: Aggregators and utility-scale service providers.

Componentes principales

HoyUltra 2, Third-party Cloud/VPP interface.

Notas

EMS supports seamless third-party cloud integration.

Descargo de responsabilidad: For reference only. Final system configuration should be confirmed based on local regulations, grid requirements, and project conditions.

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