GOBEL POWER
Product Datasheet
EN · Rev. 1.0
51.2 Vdc · 356 Ah · LiFePO4 · 18.23 kWh

GP-SR1-18K

Server-rack energy storage. Rack it, stack it, scale it.
18.23 kWh · 19" 6U
Energy
18.23kWh
Power
8.7kW
Cycle life
8,000+
Depth of disch.
100% DOD
Core Features Residential & small C&I
01

High capacity, safer chemistry

356 Ah LiFePO₄ cells in a 16S1P configuration — 18.23 kWh per unit at 51.2 Vdc. Stable chemistry with excellent thermal stability, 100% depth of discharge and ≥8,000 cycles. The built-in intelligent BMS guards against over-charge, over-discharge, over-temperature and short circuit.

02

Flexible installation

19" 6U rack-mount steel enclosure with casters and M8 front terminals. Rack-mount, stacked (up to 3 units) or floor-standing installation. A built-in circuit breaker provides electrical isolation.

03

Smart and connected

An optional external Wi-Fi module streams data to the Gobel VRM monitoring platform, and the battery integrates with Home Assistant and ioBroker. RS485A/CAN to the inverter plus RS485B/RS485C for parallel runs.

At a Glance Full table on page 02
Nominal voltage
51.2 Vdc
Nominal capacity
356 Ah
Nominal energy
18.23 kWh
Max. continuous current
170 A charge / 170 A discharge
Dimensions (W×H×D)
482.6 × 241.3 × 773 mm
Weight (approx.)
129.5 kg
Enclosure
19" 6U rack-mount, steel
Operating temperature
0 … +55 °C charge · −25 … +55 °C discharge
Ingress protection
IP21, indoor
Typical Applications Indoor, IP21
Residential backup and self-consumption·Off-grid and weak-grid sites·Small C&I peak shaving and load shifting·Retrofit of existing hybrid inverters over RS485/CAN.
Compliance Third-party tested
✓ IEC 62619 ✓ CE ✓ UN 38.3 Cell designation IFpP/72/186/211/[16S1P]M/0+55/95
GOBEL POWER
GP-SR1-18K · Rechargeable Li-ion Battery System
Specifications
01Electrical & energy
ModelGP-SR1-18K
Battery chemistryLiFePO₄ · 16S1P
Nominal voltage51.2 Vdc
Operating voltage range44.8 – 57.6 V
Nominal capacity [1]356 Ah
Nominal energy [1]18.23 kWh
Max. charge current [2]170 A
Max. discharge current [2]170 A
Max. continuous output power8.7 kW
Max. depth of discharge100% DOD
Cycle life≥8,000 cycles (25 °C ±2 °C, 70% EOL)
02Physical & environment
Enclosure19" 6U rack-mount, steel chassis
Dimensions (W × H × D)482.6 × 241.3 × 773 mm
Weight (approx.)129.5 kg
InstallationRack-mount / stacked (max. 3 units) / floor-standing with casters
TerminalsM8 front terminals
CoolingPassive, fanless
Ingress protectionIP21 (indoor use)
Operating temperature — charge0 … +55 °C
Operating temperature — discharge−25 … +55 °C
Storage temperature0 … +35 °C
Relative humidity≤95% RH, non-condensing
Altitude≤3,000 m
Isolation protectionBuilt-in circuit breaker
03Monitoring & communication
Inverter interfaceRS485A / CAN
Parallel interfaceRS485B / RS485C
Service interfaceRS232
Wi-FiOptional external Wi-Fi module (Gobel VRM cloud)
Dry contactYes
Third-party integrationHome Assistant · ioBroker
Cell balancingActive, built into the BMS
04Compliance & documents
CertificationsIEC 62619 · CE · UN 38.3
Protection functionsOver-charge · over-discharge · over-temperature · short circuit
Supplied documentsDatasheet · user manual · test report · MSDS
[1] Test conditions: 25 °C ±2 °C, beginning of life (BOL), 0.5C charge / 0.5C discharge, 100% DOD.
[2] Current ratings are affected by temperature and state of charge.
Note The Wi-Fi module is an optional external accessory; the battery ships without it unless ordered. Specifications are subject to change without notice — refer to the latest revision of the product manual for installation limits and safety instructions.