MG Series 250 kW

The MG 25 is 3-phase, 480 VAC 250kw, commercial battery energy storage system utilizing 2 mG 125 systems in parallel. Expansion enclosures can be added to increase the battery storage from 440 kWh up to 1760 kWh. The BESS can be run in off grid systems or grid Connected where it can provide grid resiliency and grid services. The BESS is manufactured and tested in the USA.

Integrates Onsite Assets

The Battery Energy Storage System integrates, communicates with, and controls assets such as on-site PV inverters, diesel, propane, and natural gas generators, as well as grid power. The system is Microgrid ready with black start capability and ships with an external grid disconnect contactor sized to meet a site’s backup needs.

Safety & Compliance

The ESS incorporates the highest safety and compliance standards including:

UL 9540

UL 9540A

IEEE 1547

UL 3141 (Pending)

The Current ESS Advantage

Our team will proactively work with your engineers and electricians to support early design development, system installation, on-site commissioning, and testing. We develop low voltage and communication drawings for each site. We will also work with your team to develop a site-specific line drawing.

Competitive Advantage

  • Pre-Tested (Full System)

  • On-Site Commissioning

  • On-Site Training

  • Assembled in USA

  • Fire Suppression System

  • Code Compliant

  • Site-Specific Drawings

  • System Specific O & M Guide

  • Ongoing Management & Monitoring

MG 250 kW Technical Specifications

AC Parameters
Continuous AC Current
300 A RMS
Overload AC Current
360 A RMS
Continuous AC Power
250 kW @ 480
Rated AC Operating Voltage
480 VAC
AC Line Nominal Frequency
60 Hz
Power Factor Range
-1.0 to +1.0
Battery Pack
Per Rack
Battery Chemistry
NMC
Energy
110.7 kWh
Capacity
110 Ah
DC Voltage Range
740 – 1475 VDC
Nominal Voltage
1006.4 VDC
Max DC Current
139 A
# modules per rack
17 modules
Communications
Cell Modem
4G LTE Verizon
LAN
(16) Port Unmanaged Ethernet Switch
RS 485
(2) COM ports
Digital Inputs and Outputs
5 inputs, 5 outputs
USB
(2) 3.0 Ports
Canbus
(1) port
Gateway HMI
Included
Safety
200A AC Circuit Breaker
Included
DC Disconnect PCS
Included
AC Disconnect PCS
Included
NOVEC Gas Fire Suppression
Included
System Functionality & Control
Off-Grid
Black Start, Seamless Transition
Grid Disconnect Hardware Included in a Separate Enclosure
Enclosure, SEL 751, Grid Disconnect Contactor, Breakers, Switch, Factory Wired & Tested
Grid -Tied Functions
Peak Shaving, TOU, *Demand Response
EMS & BMS UPS
Included
Environmental Specifications
Enclosure
Dimension (L x W x H)
2 x 60" x 38" x 101"
Enclosure Weight (Shipping)
2430 lbs (2 enclosures)
Enclosure 220 kWh (Installed)
2 x 5490 lbs (2 enclosures)
Ambient Temperature Range
-25 - 50° C, De-rated from 45 - 50° C
Rated Max Elevation
1,000 Meters Full Power
Up to 3,000 Meters with De-rating
NEMA Rating
NEMA 3R
Cable Entry
Conduit path provided (Base)
Certifications and Compliance
PCS
IEEE 1547 and UL 1741 SB, UL 3141 Pending
Battery Racks
UL 1973, IEC 62619, UL 9540A
Enclosure
UL 9540
Seismic Analysis
ASCE 7-16
Arc Flash Evaluation
On File
Optional Safety
Enclosure
Deflagration Panels
Honeywell LI-ION Tamer
Off Gas Sensing

Product Part Numbers

BESS Units
Number of BESS Enclosures
Part Number
C-BESS 250-440
2
CMG125-5-480-50-KPM110-2
C-BESS 250-660
4
CMG125-5-480-50-KPM110-3
C-BESS 250-880
4
CMG125-5-480-50-KPM110-4
C-BESS 250-1100
6
CMG125-5-480-50-KPM110-5
C-BESS 250-1320
6
CMG125-5-480-50-KPM110-6
C-BESS 250-1540
8
CMG125-5-480-50-KPM110-7
C-BESS 250-1760
8
CMG125-5-480-50-KPM110-8

Current Energy Storage and ELM Fieldsight have been partners in designing and developing Energy Storage Systems since 2016. Our partnership today extends through selling and marketing a broad range of BESS systems manufactured by ELM. Contact us today for more details.