125kw-261kwh commercial industrial energy storage system
125kW 261kWh Commercial & Industrial Energy Storage System PN-ESS-125/261
PN-ESS-125/261: 125kW 261kWh outdoor integrated C&I energy storage cabinet with 240kW PV access, liquid cooling and IEC 62619 certification basis.
Specifications
- Usable Energy
- 261kWh
- Rated Output Power
- 125kW
- Max. PV Input Power
- 240kW
- Number of MPPTs
- 10
- Cooling Method
- Intelligent Liquid Cooling
- Dimensions
- 1100*2105*1400mm
Product Description
The PN-ESS-125/261 is a 125kW / 261kWh outdoor integrated commercial and industrial energy storage system from the Polynet C&I ESS Series of Polynet Solar Solutions (Hefei Polynet Products Co., Ltd.). The cabinet combines photovoltaic access, liquid cooling, protection functions and flexible system expansion in one IP55 enclosure: five 52.249kWh LiFePO4 (LFP) battery modules deliver 261kWh of usable energy, 10 MPPTs accept up to 240kW of PV input, and the AC side can be paralleled with up to six cabinets for larger energy stations.
Product Features
Feature | Description |
Photovoltaic Access | 240kW maximum PV input power through 10 MPPTs with 2 strings each and a 150~950V MPPT range. |
261kWh Usable Energy | Five 52.249kWh LiFePO4 (LFP) battery modules with an 832V rated voltage. |
Intelligent Liquid Cooling | Liquid cooling holds cabinet performance across a -20℃ to +55℃ operating range. |
System Expansion | AC-side paralleling of up to six cabinets — for example 4 units for 0.5MW / 1.044MWh or 6 units for 0.75MW / 1.567MWh. |
Strong Load Adaptability | Supports 100% unbalanced loads and 110% long-term overload, with off-grid output of 1.2 times rated power for 100s, 1.4 times for 10s and 1.6 times for 200ms. |
Certified Platform | Safety / EMC per IEC/EN 62109-1/-2, IEC/EN 61000-6-2/-4, EN 55011 and IEC 62619:2022. |
BATTERY PARAMETERS | |
Usable Energy | 261kWh |
Cell Type | LFP (LiFePO4) |
Battery Module Capacity | 52.249kWh |
Number of Battery Modules | 5 |
Rated Voltage | 832V |
Maximum Charge/Discharge Current | 157A |
PV INPUT PARAMETERS | |
Maximum Input Power | 240kW |
Maximum Input Voltage | 1000V |
MPPT Voltage Range | 150~950V |
Startup Voltage | 180V |
Rated Input Voltage | 600V |
Maximum Input Current per MPPT | 42A |
Maximum Short-Circuit Current per MPPT | 60A |
Number of MPPTs | 10 |
Number of Strings per MPPT | 2 |
GRID-TIED OUTPUT PARAMETERS | |
Rated Output Power | 125kW |
Rated Output Apparent Power | 125kVA |
Rated Output Voltage | 3/N/PE, 220V/380V, 230V/400V |
Output Voltage Frequency | 50/60Hz |
Rated Output Current | 180.4/189.9A |
Maximum Input Current | 250A |
Power Factor | >0.99 (0.8 leading to 0.8 lagging) |
Total Current Harmonic Distortion | <3% |
OFF-GRID OUTPUT PARAMETERS | |
Rated Output Power | 125kW |
Maximum Off-Grid Apparent Power | Continuous output of 1.2 times rated power for 100s; 1.4 times for 10s; 1.6 times for 200ms |
Rated Output Voltage | 3/N/PE, 220V/380V, 230V/400V |
Rated Output Voltage Frequency | 50/60Hz |
Total Voltage Harmonic Distortion (@ linear load) | <2% |
EFFICIENCY | |
Maximum PCS Efficiency | 97.60% |
System Efficiency | 95.00% |
PROTECTION | |
PV Reverse Polarity Protection | Integrated |
Residual Current Monitoring | Integrated |
Battery Reverse Polarity Protection | Integrated |
Anti-Islanding Protection | Integrated |
AC Overcurrent Protection | Integrated |
AC Short Circuit Protection | Integrated |
DC Switch | Integrated |
DC Surge Protection | Level 2 |
AC Surge Protection | Level 3 |
BASIC PARAMETERS | |
Operating Temperature Range | -20~+55℃ |
Relative Humidity | 0~95% |
Maximum Operating Altitude | 3000m |
Cooling Method | Intelligent Liquid Cooling |
Human-Machine Interface | LED, WLAN+App |
BMS Communication Method | RS485, CAN |
Communication Protocol | RS485 |
Communication Interface | CAN |
Weight | ~2590kg |
Dimensions (W x H x D) | 1100*2105*1400mm |
Topology | Non-Isolated |
Protection Level | IP55 |
Firefighting System | Aerosol |
Installation Method | Floor-mounted |
Safety / EMC Standard | IEC/EN 62109-1/-2, IEC/EN 61000-6-2/-4, EN 55011, IEC 62619:2022 |
PAYMENT & DELIVERY | |
T/T — EXW / FOB | 30% T/T in advance, with the balance paid before shipment |
T/T — CFR(C&F) / CIF | 30% T/T in advance, with the balance paid against copy of B/L |
L/C | L/C at sight for amounts above 50,000 USD |
Western Union | For amounts lower than 5,000 USD |
Delivery Time | 7~20 days after receiving payment for one container |
Battery System & Safety
The battery system uses LiFePO4 (LFP) cells in five 52.249kWh modules with an 832V rated voltage and a maximum charge/discharge current of 157A. Safety functions include PV/battery reverse polarity protection, residual current monitoring, anti-islanding, AC overcurrent and short-circuit protection, an integrated DC switch, DC surge protection (Level 2), AC surge protection (Level 3) and an aerosol firefighting system. The platform follows IEC/EN 62109-1/-2, IEC/EN 61000-6-2/-4, EN 55011 and IEC 62619:2022.
Key Advantages
A maximum PCS efficiency of 97.60% and a system efficiency of 95.00% keep conversion losses low, while ultra-high energy density keeps the 1100*2105*1400mm cabinet compact for transport and installation. 100% unbalanced load support and 110% long-term overload capability absorb demanding industrial loads.
Applications
Industrial and commercial applications: industrial parks, commercial complexes, power-market trading and electrical load management. Parallel expansion to 0.5MW / 1.044MWh or 0.75MW / 1.567MWh makes the platform suitable for larger energy stations.
Contact Us
Hefei Polynet Products Co., Ltd. — Polynet Solar Solutions
Email: sales1@polynetpv.com
Website: www.polynetpv.com
Frequently Asked Questions
What is the usable energy of the PN-ESS-125/261?
The system stores 261kWh of usable energy in five 52.249kWh LiFePO4 (LFP) battery modules with an 832V rated voltage.
How do multiple cabinets expand into a larger plant?
The AC side of the PCS can be paralleled with up to six machines — for example 4 units form a 0.5MW / 1.044MWh system and 6 units form a 0.75MW / 1.567MWh system.
Can the system work with solar panels?
Yes. Up to 240kW of PV input is accepted through 10 MPPTs with a 150~950V MPPT voltage range and 600V rated input voltage.
What standards does the platform follow?
The safety / EMC standard list covers IEC/EN 62109-1/-2, IEC/EN 61000-6-2/-4, EN 55011 and IEC 62619:2022. Confirm the certification scope for the destination market in the technical agreement.